From: Joel VanderWerf <joelvanderwerf@...>
Date: 2010-02-06T04:45:21+09:00
Subject: Re: when should one use "and" and "or"

botp wrote:
> On Fri, Feb 5, 2010 at 3:14 PM, Brian Candler <b.candler@pobox.com> wrote:
>> No, but it's essentially inherited from perl. These operators have
>> extremely low precedence, so without parens your statement was being
>> parsed as something like
>>
>>  (when x==1) or x==2
>>
>> I think the typical perl use is something like:
> ....
> 
> but brian, i'm still inside the "case" block. can't ruby sense that?

And shouldn't 'when' have the same precedence as 'if'?

At least for 'or', you can use a comma instead:

case
when x==1, x==2; puts "1 or 2"
end

but it doesn't read as well, and there's nothing that works like this 
for 'and'.