Re: getFirstDayOfMonth()

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From	Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups	comp.lang.c
Subject	Re: getFirstDayOfMonth()
Date	Thu, 14 Mar 2024 15:57:54 -0700
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Michael S <already5chosen@yahoo.com> writes:

> On Mon, 4 Mar 2024 21:21:25 -0000 (UTC)
> Lew Pitcher <lew.pitcher@digitalfreehold.ca> wrote:
[...]
>> If you want to /guarantee/ that the return value of strcmp()
>> is -1, 0, or +1 (for "less than", "equal to", or "greater than")
>> you will have to process the return value with something like
>>
>>   /*
>>   ** Returns -1 if argument < 0, 0 if argument == 0, 1 if argument > 0
>>   */
>>   int iSignOf(int valu)
>>   {
>>     return ((valu > 0) - (valu < 0));
>>   }
>
> Too tricky to my liking.
> I'd rather write straight-forward code and let compiler to figure
> out the best sequence.
>
> int iSignOf(int val)
> {
>   if (val < 0)
>     return -1;
>   if (val > 0)
>     return +1;
>    return 0;
> }

I've seen the idiomatic form before, and my reaction to it is
more of it being overly cute than overly tricky.  That said,
it is a bit on the tricky side;  even so, I'm not sure the cure
suggested is much better than the disease.  I would simply write
a single return statement:

    return  val < 0 ? -1  :  val > 0 ? 1  : 0;

(possibly condensed to take advantage of the 0/1 result of the
"greater than" operator for non-negative operands).

I suppose some people prefer the multiple return form to the ?:
form, although I'm not sure why except perhaps as a carryover
from earlier experience.

