Feature #15922: Enumerable#partition(pattern)

• Status: Open
• Assignee: -
• Target version: -

[kachick (Kenichi Kamiya)]

• any? all? one? none? already can take pattern argument. ref: https://bugs.ruby-lang.org/issues/11286
• select reject is proposed to take pattern argument. ref: https://bugs.ruby-lang.org/issues/14197

I would like to use partition with pattern argument for consistency.

module Enumerable
  alias_method :original_partition, :partition

  def partition(*args, &block)
    case args.size
    when 1
      pattern = args.first
      original_partition do |element|
        pattern === element
      end
    when 0
      original_partition(&block)
    else
      raise ArgumentError
    end
  end
end

[1, 2, 3.3, 4, 5.5].partition(Integer)
#=> => [[1, 2, 4], [3.3, 5.5]]