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

As others have said, no, there's currently no syntax for interpolated key strings in object literals in CoffeeScript; but it seems at some point this feature existed! In these GitHub issues there's some discussion about it: #786 and #1731.

It's implemented in Coco and LiveScript as:

b = 'foo'
a = {"#{b}": 'baz'}

# Or..
a = {(b): 'bar'}