From: Robert Klemme <shortcutter@...>
Date: 2007-10-17T15:05:02+09:00
Subject: Re: Compound conditionals in case when statements? Syntax?

On 17.10.2007 01:37, Michael Fellinger wrote:
> On 10/17/07, Randy Kramer <rhkramer@gmail.com> wrote:
>> I need (or want ;-) to do something like the following:
>>
>> when ((/^---\+\+ (.*)/) and (new_record == true))
>>
>> I've tried a lot of variations, but either this just won't work, or I haven't
>> managed to guess the proper syntax.  (I've also tried googling and searching
>> in the pickaxe(2).)
>>
>> Aside: Maybe the compound won't work because one is what the pickaxe calls a
>> condition and the other is a comparison?  But, I'm not sure which is which.
>>
>> If this can't work, I'll try (I've been trying) a nested if statement, but
>> I'll ask about that in my next post. ;-)
> 
> this can't work for the simple reason that the objects given at 'when'
> are being sent the === message with the object in 'case'. In your
> 'when' it's the result of the stuff in closures.
> This generally is the job of 'if', just keep in mind that case/when is
> for matching, if/else is for conditionals.

See Pena's comment: there is another form of 'case' which can be nicely 
used to solve this.

Kind regards

	robert