Using indexOf method on array in server side JavaScript

Sometime back I was trying to use indexOf method on an Array object in server-side JavaScript (SSJS) code. But it was giving me error that indexOf method is not defined. I also couldn't find this method in help documentation. It was then it struck me that the implementation indexOf method in client side JavaScript itself is a bit fuzzy with Internet Explorer not supporting it. It can be defined using prototype property.

I found a simple solution here which implements the method. Just add the below code snippet to your SSJS code and then you would be able to use indexOf method.

if(!Array.indexOf) {
   Array.prototype.indexOf = function(obj) {
      for(var i=0; i<this.length; i++) {
         if(this[i]==obj) {
            return i;
         }
      }
      return -1;
   }
}

Remember that this would be required for SSJS. For client side JavaScript I would recommend using dojo.indexOf.