From: Paul Brannan <pbrannan@...>
Date: 2003-03-22T01:01:00+09:00
Subject: Re: class level Exception handling

On Fri, Mar 21, 2003 at 01:08:30AM +0900, Xiangrong Fang wrote:
> in the above code, I do a lot of TCP Socket related work in method1
> method2 etc. I would like to return false for all these methods if
> there's any error, can I do better than use a begin/rescue/end for every
> of them?

I'm not convinced this is a good idea, because by eating the exceptions,
a lot of good error information could be lost.  With that in mind, how
about:

  class A
    def handle_exceptions
      begin
        yield
        return true
      rescue
        return false
      end
    end

    def method1
      handle_exceptions do
        puts "just testing"
        raise RuntimeError
      end
    end

    def method2
      handle_exceptions do
        puts "no problem here"
      end
    end
  end

method1 will return false, because in Ruby, the last value evaluated
in a method gets returned.

Paul