From: ts <decoux@...>
Date: 2001-08-01T13:45:57+09:00
Subject: [ruby-talk:18933] Re: notes from a Ruby newbie

>>>>> "N" == Ned Konz <ned@bike-nomad.com> writes:

N> a = 0
N> a ||= 3
N> doesn't work but doesn't complain. Even though:

 No, it work. Like you have seen 0 is not false.

N> a.respond_to?('||=')  returns false. Why doesn't it complain?

 ||= is not a method, and || is an operator

N> Surprise! 0 isn't false, but the ||= operator doesn't complain about the 
N> non-Boolean receiver like it would in Smalltalk.
N> ---------
N> p = Proc.new { |a| a }
N> p.call(1, 2)      # => [1,2]

N> Surprise! The list turned into an Array!

 Try

  a = 1, 2
  p a


N> I would have either expected a warning or the second parameter to be ignored.

N> If you call a method with the wrong number of arguments, you get an error 
N> message. But not a Proc.

 a Proc is not a Method

N> p = Proc.new { |a,*b| a }
N> p.call(1,2)   # => 1

  a, *b = 1, 2
  p a

p.s.:

 try to forget perl ...


Guy Decoux