From 59b3b901b54f0d21fef683e0b402a1ba81c90c19 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Wed, 20 Dec 2017 11:34:13 +0200
Subject: [PATCH] Build

---
 README.md       | 30 ++++++++++++++++++++++++++++++
 docs/index.html | 22 ++++++++++++++++++++++
 tag_database    |  1 +
 3 files changed, 53 insertions(+)

diff --git a/README.md b/README.md
index 8602666f2..76c1ece00 100644
--- a/README.md
+++ b/README.md
@@ -112,6 +112,7 @@
 * [`cleanObj`](#cleanobj)
 * [`objectFromPairs`](#objectfrompairs)
 * [`objectToPairs`](#objecttopairs)
+* [`orderBy`](#orderby)
 * [`select`](#select)
 * [`shallowClone`](#shallowclone)
 * [`truthCheckCollection`](#truthcheckcollection)
@@ -1534,6 +1535,35 @@ const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]);
 // objectToPairs({a: 1, b: 2}) -> [['a',1],['b',2]])
 ```
 
+[⬆ back to top](#table-of-contents)
+
+### orderBy
+
+Returns a sorted array of objects ordered by properties and orders.
+
+Uses a custom implementation of sort, that reduces the props array argument with a default value of 0, it uses destructuring to swap the properties position depending on the order passed.
+If no orders array is passed it sort by 'asc' by default.
+
+```js
+const orderBy = (arr, props, orders) =>
+  arr.sort((a, b) =>
+    props.reduce((acc, prop, i) => {
+      if (acc === 0) {
+        const [p1, p2] = orders[i] === 'asc' ? [a[prop], b[prop]] : [b[prop], a[prop]];
+        acc = p1 > p2 ? 1 : p1 < p2 ? -1 : 0;
+      }
+      return acc;
+    }, 0)
+  );
+/*
+const users = [{ 'name': 'fred',   'age': 48 },{ 'name': 'barney', 'age': 36 },
+  { 'name': 'fred',   'age': 40 },{ 'name': 'barney', 'age': 34 }];
+orderby(users, ['name', 'age'], ['asc', 'desc']) -> [{name: 'barney', age: 36}, {name: 'barney', age: 34}, {name: 'fred', age: 48}, {name: 'fred', age: 40}]
+orderby(users, ['name', 'age']) -> [{name: 'barney', age: 34}, {name: 'barney', age: 36}, {name: 'fred', age: 40}, {name: 'fred', age: 48}]
+*/
+```
+
+
 [⬆ back to top](#table-of-contents)
 
 ### select
diff --git a/docs/index.html b/docs/index.html
index f54dbf473..0e946aa88 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -154,6 +154,7 @@
 </h3><a class="sublink-1" href="#cleanobj">cleanObj</a>
 <a class="sublink-1" href="#objectfrompairs">objectFromPairs</a>
 <a class="sublink-1" href="#objecttopairs">objectToPairs</a>
+<a class="sublink-1" href="#orderby">orderBy</a>
 <a class="sublink-1" href="#select">select</a>
 <a class="sublink-1" href="#shallowclone">shallowClone</a>
 <a class="sublink-1" href="#truthcheckcollection">truthCheckCollection</a>
@@ -964,6 +965,27 @@ Also if you give it a special key (<code>childIndicator</code>) it will search d
 <pre><code class="language-js">const objectToPairs = obj =&gt; Object.keys(obj).map(k =&gt; [k, obj[k]]);
 // objectToPairs({a: 1, b: 2}) -&gt; [['a',1],['b',2]])
 </code></pre>
+</div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="orderby">orderBy</h3></div><div class="section double-padded">
+<p>Returns a sorted array of objects ordered by properties and orders.</p>
+<p>Uses a custom implementation of sort, that reduces the props array argument with a default value of 0, it uses destructuring to swap the properties position depending on the order passed.
+If no orders array is passed it sort by 'asc' by default.</p>
+<pre><code class="language-js">const orderBy = (arr, props, orders) =&gt;
+  arr.sort((a, b) =&gt;
+    props.reduce((acc, prop, i) =&gt; {
+      if (acc === 0) {
+        const [p1, p2] = orders[i] === 'asc' ? [a[prop], b[prop]] : [b[prop], a[prop]];
+        acc = p1 &gt; p2 ? 1 : p1 &lt; p2 ? -1 : 0;
+      }
+      return acc;
+    }, 0)
+  );
+/*
+const users = [{ 'name': 'fred',   'age': 48 },{ 'name': 'barney', 'age': 36 },
+  { 'name': 'fred',   'age': 40 },{ 'name': 'barney', 'age': 34 }];
+orderby(users, ['name', 'age'], ['asc', 'desc']) -&gt; [{name: 'barney', age: 36}, {name: 'barney', age: 34}, {name: 'fred', age: 48}, {name: 'fred', age: 40}]
+orderby(users, ['name', 'age']) -&gt; [{name: 'barney', age: 34}, {name: 'barney', age: 36}, {name: 'fred', age: 40}, {name: 'fred', age: 48}]
+*/
+</code></pre>
 </div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="select">select</h3></div><div class="section double-padded">
 <p>Retrieve a property that indicated by the selector from object.</p>
 <p>If property not exists returns <code>undefined</code>.</p>
diff --git a/tag_database b/tag_database
index 3a78d941c..a6657b911 100644
--- a/tag_database
+++ b/tag_database
@@ -71,6 +71,7 @@ median:math
 nthElement:array
 objectFromPairs:object
 objectToPairs:object
+orderBy:object
 palindrome:math
 percentile:math
 pick:array