From: Yossef Mendelssohn <ymendel@...>
Date: 2008-05-15T03:03:37+09:00
Subject: Re: anding statements.

On May 14, 12:28 pm, "Kyle Schmitt" <kyleaschm...@gmail.com> wrote:
> Mac,
>       If your two arguments were methods however, and the first one
> succeeded, wouldn't you expect it to execute the second?

The problem is that puts returns nil, which causes the boolean logic
to short-circuit and not even bother with the second.

I take that back. *A* problem is that puts returns nil. *The* problem
is that you're trying to do too much on one line.

    if x % 2 == 0
      puts 'even'
      return false
    end

It's possible to use 'and' and 'or' and post-condition (statement
modification) 'if' or 'unless' for clever flow control, but it often
turns out messier-looking than you think.

At least you weren't trying something like

    x % 2 == 0 and puts 'even'

> On Wed, May 14, 2008 at 12:17 PM, Michael Linfield
>
> <globyy3...@hotmail.com> wrote:
> > Consider the following:
>
> >  x = 'word'
> >  z = nil
>
> >  test = x && z       # test == nil
> >  test = x and z      # test == 'word'
> >  test = (x and z)    # test == nil
>
> >  Regards,
>
> >  - Mac
> >  --
> >  Posted viahttp://www.ruby-forum.com/.

--
-yossef