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Array.prototype.unique
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| // from http://twitter.com/WebReflection/status/83867362490720258 | |
| Array.prototype.unique = // extend the array prototype | |
| [].unique || // if it doesn't exist | |
| function( | |
| a | |
| ){ | |
| return function() { // with a function that | |
| return this.filter(a) // filters by the cached function | |
| } | |
| }( | |
| function(a,b,c) { // which | |
| return c.indexOf( // finds out whether the array contains | |
| a, // the item | |
| b + 1 // after the current index | |
| ) < 0 // and returns false if it does. | |
| } | |
| ) |
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| Array.prototype.unique=function(a){return function(){return this.filter(a)}}(function(a,b,c){return c.indexOf(a,b+1)<0}) |
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| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| Version 2, December 2004 | |
| Copyright (C) 2011 Jed Schmidt <http://jed.is> | |
| Everyone is permitted to copy and distribute verbatim or modified | |
| copies of this license document, and changing it is allowed as long | |
| as the name is changed. | |
| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | |
| 0. You just DO WHAT THE FUCK YOU WANT TO. |
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| { | |
| "name": "unique", | |
| "description": "Array.prototype.unique, by @WebReflection", | |
| "keywords": [ | |
| "array", | |
| "unique" | |
| ] | |
| } |
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| <!DOCTYPE html> | |
| <title>Foo</title> | |
| <div>Expected value: <b>1,2,3,4,5</b></div> | |
| <div>Actual value: <b id="ret"></b></div> | |
| <script> | |
| Array.prototype.unique=function(a){return function(){return this.filter(a)}}(function(a,b,c){return c.indexOf(a,b+1)<0}) | |
| document.getElementById( "ret" ).innerHTML = [1,2,3,4,5,4,3,2,1].unique().sort() | |
| </script> |
ghost
commented
Oct 27, 2017
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