From: Florian Gilcher <flo@...>
Date: 2008-05-02T23:15:30+09:00
Subject: Re: | versus || Any reason for this issue?

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On May 2, 2008, at 4:01 PM, Iņaki Baz Castillo wrote:

> Hi, why in the second case the non declared "my_var" variable is
> processed but not in the first case?
>
> irb> nil || 2 || my_var
> => 2
>
> irb> nil | 2 | my_var
> NameError: undefined local variable or method `my_var'
>
>
> Of course, I prefer the first case: 2 is already true so there is no
> reason to read the next "my_var". Also, it's not good for performance,
> is it?


| is the bitwise OR and something entirely different from ||. | needs  
to evaluate both Operands while the value of a logical OR (||) is  
known at the moment that one of the Operands is true.

Regards
Florian Gilcher
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