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1import{_ as i,o as a,i as n,am as l}from"./chunks/framework.BpPtVZkH.js";const g=JSON.parse('{"title":"pipe Method","description":"","frontmatter":{},"headers":[],"relativePath":"api/pipe.md","filePath":"api/pipe.md","lastUpdated":1735513215000}'),h={name:"api/pipe.md"};function k(t,s,p,e,E,r){return a(),n("div",null,[...s[0]||(s[0]=[l(`<h1 id="pipe-method" tabindex="-1">pipe Method <a class="header-anchor" href="#pipe-method" aria-label="Permalink to &quot;pipe Method&quot;">​</a></h1><p>The <code>pipe()</code> method passes the collection through a callback and returns the callback&#39;s result, allowing you to transform the collection into any value. Unlike <code>tap()</code>, <code>pipe()</code> can change the type of the data and is often used at the end of collection processing chains.</p><h2 id="basic-syntax" tabindex="-1">Basic Syntax <a class="header-anchor" href="#basic-syntax" aria-label="Permalink to &quot;Basic Syntax&quot;">​</a></h2><div class="language-typescript vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">typescript</span><pre class="shiki shiki-themes github-light github-dark vp-code" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0"><code><span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">collect</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(items).</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">pipe</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(callback: (</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">collection</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Collection</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">T</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> U</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">): </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">U</span></span></code></pre></div><h2 id="examples" tabindex="-1">Examples <a class="header-anchor" href="#examples" aria-label="Permalink to &quot;Examples&quot;">​</a></h2><h3 id="basic-usage" tabindex="-1">Basic Usage <a class="header-anchor" href="#basic-usage" aria-label="Permalink to &quot;Basic Usage&quot;">​</a></h3><div class="language-typescript vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">typescript</span><pre class="shiki shiki-themes github-light github-dark vp-code" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">import</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> { collect } </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">from</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;ts-collect&#39;</span></span>
2<span class="line"></span>
3<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// Transform collection to a number</span></span>
4<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> numbers</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> collect</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">([</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">2</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">3</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">4</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">5</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">])</span></span>
5<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> sum</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> numbers.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">pipe</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">collection</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">())</span></span>
6<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">console.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">log</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(sum) </span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// 15</span></span>
7<span class="line"></span>
8<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// Transform collection to an object</span></span>
9<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> items</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> collect</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">([</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;a&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;b&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;c&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">])</span></span>
10<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> result</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> items.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">pipe</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">collection</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ({</span></span>
11<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  count: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">count</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(),</span></span>
12<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  items: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">all</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(),</span></span>
13<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  first: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">first</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span></span>
14<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}))</span></span>
15<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">console.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">log</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(result)</span></span>
16<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// { count: 3, items: [&#39;a&#39;, &#39;b&#39;, &#39;c&#39;], first: &#39;a&#39; }</span></span></code></pre></div><h3 id="working-with-objects" tabindex="-1">Working with Objects <a class="header-anchor" href="#working-with-objects" aria-label="Permalink to &quot;Working with Objects&quot;">​</a></h3><div class="language-typescript vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">typescript</span>

16<pre class="shiki shiki-themes github-light github-dark vp-code" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Product</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
17<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  id</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
18<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  name</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span></span>
19<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  price</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
20<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  stock</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
21<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span>
22<span class="line"></span>
23<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> products</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> collect</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">Product</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;([</span></span>
24<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  { id: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, name: </span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;Widget&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, price: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">100</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, stock: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">5</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> },</span></span>
25<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  { id: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">2</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, name: </span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;Gadget&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, price: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">200</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, stock: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">10</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
26<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">])</span></span>
27<span class="line"></span>
28<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// Transform to inventory summary</span></span>
29<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> summary</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> products.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">pipe</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">collection</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ({</span></span>
30<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  totalProducts: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">count</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(),</span></span>
31<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  totalValue: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;price&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">),</span></span>
32<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  averagePrice: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">avg</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;price&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">),</span></span>
33<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  totalStock: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;stock&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">),</span></span>
34<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  outOfStock: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">where</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;stock&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">).</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">count</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span></span>
35<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}))</span></span></code></pre></div><h3 id="real-world-examples" tabindex="-1">Real-world Examples <a class="header-anchor" href="#real-world-examples" aria-label="Permalink to &quot;Real-world Examples&quot;">​</a></h3><h4 id="order-summary-generator" tabindex="-1">Order Summary Generator <a class="header-anchor" href="#order-summary-generator" aria-label="Permalink to &quot;Order Summary Generator&quot;">​</a></h4><div class="language-typescript vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">typescript</span>

