How to call index number of function array in javascript

Question

I have the following list of functions:

var functions = {
                    blah: function () {
                        alert("blah");
                    },
                    foo: function () {
                        console.log("foo");
                    }
                };

I am now trying to access a specified index of the functions array, however I'm only getting undefined.

So console.log(functions[0]); returns undefined.

Can anyone explain why this is happening and instruct me on how to call a specified index of a function array in javascript? I need to cycle sequentially through the array, so need to call it by position number rather than name.

functions is an object, not an array.

j08691
– j08691

2015-03-06 01:44:04 +00:00
Commented Mar 6, 2015 at 1:44 — j08691
– j08691, Commented Mar 6, 2015 at 1:44
functions is an object, not an array

Mauricio Poppe
– Mauricio Poppe

2015-03-06 01:44:10 +00:00
Commented Mar 6, 2015 at 1:44 — Mauricio Poppe
– Mauricio Poppe, Commented Mar 6, 2015 at 1:44

Donal · Accepted Answer · 2015-03-06 01:56:32Z

5

It is not an array. It is an object.

You simply call it like this:

functions.foo();

or

functions.blah();

If you want to have an array of functions, your syntax would look something like this:

var functions = [{
    blah: function () {
        alert("blah");
    }
}, {
    foo: function () {
        console.log("foo");
    }
}];

You would call it like this:

functions[0].blah();

You can even do this:

var functions = [alert("blah"), console.log("foo")];

functions[0];
functions[1];

See here: http://jsfiddle.net/donal/29r8sthd/1/

edited Mar 6, 2015 at 1:56

answered Mar 6, 2015 at 1:44

Donal

33.2k10 gold badges69 silver badges75 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Nin-ya Over a year ago

OP said, he/she does not want to call it by function name.

Evan Trimboli Over a year ago

OP also said that an object literal is an array.

Collectives™ on Stack Overflow

How to call index number of function array in javascript

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related