(function(){function append(name,method){if(!Array.prototype[name])Array.prototype[name]=method};append("contains",function(elements){return this.every(function(element){return this.indexOf(element)>=0},elements)});append("exfiltrate",function(elements){return this.filter(function(element){return this.indexOf(element)<0},elements)});append("every",function(fn,scope){for(var i=0;i<this.length;i++)if(!fn.call(scope||window,this[i],i,this))return false;return true});append("filter",function(fn,scope){var r=[];for(var i=0;i<this.length;i++)if(fn.call(scope||window,this[i],i,this))r.push(this[i]);return r});append("forEach",function(fn,scope){for(var i=0;i<this.length;i++)fn.call(scope||window,this[i],i,this)});append("getRange",function(start,end){var items=this;if(items.length<1)return[];start=start||0;end=Math.min(typeof end=="undefined"?this.length-1:end,this.length-1);var r=[];if(start<=end)for(var i=start;i<=end;i++)r[r.length]=items[i];else for(var i=start;i>=end;i--)r[r.length]=items[i];return r});append("indexOf",function(subject,offset){for(var i=offset||0;i<this.length;i++)if(this[i]===subject)return i;return-1});append("inArray",function(subject){for(var i=0;i<this.length;i++)if(subject==this[i])return true;return false});append("insertAt",function(index,element){for(var k=this.length;k>index;k--)this[k]=this[k-1];this[index]=element;return this});append("map",function(fn,scope){scope=scope||window;var r=[];for(var i=0;i<this.length;i++)r[r.length]=fn.call(scope,this[i],i,this);return r});append("removeAt",function(index){for(var k=index;k<this.length-1;k++)this[k]=this[k+1];this.length--;return this});append("randomize",function(){return this.sort(function(){return(Math.round(Math.random())-0.5)})});append("some",function(fn,scope){for(var i=0;i<this.length;i++)if(fn.call(scope||window,this[i],i,this))return true;return false});append("unique",function(){return this.filter(function(element,index,array){return array.indexOf(element)>=index})})})();