From: Simon Strandgaard <neoneye@...>
Date: 2007-01-05T19:01:59+09:00
Subject: Re: How can I do this better?

On 1/5/07, Sam Kong <sam.s.kong@gmail.com> wrote:
> I find myself to use the following idiom frequently.
>
> def foo i
>   return @cache[i] if @cache[i]
>   @cache[i] = some_method_that_takes_long_time(i)
> end
>
> I like the post-modifying if statement.
> But I feel uncomfortable with calling @cache[i] twice.
[snip]

how about?

irb(main):001:0> a = nil
=> nil
irb(main):002:0> a ||= 42
=> 42
irb(main):003:0> a ||= 666
=> 42
irb(main):004:0> a
=> 42


-- 
Simon Strandgaard
http://opcoders.com/