From: Ben Vishny <bvishny@...>
Date: 2010-06-06T05:33:00+09:00
Subject: Processing (potentially) nil method without using nested if

Hi all,

really stupid question. How can I evaluate the following code without
using a nested if.. then statement?

if parent.respond_to? "children"
    if parent.children.size != 0
        puts "Has children"
   end
end

Ideally I'd like to do:

if parent.respond_to? "children" && parent.children.size != 0
   puts "Has Children"
end

But I get an error if parent.children is undefined. Isn't there a way of
stopping if the first condition is false?

Thanks,

Vish
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