From: dblack@...
Date: 2002-12-09T11:43:15+09:00
Subject: Re: [YANQ] -yet another (ruby) newbie question -string#concat

Hi --

On Mon, 9 Dec 2002, [iso-8859-1] "Pe�a, Botp" wrote:

> Hello Ruby Friends,
>
> >From now on, I'll prefix my questions w YANQ (yet another (ruby) newbie
> question) so  it would be easier for you to delete (in case :-).

ruby + newbie == nuby :-)

> My YANQotd is regarding string#concat. A sample code and output would be
> good to illustrate:
>
> C:\family\ruby>type a1.rb
> fn = "bot"
> ln = "pen"
> name = fn.concat(ln)
>
> print "first name: ", fn
> puts
> print "last name : ", ln
> puts
> print "full name : ", name
>
> C:\family\ruby>ruby a1.rb
> first name: botpen
> last name : pen
> full name : botpen
>
>
> I noticed that concat modified fn. I looked for other concat methods but
> couldn't find one (but the + op). I was hoping that there would be a concat!
> and concat pair (like chop!/chop and chomp!/chomp).
>
> Maybe string#concat! was deprecated for "+"? My concern is that (as a

String#concat is a synonym for String#<<, and since it modifies the
object, a concat! version wouldn't make sense.  You can indeed use
String#+ if you want to create a new string instead of modifying the
old one.

> newbie), I'm trying to avoid methods with "!" (like chomp!/chop!) so I have
> less to worry/know. My strategy was working and I was actually coding w
> breeze... until I bump.. :-(

I think in the long run that strategy will give you *more* to worry
about :-)  Don't feel you have to avoid ! methods; they're a normal
part of Ruby, and not particularly complicated.


David

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