From: pjb@... (Pascal J. Bourguignon)
Date: 2009-01-27T20:42:52+09:00
Subject: Re: Time Compare

Brian Candler <b.candler@pobox.com> writes:

> Robert Klemme wrote:
>> is_between = now > yesterday and now < tomorrow
>
> Danger danger!!!
>
> irb(main):012:0> foo = 3 > 1 and 3 < 2
> => false
> irb(main):013:0> foo
> => true
>
> 'and' and 'or' have lower precedence even than '=', so it's parsed as
>
>   (foo = 3 > 1) and (3 < 2)
>
> The moral is: don't use these very-low precedence operators unless you 
> really know what you're doing. And even then, use parentheses to be 
> sure. Learned the hard way :-)

That's the second time today I notice that you are required to use
parentheses in Ruby (cf. m(arg){block}).  Would that be a Lots of
Insipid and Stupid Parentheses language?

In anycase, I've got too small a brain to remember such rules, I put
parentheses everywhere.
-- 
__Pascal Bourguignon__