From: Jeff <cohen.jeff@...>
Date: 2008-10-30T22:39:40+09:00
Subject: Re: Question about case statement and lambdas

On Oct 29, 10:47 pm, "David A. Black" <dbl...@rubypal.com> wrote:

> Expanding on Botp's point about options being changed:
>
> The problem is that if options is a Proc the first time you call the
> lambda, it isn't the second time. It's still whatever got assigned to
> it.
>
> Say options.call(*args) returns "Hello!". The second time you call the
> lambda, options will be "Hello!", and not a Proc. "Hello!" will then
> be sent to Scope.new, which is probably not going to be right.
>
> That's why you need a temporary variable or an inlined conditional.
> You don't want to trample the options variable itself, since it's the
> only place where the original options are stored.
>
> David
>
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Ah!  Thanks for that explanation!  Makes perfect sense now.

Jeff

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