Array indexOf() Reference Error?

[vlceversa]

Hello,

I have these simple code lines and on line 20 I'm getting the error in the comment but I cant find the problem in my code

  var directions      = [0,1,2,3];
  var lockedDirection = 0;
  var lastDirection   = 2; // sample code

  switch (lastDirection) {
  case 0:
       lockedDirection = 2;
       break;
  case 1:
       lockedDirection = 3;
       break;
  case 2:
       lockedDirection = 0;
       break;
  case 3:
       lockedDirection = 1;
       break;
  };


  var a = directions.indexOf(lockedDirection); // ReferenceError: Function directions.indexOf is undefined
  directions.splice(a, 1);

[Dan Ebberts · Accepted solution]

I believe the version of JavaScript AE uses only supports indexOf for strings, not arrays.

Dan

[vlceversa]

Ok, so AE JavaScript != JavaScript? Thats a bad implementation. If Adobe wants us to use JavaScript for Scripting then they should implement it the right way . I found a Solution here, had to implement the function myself. Array.prototype.indexOf() - JavaScript | MDN

Btw, do I violate any Copyright with implementing this function in my Script?

[Dan Ebberts]

As of the CS6 Scripting Guide, ExtendScript supports the 3rd edition of the ECMA-262 standard (which appears to be at edition 5.1 now).

Dan

[vlceversa]

Yes, and this one is from 1999, now we have 2015

[Christian Lett]

I often add functionality to the built in Javascript objects via their prototype, including indexOf:

/**

* Array.indexOf - Like String.indexOf() but checks for an object in an array

*

* @method

* @param  {Object} obj object to find in the array

* @returns {Number} location in the array of the object, or -1 if not found

*/

if(!Array.prototype.indexOf) {

    Array.prototype.indexOf = function(obj) {

        for(var i=0; i<this.length; i++) {

            if(obj===this) {

                return i;

            }

        }

        return -1;

    };

}