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   Paul Cantrell (inthehands@hachyderm.io)'s status on Saturday, 12-Oct-2024 09:25:56 JST Paul Cantrell

   Does Swift not have a built-in / stdlib modulus operator, such that e.g. -5 mod 3 gives 1 (instead of -2, as -5 % 3 does)?

   It’s easy enough to add it, but…given the language’s careful attention to “remainder” versus “modulus” in its named functions and its docs, it really seems like something that should be in the lang!

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     Paul Cantrell (inthehands@hachyderm.io)'s status on Saturday, 12-Oct-2024 09:36:07 JST Paul Cantrell

     in reply to

     • Steve Canon

     @steve
     Fair re the negative modulus, and maybe it should just trap.

     It’s just that my need for modulo outnumbers my need for what % does by, oh, two orders of magnitude easily. Actually, I’m hard-pressed to think of a time I •ever• really wanted what % does instead of modulo.

     Is the euclideanDivision function what you’re talking about in Numerics?

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     Steve Canon (steve@discuss.systems)'s status on Saturday, 12-Oct-2024 09:36:08 JST Steve Canon

     in reply to

     @inthehands No. partially because it’s unclear what people want to happen when the modulus is negative, partially because there’s no compatible division operation. There is one on Numerics main, though, and it’s easy enough to roll your own, as you show.