* Re: [gentoo-user] Portage 2.2
@ 2013-07-24 15:26 99% ` Michael Orlitzky
0 siblings, 0 replies; 1+ results
From: Michael Orlitzky @ 2013-07-24 15:26 UTC (permalink / raw
To: gentoo-user
On 07/24/2013 09:27 AM, Alan McKinnon wrote:
>
> I think it's the former. But I've been known to be wrong on things
> (lately, more often than not...)
>
> Just looked on The Google, and there's no consensus I can find. Best
> advice seems to be that union and difference are equal precedence so the
> expression is evaluated left to right.
>
> Hence it's the former :-)
You can rewrite (A \\ B) as (A && !B), giving you one less case to worry
about.
But, some people (most notably, programming languages) assign a higher
priority to intersection (&&) than they do to union (||). Of course,
mathematically, they should probably have the same priority, so many
people do the left-to-right thing.
So in practice, you'd better use parentheses if you want anyone to know
WTF you're talking about.
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2013-07-24 10:00 [gentoo-user] Portage 2.2 Pavel Volkov
2013-07-24 10:17 ` Neil Bothwick
2013-07-24 10:46 ` Alan McKinnon
2013-07-24 13:20 ` Neil Bothwick
2013-07-24 13:27 ` Alan McKinnon
2013-07-24 15:26 99% ` Michael Orlitzky
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