Question

What is the shortest way of writing the following JavaScript as CoffeeScript?

var obj = {};

(function(){
  this.foo = "bar";
}).call(obj);

I can do this:

obj = {}

(->
  @foo = "bar"
).call obj

But is there a way to get rid of the parentheses around the function definition? This would almost work:

do =>
  @foo = "bar"

…except that the fat arrow operator ‘=>’ automatically binds the function to the current value of ‘this’. Is there a way to specify an alternative ‘this’ value when using the fat arrow?

Answer 1

You can’t get rid of the parentheses, but you can write that function in a single line.

(-> @foo = 'bar').call obj