From: Sam Smoot <ssmoot@...>
Date: 2006-12-29T07:20:07+09:00
Subject: Re: Higher-Order Procedures Tutorial (long)

The filter_evens() example is not very ruby-ish. (As I interpret it
anyways.) I might write it like this:

class Fixnum
  def even?
    self % 2 == 0
  end
  def odd?
    not self.even?
  end
end

Then instead of a filter_evens() method, I would just:

list.select { |n| n.even? }

Or even shorter:

list.select &:even?

...if you have 'facets/symbol/to_proc' or 'active_support' loaded.