fun.rb

class Symbol
  def | other
    -> arg { other.to_proc[arg.send(self)] }
  end

  def call(*args)
    -> arg { arg.send(self, *args) }
  end
end

class Proc
  def | other
    -> arg { other.to_proc[call(arg)] }
  end

  alias < call
end

p :split.("->") | :flatten | :size | :chr < File.read($0)
p :split | :take.(10) | :reverse < File.read($0)