JavaScript deletes repeated characters in a string

JavaScript deletes repeated characters in a string:
This section describes how to delete a repeating character in a string, regardless of the actual value, as a learning algorithm is also very good.
The code is as follows:

function droprepeat (str) {  var result=[];   var hash={};    for (var i=0, Elem; i<str.length;i++) {    Elem=str[i];     if (! Hash[elem]) {      Hash[elem]=true;      Result=result+elem;    }  }   return result;}

The functions in the above code can delete the repeated characters in the string, using the example:

Droprepeat ("ABCDD")

The return value is: ABCD.

The original address is: http://www.softwhy.com/forum.php?mod=viewthread&tid=8278

For more information, refer to: http://www.softwhy.com/javascript/

JavaScript deletes repeated characters in a string