Splitting string by whitespace, without empty elements?

Question

I am trying to explode an string using javascript to pick searchterms, whitespace-separated. However I get empty array elements if a searchterm is ended by a whitespace, as

Answer 1

If you want a function that you can use, just extend String:

 String.prototype.splitNoSpaces = function(){
     return this.split(' ').filter(function(i){return i});
 };

 //Now use it!
 var classString = "class1    class2 class3    class4";
 var classArray = classString.splitNoSpaces();

 //classArray[0] is class1
 //classArray[1] is class2
 //classArray[2] is class3
 //classArray[3] is class4

Thanks to @user1079877 for the hint