35<pre class="shiki shiki-themes github-light github-dark vp-code" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Order</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
36<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  id</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span></span>
37<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  items</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Array</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;{</span></span>
38<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    productId</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span></span>
39<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    quantity</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
40<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    price</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
41<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  }&gt;</span></span>
42<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  status</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;pending&#39;</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;completed&#39;</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;cancelled&#39;</span></span>
43<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  customerType</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;regular&#39;</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;vip&#39;</span></span>
44<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span>
45<span class="line"></span>
46<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> OrderSummary</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
47<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  totalOrders</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
48<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  totalValue</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
49<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  averageOrderValue</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
50<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  itemsSold</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
51<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  vipOrders</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
52<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  ordersByStatus</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Record</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">string</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;</span></span>
53<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span>
54<span class="line"></span>
55<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">class</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> OrderAnalyzer</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
56<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">  generateSummary</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">orders</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Collection</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">Order</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;)</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> OrderSummary</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
57<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">    return</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> orders.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">pipe</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">collection</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ({</span></span>
58<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      totalOrders: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">count</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(),</span></span>
59<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      totalValue: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">

59order</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span></span>
60<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        order.items.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">reduce</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">((</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">item</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> sum </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">+</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> item.price </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">*</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> item.quantity, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
61<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      ),</span></span>
62<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      averageOrderValue: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">avg</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">order</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span></span>
63<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        order.items.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">reduce</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">((</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">item</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> sum </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">+</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> item.price </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">*</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> item.quantity, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
64<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      ),</span></span>
65<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      itemsSold: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">order</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span></span>
66<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        order.items.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">reduce</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">((</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">item</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> sum </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">+</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> item.quantity, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
67<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      ),</span></span>
68<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      vipOrders: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">where</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;customerType&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;vip&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">).</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">count</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(),</span></span>
69<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      ordersByStatus: collection</span></span>
70<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">groupBy</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;status&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
71<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">map</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">group</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> group.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">count</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">())</span></span>
72<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">all</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span></span>
73<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">    }))</span></span>
74<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  }</span></span>
75<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div><h4 id="inventory-report-generator" tabindex="-1">Inventory Report Generator <a class="header-anchor" href="#inventory-report-generator" aria-label="Permalink to &quot;Inventory Report Generator&quot;">​</a></h4><div class="language-typescript vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">typescript</span>

75<pre class="shiki shiki-themes github-light github-dark vp-code" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> StockItem</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
76<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  sku</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span></span>
77<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  name</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span></span>
78<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  quantity</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
79<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  reorderPoint</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
80<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  location</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span></span>
81<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  lastRestocked</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Date</span></span>
82<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span>
83<span class="line"></span>
84<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> InventoryReport</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
85<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  date</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Date</span></span>
86<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  totalItems</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
87<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  totalStock</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
88<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  lowStockItems</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">[]</span></span>
89<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  stockByLocation</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Record</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">string</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;</span></span>
90<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  reorderNeeded</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
91<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    sku</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span></span>
92<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    quantity</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
93<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    daysLastRestocked</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
94<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  }[]</span></span>
95<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span>
96<span class="line"></span>
97<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">class</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> InventoryReporter</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
98<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">

98  generateReport</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">inventory</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Collection</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">StockItem</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;)</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> InventoryReport</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
99<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">    const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> today</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> new</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Date</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span></span>
100<span class="line"></span>
101<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">    return</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> inventory.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">pipe</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">collection</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ({</span></span>
102<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      date: today,</span></span>
103<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      totalItems: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">count</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(),</span></span>
104<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      totalStock: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;quantity&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">),</span></span>
105<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      lowStockItems: collection</span></span>
106<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">filter</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">item</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> item.quantity </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">&lt;=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> item.reorderPoint)</span></span>
107<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">pluck</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;sku&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
108<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">all</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(),</span></span>
109<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      stockByLocation: collection</span></span>
110<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">groupBy</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;location&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
111<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">map</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">group</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> group.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;quantity&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">))</span></span>
112<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">all</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(),</span></span>
113<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      reorderNeeded: collection</span></span>
114<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">filter</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">item</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> item.quantity </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">&lt;=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> item.reorderPoint)</span></span>
115<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">map</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">item</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ({</span></span>
116<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">

