From: ts <decoux@...>
Date: 2002-11-19T23:03:31+09:00
Subject: Re: begin/end doesn't behave as expected


 For the original message, which is not in [ruby-talk]

T> On Tue, 19 Nov 2002 10:25:04 GMT, Tim Bates <news@bates.id.au> wrote:
>>Why doesn't this snippet of code do what I expect it to?
>>
>>out = "<a href=\""
>>out << begin
>>        "error.rb"
>>        "rules.rb" if rule.instance_of? Rule
>>        "dead.rb" if rule.instance_of? DeadRule
>>        "proposals.rb" if rule.instance_of? Proposal
>>        page.to_s unless page.nil?
>>end

 The block return the value of the last expression which in this case is 

    page.to_s unless page.nil?

  i.e.

    unless page.nil?
       page.to_s
    else
       nil
    end

 because probably (???) page is nil, it return the value of the `else' part

>>>>> "T" == Tim Hunter <Tim.Hunter@sas.com> writes:

T> I think a case statement will do what you want here..

 yes


Guy Decoux