Javascript Array with String Key

Question

Is it possible in JavaScript create a array with string Key.?

eg:-

arr[0]['col1']="Firstname";
arr[0]['col2']="Lastname";

arr[1]['col1']="firstname1";
arr[1]['col2']="lastname2";

Arrays are just objects with a special length property and methods inherited from Array.prototype. The "keys" or "indexes" are standard object property names and are just numeric strings. When numbers are used as property names, they are first converted to strings, e.g. a[1] is the same as a["1"]. — RobG
– RobG, Commented Mar 29, 2013 at 6:29

Explosion Pills · Accepted Answer · 2013-03-29 04:38:49Z

8

Yes, but it's called an object, not an array.

arr = [{col1: 'Firstname', col2: 'Lastname'},
    {col1: 'Firstname', col2: 'Lastname'}];

You can access (assign or retrieve) the values by arr[0]['col1'] and even arr[0].col1.

EDIT: For clarification the data structure that looks like an array with string keys is called an object. This example is still using an array (with numeric keys).

edited Mar 29, 2013 at 4:38

answered Mar 29, 2013 at 4:32

Explosion Pills

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1 Comment

Ted Hopp Over a year ago

Actually, this is an array of objects.

chrx · Accepted Answer · 2013-03-29 04:38:04Z

3

You'll most likely want to use an object literal:

var studentAges = {
  sara: 14,
  mike: 17,
  daniel: 15,
  Jake: 14
};

There are no associate arrays in JavaScript.

answered Mar 29, 2013 at 4:38

chrx

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Comments

Petar Ivanov · Accepted Answer · 2013-03-29 04:33:52Z

1

Yes, by using objects:

var ar = [
    {  col1: "...", col2: "..." },
    {  col1: "...", col2: "..." },
];

answered Mar 29, 2013 at 4:33

Petar Ivanov

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