116          sku: item.sku,</span></span>
117<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">          quantity: item.reorderPoint </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">-</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> item.quantity,</span></span>
118<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">          daysLastRestocked: Math.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">floor</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span></span>
119<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">            (today.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">getTime</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">() </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">-</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> new</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Date</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(item.lastRestocked).</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">getTime</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">/</span></span>
120<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">            (</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">1000</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> *</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 60</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> *</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 60</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> *</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 24</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
121<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">          )</span></span>
122<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        }))</span></span>
123<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">all</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span></span>
124<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">    }))</span></span>
125<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  }</span></span>
126<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div><h3 id="advanced-usage" tabindex="-1">Advanced Usage <a class="header-anchor" href="#advanced-usage" aria-label="Permalink to &quot;Advanced Usage&quot;">​</a></h3><h4 id="sales-performance-analyzer" tabindex="-1">Sales Performance Analyzer <a class="header-anchor" href="#sales-performance-analyzer" aria-label="Permalink to &quot;Sales Performance Analyzer&quot;">​</a></h4><div class="language-typescript vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">typescript</span><pre class="shiki shiki-themes github-light github-dark vp-code" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> SaleRecord</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
127<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  id</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span></span>
128<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  date</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Date</span></span>
129<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  amount</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
130<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  category</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span></span>
131<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  salesPerson</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span></span>
132<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  region</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span></span>
133<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span>
134<span class="line"></span>
135<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> SalesAnalysis</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
136<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  topPerformers</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Array</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;{</span></span>
137<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    salesPerson</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span></span>
138<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    totalSales</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
139<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    averageTransaction</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
140<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  }&gt;</span></span>
141<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  categoryPerformance</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Record</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">string</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">

141, {</span></span>
142<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    total</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
143<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    count</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
144<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    average</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
145<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  }&gt;</span></span>
146<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  regionalBreakdown</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Record</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">string</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, {</span></span>
147<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    revenue</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
148<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    transactions</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
149<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">    topCategory</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span></span>
150<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  }&gt;</span></span>
151<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span>
152<span class="line"></span>
153<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">class</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> SalesAnalyzer</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
154<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">  analyzeSales</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">sales</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Collection</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">SaleRecord</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;)</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> SalesAnalysis</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
155<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">    return</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> sales.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">pipe</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">collection</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ({</span></span>
156<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      topPerformers: collection</span></span>
157<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">groupBy</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;salesPerson&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
158<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">map</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">((</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">sales</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">person</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ({</span></span>
159<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">          salesPerson: person,</span></span>
160<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">          totalSales: sales.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;amount&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">),</span></span>
161<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">          averageTransaction: sales.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">avg</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;amount&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
162<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        }))</span></span>
163<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">sortByDesc</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;totalSales&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
164<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">take</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">5</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
165<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">all</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(),</span></span>
166<span class="line"></span>
167<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      categoryPerformance: collection</span></span>
168<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">groupBy</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;category&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
169<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">map</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">((</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">sales</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">category</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ({</span></span>
170<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">          [category]: {</span></span>
171<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">            total: sales.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;amount&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">),</span></span>
172<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">            count: sales.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">count</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(),</span></span>
173<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">            average: sales.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">avg</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;amount&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
174<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">          }</span></span>
175<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        }))</span></span>
176<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">reduce</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">((</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">acc</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">curr</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ({ </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">...</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">acc, </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">...</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">curr }), {}),</span></span>
177<span class="line"></span>
178<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">      regionalBreakdown: collection</span></span>
179<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">groupBy</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;region&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
180<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">map</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">((</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">sales</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">region</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ({</span></span>
181<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">          [region]: {</span></span>
182<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">            revenue: sales.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;amount&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">),</span></span>
183<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">            transactions: sales.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">count</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(),</span></span>
184<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">            topCategory: sales</span></span>
185<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">              .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">groupBy</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;category&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
186<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">              .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">map</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">((</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">catSales</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">cat</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ({</span></span>
187<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">                category: cat,</span></span>
188<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">                total: catSales.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;amount&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
189<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">              }))</span></span>
190<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">              .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">sortByDesc</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;total&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
191<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">              .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">first</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span></span>
192<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">              ?.category </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">||</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;&#39;</span></span>
193<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">          }</span></span>
194<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        }))</span></span>
195<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">        .</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">reduce</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">((</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">acc</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">curr</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ({ </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">...</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">acc, </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">...</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">curr }), {})</span></span>
196<span class="line"><span style="--shiki-light:#24292E;--

196shiki-dark:#E1E4E8;">    }))</span></span>
197<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  }</span></span>
198<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div><h2 id="type-safety" tabindex="-1">Type Safety <a class="header-anchor" href="#type-safety" aria-label="Permalink to &quot;Type Safety&quot;">​</a></h2><div class="language-typescript vp-adaptive-theme"><button title="Copy Code" class="copy"></button><span class="lang">typescript</span><pre class="shiki shiki-themes github-light github-dark vp-code" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> TypedProduct</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
199<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  id</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
200<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  price</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
201<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  stock</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
202<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span>
203<span class="line"></span>
204<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> products</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> collect</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">TypedProduct</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;([</span></span>
205<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  { id: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, price: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">100</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, stock: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">5</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> },</span></span>
206<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  { id: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">2</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, price: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">200</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, stock: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">10</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
207<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">])</span></span>
208<span class="line"></span>
209<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// Type-safe transformation</span></span>
210<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Summary</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
211<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  total</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
212<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">  average</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span></span>
213<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span>
214<span class="line"></span>
215<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> summary</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Summary</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> products.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">pipe</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">collection</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ({</span></span>
216<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  total: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">sum</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;price&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">),</span></span>
217<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">  average: collection.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">avg</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;">&#39;price&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span></span>
218<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}))</span></span>
219<span class="line"></span>
220<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// TypeScript enforces return type</span></span>
221<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">// const invalid: string = products.pipe(...)</span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">

