Reusable Abstractions in CoffeeScript

[raganwald]

https://github.com/raganwald/homoiconic/blob/master/2012/01/reuseable-abstractions.md#readme

[swannodette]

As I mentioned in a tweet to raganwald the problem with this approach is that the object becomes opaque and can no longer be manipulated. ClojureScript allows you to preserve the dual use.

[Cushman → swannodette]

Since JavaScript functions can have properties, you can construct such a function in pure CoffeeScript:

  ofunc =(obj = {})->
    fn =(k)->@[k]
    bound =(args...)=>
      fn.apply(bound, args)
    bound extends obj
  
  o = ofunc [1,2,3]
  > o(0)
  1
  > o[0] = 10
  10

Not that I recommend this, for the obvious reasons.

[raganwald → Cushman]

interesting, although I think this code creates a copy of the original object’s properties rather than proxying them. Mind you, that could be what you want some times...

[beggi]

Great article. Just want to point out Katy (https://github.com/raganwald/Katy) is a fantastic addition to CoffeeScript.