Function.prototype is no-op (run Function.prototype.toString() for more information)
On Wed, Aug 10, 2016 at 12:03 PM, Tiddo Langerak <[email protected]> wrote: > I think this is more about improving readability than saving a few > characters. > > > On 08/10/2016 11:10 AM, Isiah Meadows wrote: > > I'll note that it's longer than just typing them out manually (and close > if they're aliased): > > ```js > Function.IDENTITY > IDENTITY > x => x > > Function.NOOP > NOOP > () => {} > ``` > > Not sure if it adds anything. > > On Tue, Aug 9, 2016, 14:44 Eli Perelman < <[email protected]> > [email protected]> wrote: > >> I'm not sure if something like this has been proposed before, but I often >> find myself declaring constants for the identity function and the no-op >> function. I think it would be useful to have constants available on >> Function containing these values. For example `Function.IDENTITY` and >> `Function.NOOP`. Essentially these constants would map to: >> >> ```js >> Function.IDENTITY = (a) => a; >> Function.NOOP = () => null; // or: >> Function.NOOP = () => {}; >> ``` >> >> These could then be used in places where non-user-controlled APIs need >> default functions need to be executed, or as placeholders for default >> values that may be executed before a function has been supplied. For >> example: >> >> ```js >> // third-party API requires a callback or throws, but no functionality >> really needs to done: >> thirdParty.action(Function.NOOP); >> >> // Function needs a default which *may* execute prior to having a >> different one specified (contrived): >> const action = (handler = Function.IDENTITY, value = 10) => >> handler(value); >> ``` >> >> Thoughts? Seems like something simple with positive value. Thanks! >> >> Eli Perelman >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> > > > _______________________________________________ > es-discuss mailing > [email protected]https://mail.mozilla.org/listinfo/es-discuss > > > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > >
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