221  // ✗ TypeScript error</span></span></code></pre></div><h2 id="return-value" tabindex="-1">Return Value <a class="header-anchor" href="#return-value" aria-label="Permalink to &quot;Return Value&quot;">​</a></h2><ul><li>Returns the result of the callback function</li><li>Can return any type (not limited to collections)</li><li>Return type is inferred by TypeScript</li><li>Original collection remains unchanged</li><li>Callback receives the full collection</li><li>Useful for final transformations</li></ul><h2 id="common-use-cases" tabindex="-1">Common Use Cases <a class="header-anchor" href="#common-use-cases" aria-label="Permalink to &quot;Common Use Cases&quot;">​</a></h2><h3 id="_1-report-generation" tabindex="-1">1. Report Generation <a class="header-anchor" href="#_1-report-generation" aria-label="Permalink to &quot;1. Report Generation&quot;">​</a></h3><ul><li>Creating summaries</li><li>Generating analytics</li><li>Building dashboards</li><li>Producing statistics</li><li>Formatting data</li></ul><h3 id="_2-data-transformation" tabindex="-1">2. Data Transformation <a class="header-anchor" href="#_2-data-transformation" aria-label="Permalink to &quot;2. Data Transformation&quot;">​</a></h3><ul><li>Converting formats</li><li>Restructuring data</li><li>Creating exports</li><li>Building responses</li><li>Formatting output</li></ul><h3 id="_3-analysis" tabindex="-1">3. Analysis <a class="header-anchor" href="#_3-analysis" aria-label="Permalink to &quot;3. Analysis&quot;">​</a></h3><ul><li>Performance metrics</li><li>Sales analysis</li><li>Inventory reports</li><li>Customer insights</li><li>Market analysis</li></ul><h3 id="_4-api-responses" tabindex="-1">4. API Responses <a class="header-anchor" href="#_4-api-responses" aria-label="Permalink to &quot;4. API Responses&quot;">​</a></h3><ul><li>Formatting responses</li><li>Building payloads</li><li>Creating DTOs</li><li>Structuring data</li><li>Preparing output</li></ul><h3 id="_5-business-intelligence" tabindex="-1">5. Business Intelligence <a class="header-anchor" href="#_5-business-intelligence" aria-label="Permalink to &quot;5. Business Intelligence&quot;">​</a></h3><ul><li>KPI calculations</li><li>Performance metrics</li><li>Trend analysis</li><li>Market insights</li><li>Revenue reports</li></ul><h3 id="_6-export-generation" tabindex="-1">6. Export Generation <a class="header-anchor" href="#_6-export-generation" aria-label="Permalink to &quot;6. Export Generation&quot;">​</a></h3><ul><li>CSV creation</li><li>PDF preparation</li><li>Excel formatting</li><li>Data extraction</li><li>Report building</li></ul><h3 id="_7-financial-reports" tabindex="-1">7. Financial Reports <a class="header-anchor" href="#_7-financial-reports" aria-label="Permalink to &quot;7. Financial Reports&quot;">​</a></h3><ul><li>Revenue summaries</li><li>Profit calculation</li><li>Cost analysis</li><li>Budget reports</li><li>Sales forecasts</li></ul><h3 id="_8-inventory-analysis" tabindex="-1">8. Inventory Analysis <a class="header-anchor" href="#_8-inventory-analysis" aria-label="Permalink to &quot;8. Inventory Analysis&quot;">​</a></h3><ul><li>Stock summaries</li><li>Reorder reports</li><li>Location analysis</li><li>Movement tracking</li><li>Availability reports</li></ul><h3 id="_9-customer-analytics" tabindex="-1">9. Customer Analytics <a class="header-anchor" href="#_9-customer-analytics" aria-label="Permalink to &quot;9. Customer Analytics&quot;">​</a></h3><ul><li>Behavior analysis</li><li>Purchase patterns</li><li>Segment reports</li><li>Loyalty metrics</li><li>Engagement data</li></ul><h3 id="_10-performance-metrics" tabindex="-1">10. Performance Metrics <a class="header-anchor" href="#_10-performance-metrics" aria-label="Permalink to &quot;10. Performance Metrics&quot;">​</a></h3><ul><li>Sales performance</li><li>Employee metrics</li><li>Product analysis</li><li>Service levels</li><li>Efficiency reports</li></ul>`,42)])])}const y=i(h,[["render",k]]);export{g as __pageData,y as default};

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