Checking if an array has some items in coffeescript

Question

Is there some method in coffeescript that returns true when an array has some items in it? Like method in ruby present?:

[].present? false
[1].present? true

According to http://arcturo.github.com/library/coffeescript/07_the_bad_parts.html an array emptiness in coffeescript is determined by its length

alert("Empty Array")  unless [].length

that seems so lame to me.

Answer 1

I don't think there is but can be:

Array::present = ->
  @.length > 0

if [42].present()
  # why yes of course
else
  # oh noes

A very simple and incomplete implementation but it should give you some ideas. And for the record, there's no present? method in Ruby, the method is added by the active_support gem.

Answer 2

Unfortunately, there isn't. The best way to do it is by comparing its length.