gistfile1.rb

class Point
  attr_reader :x, :y
  
  def initialize(x, y)
    @x, @y = x, y
  end
  
  def ~ point
    Math.sqrt((point.x - self.x) ** 2 +     
    (point.y - self.y) ** 2)
  end
end

p1,p2 = Point.new(-4,14), Point.new(12,-34)
puts (p1.~(p2))
# puts (p1 ~ p2) #  ArgumentError: wrong number of arguments (0 for 1)
                 # Treating p1 ~ p2 as p1(~p2) instead of p1.~(p2)
                 # Seems inconsistent with behaviour of +@ an -@

class Huh
  def ~@
    puts "a"
  end
  
  def ~
    puts "b"
  end
end

~Huh.new # => "b"
         # Why? shouldn't this call Huh#~@ and leave Huh#~ for something link h1 ~ h2