From: Dave Thomas <Dave@...>
Date: 2001-03-20T15:15:46+09:00
Subject: [ruby-talk:12915] Passing multiple blocks to a method


Just an observation (and I'm waiting for six people to quote previous
ruby-talk articles to show they'd thought of this first):

When we get keyword arguments, a slight extension to the syntax will
also allow us to pass multiple blocks to a method:

  def polar_plot(x, y)
    0...n times do |i|
       angle = i*TWO_PI/n
       x_pos = x.call(angle)
       y_pos = y.call(angle)
       drawTo(x, y)
    end
  end

  polar_plot x: { |i| sin(i) }  y: {|i| i*i }


(Borrowing a leaf from Smalltalk's book)


Dave