From: matz@... (Yukihiro Matsumoto)
Date: 2001-08-08T07:39:58+09:00
Subject: [ruby-talk:19315] Re: how to "die" in Ruby

Hi,

In message "[ruby-talk:19310] how to "die" in Ruby"
    on 01/08/08, markus jais <info@mjais.de> writes:
|
|hi,
|in Perl I can write
|open(FH, "/root/.bashrc") or die "error opening file: $!";

|is there another way in Ruby how to do this.
|I must say, that I like the ruby way with the exceptions,
|I was just curious if there is another (maybe shorter) way 
|to do this.

The shortest way is

 f = open("/root/.bashrc")
 # prints:
 #  foo.rb:1:in `open': No such file or directory - "/root/.bashrc" (Errno::ENOENT)

If you want to raise an exception with arbitrary message,

 begin
   f = open("/root2/.bashrc")
 rescue
   raise "error opening file: #{$!}"
 end

or alternatively

 f = open("/root/.bashrc") rescue raise "error opening file: #{$!}"

If you want to exit directly,

 begin
   f = open("/root2/.bashrc")
 rescue
   puts $!
   exit 1
 end

TMTOWTDI

							matz.