From: Glen Holcomb <damnbigman@...>
Date: 2008-04-05T04:25:04+09:00
Subject: Re: The ||= assignment operator

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On Fri, Apr 4, 2008 at 1:11 PM, Belorion <belorion@gmail.com> wrote:

> It was my understanding that the ||= assignment operator assigned the
> value
> on the right-hand side if and only if the left hand side did not already
> have a value:
>
> irb(main):001:0> x = true
> => true
> irb(main):002:0> x ||= "ruby"
> => true
> irb(main):003:0> x
> => true
> And, likewise, with nil:
>
> irb(main):014:0> x = nil
> => nil
> irb(main):015:0> x ||= "ruby"
> => "ruby"
> irb(main):016:0> x
> => "ruby"
> However, I do not understand this behavior:
>
> irb(main):019:0> x = false
> => false
> irb(main):020:0> x ||= "ruby"
> => "ruby"
> irb(main):021:0> x
> => "ruby"
>
>
> We know that false != nil, and yet the ||= will assign if the left hand
> side
> is false?
>
> regards,
> Matt
>

Nope ||= will assign if nil or false.

-- 
"Hey brother Christian with your high and mighty errand, Your actions speak
so loud, I can't hear a word you're saying."

-Greg Graffin (Bad Religion)

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