Question

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Dynamically creating keys in javascript associative array

usually we initialize an array like this:

var ar = [‘Hello’, ‘World’];

And for access to it’s values we do:

alert(ar[0]); // Hello

But I want a custom index to assign, ex:

var ar = [‘first’ => ‘Hello’, ‘second’ => ‘World’];

and then

alert(ar[‘first’]);

But I can’t find how, is there something like this that I could do for assign?

Thank’s!

Answer 1

You could use Object instead of Array, you can specify named properties for object

var ar = {
  first: 'hello',
  second: 'world'
};
alert(ar['first']);

Also you can just assign properties with string keys to your array, this will also work:

var ar = [];
ar['first'] = 'first';
alert(ar['first']);