/*
	* Sugar Arrays (c) Creative Commons 2006
	* http://creativecommons.org/licenses/by-sa/2.5/
	* Author: Dustin Diaz | http://www.dustindiaz.com
	* Reference: http://www.dustindiaz.com/basement/sugar-arrays.html
*/
Function.prototype.method = function (name, fn) {
	if ( !Array.prototype.hasOwnProperty(name) ) {
		this.prototype[name] = fn;
	}
	return this;
};

Array.
	method(
		'forEach',
		function(fn, thisObj) {
			var scope = thisObj || window;
			for ( var i=0, j=this.length; i < j; ++i ) {
				fn.call(scope, this[i], i, this);
			}
		}
	).
	method(
		'every',
		function(fn, thisObj) {
			var scope = thisObj || window;
			for ( var i=0, j=this.length; i < j; ++i ) {
				if ( !fn.call(scope, this[i], i, this) ) {
					return false;
				}
			}
			return true;
		}
	).
	method(
		'some',
		function(fn, thisObj) {
		    var scope = thisObj || window;
			for ( var i=0, j=this.length; i < j; ++i ) {
		        if ( fn.call(scope, this[i], i, this) ) {
		            return true;
		        }
		    }
		    return false;
		}
	).
	method(
		'map',
		function(fn, thisObj) {
		    var scope = thisObj || window;
		    var a = [];
		    for ( var i=0, j=this.length; i < j; ++i ) {
		        a.push(fn.call(scope, this[i], i, this));
		    }
		    return a;
		}
	).
	method(
		'filter',
		function(fn, thisObj) {
		    var scope = thisObj || window;
		    var a = [];
		    for ( var i=0, j=this.length; i < j; ++i ) {
		        if ( !fn.call(scope, this[i], i, this) ) {
		            continue;
		        }
		        a.push(this[i]);
		    }
		    return a;
		}
	).
	method(
		'uniq',
		function(fn) {
		    var h = {};
		    var a = [];
		    var fn = fn || function() { return this; };
		    for ( var i=0, j=this.length; i < j; ++i ) {
		        if (!h[fn(this[i])]) {
		            h[fn(this[i])] = true;
		            a.push(this[i]);
		        }
		    }
		    return a;
		}
	).
	method(
		'indexOf',
		function(el, start) {
		    var start = start || 0;
		    for ( var i=start, j=this.length; i < j; ++i ) {
		        if ( this[i] === el ) {
		            return i;
		        }
		    }
		    return -1;
		}
	).
	method(
		'lastIndexOf',
		function(el, start) {
		    var start = start || this.length;
		    if ( start >= this.length ) {
		        start = this.length;
		    }
		    if ( start < 0 ) {
		         start = this.length + start;
		    }
		    for ( var i=start; i >= 0; --i ) {
		        if ( this[i] === el ) {
		            return i;
		        }
		    }
		    return -1;
		}
	);