rayfranco/LICENSE.txt

## README.md

      
    Raw
  

              README.md
            
          
    Polyfill for ES5: Array.prototype.indexOf

A tweet-sized ES5-compatible polyfill for Array.prototype.indexOf

  
## annotated.js
// Avoid overwriting prototype if not neccessary
[].indexOf||(Array.prototype.indexOf=
function(
   a, // search item
   b, // startIndex and/or counter
   c  // length placeholder
) {
   for (
      // initialize length
      var c = this.length,
          // initialize counter (allow for negative startIndex)
          b = (c + ~~b) % c
      // loop if index is smaller than length,
      // index is set in (possibly sparse) array
      // and item at index is not identical to the searched one
      b < c && (!(b in this || this[b] !== a));
      // increment counter
      b++
   );
   // if counter equals length (not found), return -1, otherwise counter
   return b ^ c ? b : -1;
})

## index.js
[].indexOf||(Array.prototype.indexOf=function(a,b,c){for(c=this.length,b=(c+~~b)%c;b<c&&(!(b in this)||this[b]!==a);b++);return b^c?b:-1;})

## LICENSE.txt
            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 Alex Kloss <alexthkloss@web.de>

 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.

## package.json
{
  "name": "indexOf",

  "description": "polyfill an ES5-compatibile Array.prototype.indexOf where needed.",

  "keywords": [
    "array",
    "indexof",
    "es5",
    "polyfill"
  ]
}

## test.html
<!DOCTYPE html>
<title>Foo</title>
<div>Expected value: <b>0,1,2,-1</b></div>
<div>Actual value: <b id="ret"></b></div>
<script>

  var indexOf =

  [].indexOf||(Array.prototype.indexOf=function(a,b,c){for(var b=b|0,c=this.length;b<c&&(!(b in this||this[b]!==a));b++);return b^c?-1:b;})

  var testdata=[1,2,3,5];
  document.getElementById( "ret" ).innerHTML = [indexOf.call(testdata,1), indexOf.call(testdata,2), indexOf.call(testdata,3), indexOf.call(testdata,4)];
</script>
	// Avoid overwriting prototype if not neccessary
	[].indexOf\|\|(Array.prototype.indexOf=
	function(
	a, // search item
	b, // startIndex and/or counter
	c // length placeholder
	) {
	for (
	// initialize length
	var c = this.length,
	// initialize counter (allow for negative startIndex)
	b = (c + ~~b) % c
	// loop if index is smaller than length,
	// index is set in (possibly sparse) array
	// and item at index is not identical to the searched one
	b < c && (!(b in this \|\| this[b] !== a));
	// increment counter
	b++
	);
	// if counter equals length (not found), return -1, otherwise counter
	return b ^ c ? b : -1;
	})
	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	Version 2, December 2004

	Copyright (C) 2011 Alex Kloss <alexthkloss@web.de>

	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.
	{
	"name": "indexOf",

	"description": "polyfill an ES5-compatibile Array.prototype.indexOf where needed.",

	"keywords": [
	"array",
	"indexof",
	"es5",
	"polyfill"
	]
	}
	<!DOCTYPE html>
	<title>Foo</title>
	<div>Expected value: <b>0,1,2,-1</b></div>
	<div>Actual value: <b id="ret"></b></div>
	<script>

	var indexOf =

	[].indexOf\|\|(Array.prototype.indexOf=function(a,b,c){for(var b=b\|0,c=this.length;b<c&&(!(b in this\|\|this[b]!==a));b++);return b^c?-1:b;})

	var testdata=[1,2,3,5];
	document.getElementById( "ret" ).innerHTML = [indexOf.call(testdata,1), indexOf.call(testdata,2), indexOf.call(testdata,3), indexOf.call(testdata,4)];
	</script>