Multidimensional array with custom index in javascript

Question

How can I make multidimensional array in javascript in the following format:

Array[

{index}:{x-coords}
        {y-coords},

{index2}:{x-coords}
        {y-coords},
.... ];

The data should look like as follows:

Array[
{
indexabc:{10},{20}
},
{
indexxyz:{30},{40}
}
];

Also, how to access the array elements? I am storing value in them through a function so it will be called recursively.

please add the purpose to the question, because it makes a huge difference to the data structure, for example if you need iterable data structure, then an array would be better than an object with keys. but if you know the keys, for example a linked list, the an object structure would be better. so its up to you what you want. — Nina Scholz
– Nina Scholz, Commented Jun 9, 2016 at 12:19

William B · Accepted Answer · 2016-06-08 21:17:27Z

5

It sounds like you want plain old Object:

var o = {
  indexabc: { x: 10, y: 20},
  indexxyz: { x: 30, y: 40 }
};

console.log( o.indexabc.x, o.indexabc.y );

edited Jun 8, 2016 at 21:17

answered Jun 8, 2016 at 20:39

William B

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2 Comments

Arihant Over a year ago

Please look at the sample data and suggest

William B Over a year ago

I've updated my answer to match your sample data, and to show how to access the data as well. But I suggest taking an online JS tutorial to better understand Objects and Arrays

Francesco · Accepted Answer · 2016-06-08 20:38:41Z

3

If you just want to create a two-dimensional array you can easy do like that:

var a = [];
a[0] = [1,2];
a[1] = [2,3];
console.log(a[0]) // [1,2]

answered Jun 8, 2016 at 20:38

Francesco

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1 Comment

Arihant Over a year ago

Please look at the sample data and suggest

Serge Eremeev · Accepted Answer · 2016-06-08 22:12:00Z

1

var arr = [[x-coords, y-coords], [x-coords, y-coords]...]

is a multidimensional array, however if you want key - value pairs, you might want to use an object

var obj = {
    index: [x-coords, y-coords],
    index2: [x-coords, y-coords],
    ...
}

to fit your data either use William B's answer or something like that

var obj = {
    indexabc: [10, 20],
    indexxyz: [30, 40]
}

so you can access data like so

obj.indexabc[0]

edited Jun 8, 2016 at 22:12

answered Jun 8, 2016 at 20:41

Serge Eremeev

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1 Comment

Arihant Over a year ago

Please look at the sample data and suggest

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