Re: Mod (%) function in C/Objective-C?
Re: Mod (%) function in C/Objective-C?
- Subject: Re: Mod (%) function in C/Objective-C?
- From: Keary Suska <email@hidden>
- Date: Tue, 12 Aug 2014 08:01:24 -0600
On Aug 12, 2014, at 1:42 AM, Dave <email@hidden> wrote:
>> Maybe my brain isn't working correctly but that doesn't make sense to me. Could you show the output with both x and y shown? Now, you aren't dividing by a negative integer, are you? I believe that is undefined…
Yes, it's my brain. I just needed to see it to make sense of it.
> I’m not doing any division, the function for “myMod” is as I posted:
Well, it is the divisor I was asking about and although you aren't interested in the quotient, you are asking for division to occur.
> If you think of the number as being used as an Index into an NSArray, you can see why a true mod function is better, e.g. -1 gets you the last element, -2 the second from last and so on.
I see that you are interested in a circular index. Most of the time I find myself needing a "remainder" result more than a true modulo, so I use abs(). That definitely won't work when you need the true series.
Keary Suska
Esoteritech, Inc.
"Demystifying technology for your home or business"
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