Is it possible to define a dynamically named property using object literal in JavaScript?

Question

Consider the following

var a = {foo: \"bar\"};

Equivalent to

var a = {};
a.foo = \"bar\";

Equivalent to

Answer 1

To answer your question, this is the only way that I know of. It uses eval. But beware, eval is evil!

var b = "foo";
var a = eval('({ ' + b + ': ' + '"bar"' + ' })');

This is an ugly solution. To play it safe you should not rely on this. Don't use it!