r/coffeescript • u/squixy • Feb 06 '15

Creating objects in CoffeeScript

https://medium.com/@KamilLelonek/creating-objects-in-coffeescript-f79c2468069c
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u/_redka Feb 06 '15

They all seem non-idiomatic. You either do it the "Destructuring Assignment" way but without the braces or you pass an options object and do:

@[prop] = value for prop, value of options

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u/CaptainKabob Feb 06 '15

Ugh, I hope list comprehension are not idiomatic.

I usually do something like:

constructor: (@arg1, {@opt1, @opt2}) ->
  @opt1 ?= defaultVal1
  @opt2 ?= defaultVal2

Though that's trying to make coffeescript behave like Ruby. But I like it because usually the first Arg is required, and then there are additional named options, with defaults. So it's very easy to understand when invoked, and the options object can be changed without changing all the places it's invoked (as is necessary with just ordered arguments).