From: Thorsten Haude <ruby@...>
Date: 2002-04-22T04:50:40+09:00
Subject: Re: Novice: Each and p

Moin,

* Armin Roehrl <armin@approximity.com> [02-04-21 17:28]:
>	judging from the email address you might 
>be abloe to read German:
Most of the times, yes.

>http://approximity.com/rubybuch/
Looks good, but if anything, it increased my problems. If I try to
execute this file:
- - - Schnipp - - -
#!  /usr/bin/ruby -w
#   
#   This is free software; you can redistribute and/or modify it under the
#   the terms of version 2 the GNU General Public License as published by
#   the Free Software Foundation. See http://www.gnu.org/copyleft/gpl.html

File.open("/home/yooden/.mail/keywords") { |file|
  file.each_line { |line|
    print line if line =~ /Ruby/
  end
}
- - - Schnapp - - -
I get a parse error at line ten. This is an example from your book, so
I'm afraid something is wrong with my setup.
    ruby 1.6.3 (2001-03-19) [i686-linux]
Is there a standard way to verify a sane environment?

>About "each" look at
>http://www.approximity.com/rubybuch2/node24_main.html
>and especially read "Iteratoren".
The problem I had was more in the two |'s. What exactly is the meaning
of these? Do they just mean "Here's the name of whatever I iterate
upon"? Is there any side effect, anything more to know?
The reason I wonder is simply that this looks unusual to me.

>If not, look at the excellent 
>online book by the pragmatic programmers:
>http://www.rubycentral.com/book/index.html
I had a look at this, but I couldn't find anything directly related to
my problems. And there's no index.

>A quick way to get info on let's say 'p'
>is to use ri.
Great tip! I'm sure I will use this once or twice in the future.

Thanks for your help!

Thorsten
-- 
As long as people will accept crap, it will
be financially profitable to dispense it.
	- Dick Cavett