Can't get JavaScript Array to work in OOP style

Question

Hi currently I'm trying to get following snippet of code to work:

function Entry() {
    var pauses = new Array();
}

Entry.prototype = {
   AddElement: function(aParameter) {
      this.pauses.push(aParameter);
   }
}

Unfortunately this code fails with following error in Safari if I try to call AddElement("Test");

TypeError: Result of expression 'this.pauses' [undefined] is not an object. Does anybody know why?

Brian Campbell · Accepted Answer · 2010-09-14 19:25:43Z

1

In your code, pauses is a local variable within the Entry() function, not a member on the object constructed by it.

You want to replace var pauses = ... with this.pauses = ....

answered Sep 14, 2010 at 19:25

Brian Campbell

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Kenan Banks · Accepted Answer · 2010-09-14 19:25:54Z

1

change

var pauses = new Array();

to

this.pauses = new Array();

or, better

this.pauses = [];

answered Sep 14, 2010 at 19:25

Kenan Banks

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1 Comment

Tyler Gillies Over a year ago

whats the difference between new Array() and []?

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