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Array.prototype.some
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| [].some || (Array.prototype.some = function ( | |
| a, // callback | |
| b, // thisObject | |
| c, // 'this' shortcut | |
| d // placeholder for iterator/result | |
| ){ | |
| for ( | |
| c = this, | |
| d = c.length; | |
| d--; | |
| ) | |
| if (d in c && a.call(b, c[d], d, c)) break; | |
| return !!~d // d's value can be 0 to X (if callback returns true) or -1 | |
| }) |
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| [].some||(Array.prototype.some=function(a,b,c,d){for(c=this,d=c.length;d--;)if(d in c&&a.call(b,c[d],d,c))break;return!!~d}) |
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| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| Version 2, December 2004 | |
| Copyright (C) 2011 Sebastien P. https://twitter.com/#!/_sebastienp | |
| 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": "Array.prototype.some", | |
| "description": "ES5 Array.prototype.some polyfill", | |
| "keywords": [ | |
| "ES5", | |
| "Array", | |
| "some", | |
| "polyfill" | |
| ] | |
| } |
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| <!DOCTYPE html> | |
| <title>Foo</title> | |
| <div>Expected value: <b>false</b></div> | |
| <div>Actual value: <b id="ret"></b></div> | |
| <script> | |
| Array.prototype.some=function(a,b,c,d){for(c=this,d=c.length;d--;)if(d in c&&a.call(b,c[d],d,c))break;return!!~d} | |
| document.getElementById("ret").innerHTML = ["140","bytes","rocks"].some(function(a){return a==="sucks"}) | |
| </script> |
Is function(a,b){for(var c=this,d=-1,e=c.length>>>0;++d<e;)if(d in c&&a.call(b,c[d],d,c))break;return d<e} better ?
Yap better.
Though I don't think ES5 fallbacks are the best choice for code golf in general because things should be really tight and follow spec as these methods are added to native prototypes.
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@jdalton : you said "it's more hacky than correct", you're right, but I think it's kinda the whole point of 140bytes.
Is
function(a,b){for(var c=this,d=-1,e=c.length>>>0;++d<e;)if(d in c&&a.call(b,c[d],d,c))break;return d<e}better ?