Add array to associative array/object [duplicate]

Question

I'm new to Javascript and I would like to know how to make an associative array in JavaScript. I want to push my array in the main array to for an associative array. I know how to do it in PHP.

PHP equivalent:

$associativeArray = [
    [
        'name' => 'Bob',
        'age' => '18',
        'address' => '442 Grand Ave'
    ],
];

How can I do the same in Javascript?

Here is my code:

var mainArray = {};

var arr = [];
arr['name'] = 'Bob';
arr['age'] = '18';
arr['address'] = '442 Grand Ave';

arr.push(mainArr);

console.log(mainArr); // output: {}

Use an object literal for the arr variable, and switch your push around to mainArr.push(arr). — Heretic Monkey
– Heretic Monkey, Commented Feb 5, 2019 at 21:15

p.s.w.g · Accepted Answer · 2019-02-05 21:16:34Z

2

In Javascript, you use {...} to define objects (key-value pairs, roughly equivalent to associative arrays in PHP), and [...] to define arrays. What you're looking for is:

var arr = [];

var obj = {};
obj['name'] = 'Bob';
obj['age'] = '18';
obj['address'] = '442 Grand Ave';

arr.push(obj);

console.log(arr);

Or more succinctly:

var array = [{
  name: 'Bob',
  age: '18',
  address: '442 Grand Ave',
}];

console.log(array); // output: {}

On a further note, JavaScript does allow mixing numeric indexes (e.g. arr[0]) and string keys (e.g. obj['name']) on a single object, but in practice, this is generally discouraged because it can be quite confusing.

answered Feb 5, 2019 at 21:16

p.s.w.g

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0_0 · Accepted Answer · 2019-02-05 21:17:38Z

1

JavaScript is a lot different than PHP. The example you have shown with PHP would not work with JavaScript. I am not sure what exactly you would like to achieve but here's sort of an updated code to what you were trying to do.

var mainArray = {};

var arr = [];
mainArray['name'] = 'Bob';
mainArray['age'] = '18';
mainArray['address'] = '442 Grand Ave';

arr.push(mainArray);

console.log(arr);

answered Feb 5, 2019 at 21:17

0_0

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