From: Holden Glova <dsafari@...>
Date: 2002-02-11T18:49:36+09:00
Subject: Re: handling errors

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On Mon, 11 Feb 2002 22:09, Tobias Reif wrote:
> Hi,
>
> somehow I had this working.
>
> ---
> class Doc
>    def make
>       "Content-type: image/svg+xml\n\n"+
>      '<svg/>'
>      h.l
>    end
> end
>
> doc = Doc.new
>
> begin
>    puts doc.make
> rescue
>    print "Content-type: text/plain\n\n"
>    puts 'myself speaking: ' +$!
> end
> ---
>
> with the erratic fifth line, I get
> ---
> err.rb:6:in `make': undefined local variable or method `h' for
> #<Doc:0x459a9c8>
> (NameError)
>          from err.rb:13
> ---
>
> instead of
> ---
> Content-type: text/plain
>
> myself speaking: [...]
> ---
>
> Tobi

I don't know if you can do that without specifying an exception type? Anyhow 
I have never done it like that. Do you want to rescue any type of exception? 
The code below will do that.

synack@eugene:~$ ruby demo.rb
Content-type: text/plain

myself speaking: undefined local variable or method `h' for #<Doc:0x4025cc5c>

synack@eugene:~$ cat demo.rb
class Doc
   def make
      "Content-type: image/svg+xml\n\n"+
     '<svg/>'
     h.l
   end
end

doc = Doc.new

begin
   puts doc.make
rescue Exception			# <-- Catch all Exceptions
   print "Content-type: text/plain\n\n"
   puts 'myself speaking: ' +$!
end

- -- 
Signed,
Holden Glova
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