Thread

getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-01 03:48 +0000
  Re: getFirstDayOfMonth() gazelle@shell.xmission.com (Kenny McCormack) - 2024-03-01 15:39 +0000
    Re: getFirstDayOfMonth() Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-03-01 17:12 +0100
      Re: getFirstDayOfMonth() Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-03-01 08:28 -0800
        Re: getFirstDayOfMonth() Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-03-01 17:33 +0100
          Re: getFirstDayOfMonth() Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-03-01 17:37 +0100
            Re: getFirstDayOfMonth() Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-03-01 10:34 -0800
              Re: getFirstDayOfMonth() Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-03-01 22:03 +0100
        Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-01 17:20 +0000
    Re: getFirstDayOfMonth() scott@slp53.sl.home (Scott Lurndal) - 2024-03-01 16:47 +0000
    Re: getFirstDayOfMonth() Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-03-01 17:56 +0100
    Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-01 17:18 +0000
    Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-01 20:47 +0000
      Re: getFirstDayOfMonth() scott@slp53.sl.home (Scott Lurndal) - 2024-03-01 21:38 +0000
        Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-01 21:50 +0000
          Re: getFirstDayOfMonth() Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-03 09:52 -0800
        Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-02 00:00 +0000
          Re: getFirstDayOfMonth() scott@slp53.sl.home (Scott Lurndal) - 2024-03-02 14:46 +0000
            Re: getFirstDayOfMonth() Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-03-02 16:41 +0100
            Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-02 19:59 +0000
              Re: getFirstDayOfMonth() Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-03-02 22:14 +0100
                Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-04 18:08 +0000
                Re: getFirstDayOfMonth() Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-03-05 03:03 +0100
              Re: getFirstDayOfMonth() Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-03-02 14:22 -0800
                Re: getFirstDayOfMonth() Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-03-03 15:43 +0100
                Re: getFirstDayOfMonth() David Brown <david.brown@hesbynett.no> - 2024-03-03 18:45 +0100
                Re: getFirstDayOfMonth() Kaz Kylheku <433-929-6894@kylheku.com> - 2024-03-03 18:42 +0000
                Re: getFirstDayOfMonth() David Brown <david.brown@hesbynett.no> - 2024-03-04 09:49 +0100
                Re: getFirstDayOfMonth() Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-03-04 11:31 +0000
                Re: getFirstDayOfMonth() Richard Harnden <richard.nospam@gmail.invalid> - 2024-03-04 14:23 +0000
                Re: getFirstDayOfMonth() Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-03-04 17:27 +0100
                Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-04 17:34 +0000
                Re: getFirstDayOfMonth() scott@slp53.sl.home (Scott Lurndal) - 2024-03-04 17:40 +0000
                Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-04 18:11 +0000
                Re: getFirstDayOfMonth() scott@slp53.sl.home (Scott Lurndal) - 2024-03-04 18:26 +0000
                Re: getFirstDayOfMonth() Kaz Kylheku <433-929-6894@kylheku.com> - 2024-03-04 18:30 +0000
                Re: getFirstDayOfMonth() scott@slp53.sl.home (Scott Lurndal) - 2024-03-04 19:01 +0000
                Re: getFirstDayOfMonth() Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-03-05 03:09 +0100
                Re: getFirstDayOfMonth() scott@slp53.sl.home (Scott Lurndal) - 2024-03-05 15:06 +0000
                Re: getFirstDayOfMonth() Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-03-05 02:56 +0100
                Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-05 02:49 +0000
                Re: getFirstDayOfMonth() Mark Bourne <nntp.mbourne@spamgourmet.com> - 2024-03-06 20:40 +0000
                Re: getFirstDayOfMonth() scott@slp53.sl.home (Scott Lurndal) - 2024-03-06 20:54 +0000
                Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-04 17:26 +0000
                Re: getFirstDayOfMonth() scott@slp53.sl.home (Scott Lurndal) - 2024-03-04 17:34 +0000
                Re: getFirstDayOfMonth() Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-03-04 10:07 -0800
                Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-04 23:47 +0000
                Re: getFirstDayOfMonth() Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-03-04 16:10 -0800
                Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-05 00:12 +0000
                [OT] Re: getFirstDayOfMonth() Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-03-05 03:18 +0100
                Re: [OT] Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-05 02:55 +0000
                Re: getFirstDayOfMonth() scott@slp53.sl.home (Scott Lurndal) - 2024-03-05 15:03 +0000
                Re: getFirstDayOfMonth() Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-03-05 13:25 -0800
                Re: getFirstDayOfMonth() Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2024-03-04 21:21 +0000
                Re: getFirstDayOfMonth() Michael S <already5chosen@yahoo.com> - 2024-03-05 00:37 +0200
                Re: getFirstDayOfMonth() Michael S <already5chosen@yahoo.com> - 2024-03-05 11:41 +0200
                Re: getFirstDayOfMonth() Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-14 15:57 -0700
                Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-04 23:35 +0000
                Re: getFirstDayOfMonth() Janis Papanagnou <janis_papanagnou+ng@hotmail.com> - 2024-03-05 03:20 +0100
              Re: getFirstDayOfMonth() James Kuyper <jameskuyper@alumni.caltech.edu> - 2024-03-03 04:06 -0500
                Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-04 18:21 +0000
                Re: getFirstDayOfMonth() James Kuyper <jameskuyper@alumni.caltech.edu> - 2024-03-04 14:42 -0500
                Re: getFirstDayOfMonth() Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-03-04 14:50 -0800
                Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-05 00:40 +0000
                Re: getFirstDayOfMonth() Kaz Kylheku <433-929-6894@kylheku.com> - 2024-03-05 01:27 +0000
                Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-05 02:40 +0000
                Re: getFirstDayOfMonth() scott@slp53.sl.home (Scott Lurndal) - 2024-03-05 15:05 +0000
                Re: getFirstDayOfMonth() Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-03-04 17:39 -0800
                Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-05 02:43 +0000
                Re: getFirstDayOfMonth() Michael S <already5chosen@yahoo.com> - 2024-03-05 01:08 +0200
                Re: getFirstDayOfMonth() porkchop@invalid.foo (Mike Sanders) - 2024-03-05 00:18 +0000
                Re: getFirstDayOfMonth() Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-03-04 16:33 -0800
              Re: getFirstDayOfMonth() scott@slp53.sl.home (Scott Lurndal) - 2024-03-03 15:24 +0000
                Re: getFirstDayOfMonth() Michael S <already5chosen@yahoo.com> - 2024-03-03 20:20 +0200
                Re: getFirstDayOfMonth() scott@slp53.sl.home (Scott Lurndal) - 2024-03-03 18:56 +0000
            Re: getFirstDayOfMonth() Mark Bourne <nntp.mbourne@spamgourmet.com> - 2024-03-03 13:17 +0000
    Re: getFirstDayOfMonth() jak <nospam@please.ty> - 2024-03-02 02:49 +0100
      Re: getFirstDayOfMonth() Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-03 09:47 -0800
        Re: getFirstDayOfMonth() jak <nospam@please.ty> - 2024-03-04 02:26 +0100
      Re: getFirstDayOfMonth() Peter 'Shaggy' Haywood <phaywood@alphalink.com.au> - 2024-03-05 14:03 +1100
        Re: getFirstDayOfMonth() bart <bc@freeuk.com> - 2024-03-05 13:19 +0000
          Re: getFirstDayOfMonth() jak <nospam@please.ty> - 2024-03-13 05:40 +0100
            Re: getFirstDayOfMonth() jak <nospam@please.ty> - 2024-03-13 06:01 +0100
              Re: getFirstDayOfMonth() Spiros Bousbouras <spibou@gmail.com> - 2024-03-13 13:38 +0000
                Re: getFirstDayOfMonth() Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-03-13 08:47 -0700
                Re: getFirstDayOfMonth() Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-03-13 09:11 -0700
              Re: getFirstDayOfMonth() Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-03-13 07:36 -0700
                Re: getFirstDayOfMonth() Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-03-14 19:56 -0700
    Re: getFirstDayOfMonth() Kaz Kylheku <433-929-6894@kylheku.com> - 2024-03-02 03:44 +0000
      Re: getFirstDayOfMonth() Peter 'Shaggy' Haywood <phaywood@alphalink.com.au> - 2024-03-05 14:07 +1100
      Re: getFirstDayOfMonth() gazelle@shell.xmission.com (Kenny McCormack) - 2024-03-05 13:30 +0000

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