Javascript - multidimensional associative array

Question

I would like to know (if it's possible) how I can push data into a multidimensional associative array with JavaScript like this:

myarray['type1']['label1'].push('Data to insert');
myarray['type1']['label1'].push('Data2 to insert');
myarray['type1']['label1'].push('Data3 to insert');


myarray['type2']['label1'].push('Data to insert');
myarray['type2']['label2'].push('Data1 to insert');
myarray['type2']['label2'].push('Data2 to insert');

Here is the answer thanks to Brennan:

myarray = {};
myarray['type1'] = {};
myarray['type1']['label1'] = [];
myarray['type1']['label1'].push('Data to insert');
myarray['type1']['label1'].push('Data2 to insert');
myarray['type1']['label1'].push('Data3 to insert');

console.log(myarray);

http://jsfiddle.net/177zu9n4/

Thanks a lot.

Make sure that you do this first... myarray['type1']['label1'] = [] — Mr. Polywhirl
– Mr. Polywhirl, Commented Feb 10, 2015 at 17:14

Brennan · Accepted Answer · 2015-02-10 17:29:07Z

3

First, there needs to be an array there to push the data into:

myarray = {};
myarray['type1'] = {};
myarray['type1']['label1'] = [];
myarray['type1']['label1'].push('Data to insert');
myarray['type1']['label1'].push('Data2 to insert');
myarray['type1']['label1'].push('Data3 to insert');

edited Feb 10, 2015 at 17:29

answered Feb 10, 2015 at 17:14

Brennan

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4 Comments

Bergi Over a year ago

@SofianeSadi: no it's not

Brennan Over a year ago

Indeed. This is not how how you should build your 'associative arrays'. An "associative array" should be a javascript object, which is used exactly for key value named pairs. Edited my answer to be more clear @SofianeSadi

Pogrindis Over a year ago

@Bergi i cant think of any valid reason in JS to use an assoc array over an obj can you ?!

Bergi Over a year ago

@Pogrindis: The point is that there are no associative arrays, yes :-)

João Miguel Brandão · Accepted Answer · 2015-02-10 17:24:28Z

2

myarray= {};
myarray.type1= {};
myarray.type1.label1= "Data to insert";

console.log(myarray.type1.label1);

Is this what you need? If label1 is somehow meant to hold stuff too, as an array:

myarray= {};
myarray.type1= {};
myarray.type1.label1= [];

myarray.type1.label1.push("data");

console.log(myarray.type1.label1);

Note that I used both object and arrays in the last example, and only objects in the first. Each have case-specific uses they are better at.

edited Feb 10, 2015 at 17:24

answered Feb 10, 2015 at 17:14

João Miguel Brandão

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