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rated 0 times [ 69] [ 1] / answers: 1 / hits: 19165 / 11 Years ago, wed, july 24, 2013, 12:00:00

I would expect the following three associative arrays to be identical:

arr1 = { dynamic:foo, bar:baz };



key = dynamic;    

arr2 = { key:foo, bar:baz };



arr3 = {};

arr3[key] = foo;

arr3[bar] = baz;

In the above examples, arr1 and arr3 are the same, but arr2 is different.

Is it possible to use dynamic keys in the declaration of a javascript associative array?

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answered 11 Years ago santana · Accepted Answer

It is now possible to use dynamic keys in the declaration of a javascript object, in any browser/platform that supports ES6 literal shorthands:

key = dynamic;    

arr2 = {

    [key]: foo,  // dynamic: foo

    bar: baz

};