From: Kevin Nolan <kpnolan@...>
Date: 2008-08-15T04:39:20+09:00
Subject: Re: Best practice for set-and-test idiom?

Tim Hunter wrote:
> Kevin Nolan wrote:
> (snip)
>>    or the compact version:
>> 
>>      val = (ptr = fcn_returning_ptr(...)) ? ptr->ref : DEFAULT
>> 
>> Which, when I translate to Ruby yields (ActiveRecord example):
>> 
>>      unless (ar = Model.find(...)).nil?
>>         val = ar.attribute
>>      else
>>         val = DEFAULT
>> 
>>    or the equivalent expression.
>> 
>> It seems to me that this is very unRuby-like and I don't see any similar
>> usages in any of the code-bases in which I have looked.
>> 
>> Will someone please provide a counter-example?
> 
> Ruby has the ternary ?: operator, too:
> 
> val = (ar = Model.find(...)) ? ar.attribute : DEFAULT

Tim,

I know -- I just omitted it for the sake of brevity. Do you have any 
thoughts about a better, or my ruby-like technique?


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