From: dblack@...
Date: 2003-04-27T08:58:36+09:00
Subject: Re: can you guess

Hi --

On Sun, 27 Apr 2003, Tim Bates wrote:

> On Sun, 27 Apr 2003 6:19 am, Brian Candler wrote:
> > As a guess - is it anything to do with the various string notations like
> > %x{...} for execute etc? i.e.
> >
> >     %{args}
> >
> > seems to give the same result.
>
> Yes, as does
>   %;args;
> You can use any character as a delimiter in Ruby, remember? So in the case of
>   % args
> You're using spaces as delimiters. I think. irb does some very strange things
> in this case, depending on whether you put a space after the 'args' or not:
>
> (Replace '_' with space)
> irb(main):027:0> class_String
> irb(main):028:1> def_expand(*args)
> irb(main):029:2> %_args_
> irb(main):030:2> end
> irb(main):031:1> end
>
> Works fine.
>
> irb(main):015:0> class_String
> irb(main):016:1> def_expand(*args)
> irb(main):017:2> %_args
> irb(main):018:2" end
> irb(main):019:2" end
>
> Still thinks it's inside the string, because I haven't used a
> 'closing space' yet.

That's not strange though, is it?  You've sort of contracted to
provide a delimiting space, so it's just waiting for one.  It's
not irb-specific:

$ ruby -e 'puts(%_
> abc
> def
>  )'
_
abc
def

(also using _ for space) (though it would work with literal '_' too
:-)


David

-- 
David Alan Black
home: dblack@superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav