momonga

main.rb

class Object
	def _
		self_ = self
		Class.new(BasicObject) do
			define_singleton_method(:method_missing) do |name, *args, &block|
				return self_.__send__(name, *args, &block) unless block && block.parameters.size == 0
				self_.__send__(name, *args) do |*args|
					Object.new.instance_eval do
						define_singleton_method(:_) { args[0] }
						args.size.times do |i|
							define_singleton_method("_#{i + 1}") { args[i] }
						end
						instance_eval &block
					end
				end
			end
		end
	end
end

name = "homu"

0._.upto(3){
	p _1 + _1
}

p [1, 2, 3]._.map { _ * 10 }
p [5, 3, 2, 6, 1, 4]._.sort { _2 <=> _1 }