Is there any way we can add function/operator equivalence to the language? Perhaps some kind of 'operators' global object with symbol fields matching operator string to functions/constraints? -------------------------- Dammit babies, you've got to be kind.
On Thu, 15 Aug 2019 at 08:47, Andrea Giammarchi <andrea.giammar...@gmail.com> wrote: > FWIW another disadvantage is that operators cannot be polyfilled, so it'll > take forever for those not using transpilers to adopt these, while having a > `Math,mod` would work right away > > On Thu, Aug 15, 2019 at 8:40 AM Claude Pache <claude.pa...@gmail.com> > wrote: > >> >> >> Le 12 août 2019 à 22:00, Matthew Morgan <mmm...@zips.uakron.edu> a écrit >> : >> >> JS needs a modulo operator. It currently has the remainder operator `%` >> which works in most cases except for negative values. I believe the the >> `%%` would work great and be easy to remember. >> >> let x = (-13) %% 64; >> is equivalent to >> let x = ((-13 % 64) + 64) % 64; >> >> >> Is there a strong advantage of an `%%` operator over a `Math.mod()` >> function? There is the precedent of the `**` operator implemented as >> alternative of `Math.pow()` few years ago. It would be interesting to hear >> the feedback of those that use regularly powers, whether the benefit was >> clear (personally, I almost never use either `Math.pow()` or `**`, so that >> I can’t say anything). >> >> At least one disadvantage of an operator over a function, is that you >> have to think about precedence. The problem is exacerbated in JS, because >> (following some other languages) the unary minus has an uncanny high >> precedence level, confusingly very different than the one of the binary >> minus; so that, after having designed `**`, it was realised at the last >> minute that `-a**b` would be dumbly interpreted as `(-a)**b` instead of >> `-(a**b)` or `0-a**b`, as anybody who would be likely to actually use the >> operator would expect. (That particular issue was resolved in a hurry by >> making the parenthesis-left form a syntax error.) >> >> —Claude >> >> _______________________________________________ >> es-discuss mailing list >> es-discuss@mozilla.org >> https://mail.mozilla.org/listinfo/es-discuss >> > _______________________________________________ > es-discuss mailing list > es-discuss@mozilla.org > https://mail.mozilla.org/listinfo/es-discuss >
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