Writing Block Methods that Classify or Collect : Enumerable « Collections « Ruby






  1. Ruby
  2. Collections
  3. Enumerable

Writing Block Methods that Classify or Collect


module Enumerable
  def find_no_more_than(limit)
    inject([]) do |a,e|
      a << e if yield e
      return a if a.size >= limit
      a
    end
  end
end

a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
a.find_no_more_than(3) { |x| x % 2 == 0 }            # => [2, 4, 6]








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