Scala underscore in Ruby

README.md

Scala's Undersore in Ruby

Yeah, Ruby is awesome:

# Without underscore
[1, 2, 3].map { |i| i + 1 }
[{ name: "Sasha" }, { name: "Tori" }].map { |actress| actress[:name] }

# With underscore
[1, 2, 3].map(&_ + 1)
[{ name: "Sasha" }, { name: "Tori" }].map(&_[:name])

underscore.rb

class Underscore < BasicObject
  def initialize
    @calls = []
  end

  def method_missing(name, *args, &block)
    @calls << [name, args, block]
    self
  end

  def to_proc
    -> (object) do
      @calls.reduce(object) do |obj, (method, args, block)|
        obj.public_send(method, *args, &block)
      end
    end
  end
end

module Kernel
  def _
    Underscore.new
  end
end