From: Joel Wilsson <siigron@...>
Date: 2001-08-15T03:13:56+09:00
Subject: [ruby-talk:19715] and in postconditions

Hi everyone,
           I've found something very strange. "and" doesn't
seem to do what I expect it to do when used with postconditions.
In Perl, however, it does.

$ cat test.pl
sub test($) {
  my $i = shift;
  print "TRUE!\n" and return true if ($i > 10);
  print "FALSE!\n";
  return false;
}
print test(20), "\n";
print test(2), "\n";

$ perl test.pl
TRUE!
true
FALSE!
false

$ cat test.rb
def test i
  print "TRUE!\n" and return true if (i > 10)
  print "FALSE!\n"
  return false
end
print "#{test(20)}\n"
print "#{test(2)}\n"

$ ruby test.rb
TRUE!
FALSE!
false
FALSE!
false

$ ruby -v
ruby 1.6.4 (2001-07-31) [i386-freebsd5.0]

Could someone please explain why Ruby behaves like this?
Is there a reason for it, or is it a bug?

And matz, thank you for a wonderful language. It's the
only language I actually enjoy rewriting and restructuring
code in, because I always find new ways to improve the code
by using language features I didn't previously understand
what they were there for (or how powerful they were).

Thanks,
      Joel Wilsson