Woudn't Array.prototype.all satisfy those use cases, they run until a falsy value is returned.
-- Michael J. Ryan - http://tracker1.info On Thu, Jul 6, 2017 at 6:51 AM, Naveen Chawla <[email protected]> wrote: > Suitable for that would be an "until" function that returns an array with > all elements of the target array until a condition is met (which can then > be followed by a chained call to forEach/forEvery), not "forEach" / > "forEvery" as such. Reason: readability. The counterpart could be an > "after" function which returns an array with all elements after the first > element that satisfies a condition. (Maybe even "untilInclusive"/"from" for > the inclusive versions too). > > On 6 July 2017 at 18:21, Sebastian Malton <[email protected]> wrote: > >> Would allowing for each to have the following two properties also help? >> >> 1. Returning a falsy value ends the chain and the next element will not >> be called >> 2. Ability to pass in a call back as parameter 4 and if present will stop >> the next element from being iterated over until the callback is called with >> a truthy value (falsey also ends) >> >> >> >> *From:* [email protected] >> *Sent:* July 6, 2017 8:44 AM >> *To:* [email protected] >> *Subject:* Re: Re: Return value of forEach >> >> In that case, there should be a new function: >> >> "forEvery" (or "forEachAndReturn" or "each" or whatever) >> >> that does exactly the same as "forEach" but returns the array. >> >> This is a much needed feature for those of us that don't want to create a >> new array on each invocation but still have the ability to transform the >> contents of the array (or do some other processing) from within a .sort / >> .map / .filter etc. chain. >> >> Otherwise, in complicated transformations, we have to end the chain, >> perform the forEach separately, and then resume the chain, making the code >> more messy. Sort is an example of a function that already allows mutation >> of the existing array and returns it, so this would be nothing >> extraordinary for ES. >> > > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > >
_______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
