From: Chris Olive <colive@...>
Date: 2001-10-23T08:50:24+09:00
Subject: [ruby-talk:23006] Re: Newbie: Ruby equiv for Perl while (<>)???

Thanks all.  I discovered the -n switch shortly after submitting my question
to Usenet.  (That's always the quickest way for me to find anything: submit
the question, and then I find it immediately thereafter...)

The ARGF object is nice too.  I'll have to use that too.

Been writing Ruby pretty much everyday, when I can.  It totally rocks...  I
just need more exposure to all the classes and methods available; that's the
only hangup.  I'm converting to Ruby; sorry Perl. (Though I will probably
still use Perl alot since the rest of the world still doesn't seem to know
about Ruby -- a check on Monster.Com for Ruby jobs turned up one company
that mentioned it.  One.)

I have yet to see whether there is MySQL support for this...  That would be
a big issue for me too...

chris
-----
Chris Olive
colive@NOSPAM.technologEase.com

"David Alan Black" <dblack@candle.superlink.net> wrote in message
news:Pine.LNX.4.30.0110210742510.4940-100000@candle.superlink.net...
> Hello --
>
> On Sun, 21 Oct 2001, Michael Neumann wrote:
>
> > David Alan Black wrote:
> > >
> > > > $ perl -e 'while (<>) { if (/^\d/) { print "Starts with digit\n" }
else
> > > > { print "Nope\n" } }'
> > >
> > > You could do:
> > >
> > > $ ruby -we 'while gets; puts(/^\d/ && "Starts with digit" || "Nope");
end'
> > >
> > > or if you want to give your fingers more exercise (and see a couple of
> > > other little Ruby things in action):
> > >
> > > $ ruby -we 'while gets; puts begin if /^\d/ then "Starts with digit" \
> > >             else "Nope" end end end'
> > >
> >
> > Using the -n (or -p) option, you can ommit the while-loop:
> >
> >   $ ruby -ne 'puts /^\d/ ? "Starts with digit" : "Nope"'
> >
> > With -p option (prints out $_ in each iteration):
> >
> >   $ ruby -pe '$_ = /^\d/ ? "Starts with digit" : "Nope"'
>
> Interesting!  At first I thought the = was supposed to be =~, but now
> I get it :-)
>
> The only thing is that you'd need an 'l' switch in there too (or stick
> \n's on the strings).)
>
>
> David
>
> --
> David Alan Black
> home: dblack@candle.superlink.net
> work: blackdav@shu.edu
> Web:  http://pirate.shu.edu/~blackdav
>
>
>