最簡單的數組去重

<script type="text/javascript">
	var Arr=['quequ','stack','protopyte','customer','previous','stack','previous','stack'];
	var newArr=[];
	var i=0;
	
	function toCompare(term,obj){
		var fettle=true;
		
		for(i=0; i<obj.length; i++){
			if(obj[i]==term){
				fettle=false;
			}
		}
		
		if(fettle){
			obj.push(term);
		}
	}
	
	for(j=0; j<Arr.length; j++){
		toCompare(Arr[j],newArr)
	}
	
	document.write(Arr+'<br />');
	document.write(newArr);
</script>

<script type="text/javascript">
	var Arr=['quequ','stack','protopyte','customer','previous','stack','previous','stack'];
	var newArray=[];
	var i=0;
	
	function toCompare(term,obj) {
	  for(var j in obj) {
	      if(obj[j] == term) {
	       return true;
	      }
	  }
	  return false;
	} 
	
	for(i=0 ; i<Arr.length; i++){
	   if( !toCompare( Arr[i] , newArray) )
	      newArray.push( Arr[i] );
	}
	
	document.write(Arr+'<br />');
	document.write(newArray);
</script>