Store and iterate function pointers in JavaScript

Question

I would like to store function pointers in an Array and then execute all of them in a foreach loop.

var array = new Array();

array['foo'] = function() { doFoo(); };
array['bar'] = function() { doBar(); };

How do I iterate and execute all functions in array?

JavaScript arrays are intended to be used with numeric indexes. Assigning to the same index twice overwrites the previous assignment. — Pointy
– Pointy, Commented Sep 13, 2014 at 18:36
Updated my question. The double iteration was not my question. Sorry for being a bit unclear. — Andreas
– Andreas, Commented Sep 13, 2014 at 18:37

Pointy · Accepted Answer · 2014-09-13 18:40:04Z

1

First, if you really want to use non-numeric property names, you don't need an array:

var obj = {};

obj["foo"] = function() { doFoo(); }
obj["bar"] = function() { doBar(); }

To iterate and call the functions:

for (var k in obj) {
  obj[k]();
}

To be pedantic, it's usually considered a good idea to make sure you're not running into unexpected properties inherited from the prototype:

for (var k in obj) {
  if (obj.hasOwnProperty(l))
    obj[k]();
}

answered Sep 13, 2014 at 18:40

Pointy

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