Length of a JavaScript object

Question

I have a JavaScript object. Is there a built-in or accepted best practice way to get the length of this object?

const myObject = new Object();
myObject["         


        

Answer 1

Below is a version of James Coglan's answer in CoffeeScript for those who have abandoned straight JavaScript :)

Object.size = (obj) ->
  size = 0
  size++ for own key of obj
  size