+1
> Am 03.04.2017 um 10:29 schrieb Daniel Duan via swift-evolution > <[email protected]>: > > I want to retract my nitpickings on argument labels; `all(equal:)` and > `all(match:)` are the best names for these methods. > > things all match condition? > things all equal value? > > If we accept `all` as a term of art (which I think we should), along with > these labels the use site are very readable! > >> On Mar 31, 2017, at 6:38 PM, Daniel Duan via swift-evolution >> <[email protected]> wrote: >> >> nit: should these names be `all(matching)`/`all(equalTo)` per API Design >> Guidelines? >>> On Mar 31, 2017, at 8:28 AM, Ben Cohen via swift-evolution >>> <[email protected]> wrote: >>> >>> Hi, >>> >>> A short proposal for you as part of the algorithms theme. Hopefully >>> non-controversial, aside from the naming of the method and arguments, about >>> which controversy abounds. Online copy here: >>> https://github.com/airspeedswift/swift-evolution/blob/9a778e904c9be8a3692edd19bb757b23c54aacbe/proposals/0162-all-algorithm.md >>> >>> >>> Add an all algorithm to Sequence >>> Proposal: SE-NNNN >>> Authors: Ben Cohen >>> Review Manager: TBD >>> Status: Awaiting review >>> Introduction >>> >>> It is common to want to confirm that every element of a sequence equals a >>> value, or matches a certain criteria. Many implementations of this can be >>> found in use on github. This proposal adds such a method to Sequence. >>> >>> Motivation >>> >>> You can achieve this in Swift 3 with contains by negating both the criteria >>> and the result: >>> >>> // every element is 9 >>> !nums.contains { $0 != 9 } >>> // every element is odd >>> !nums.contains { !isOdd($0) } >>> but these are a readability nightmare. Additionally, developers may not >>> make the leap to realize contains can be used this way, so may hand-roll >>> their own for loop, which could be buggy, or compose other inefficient >>> alternatives: >>> >>> // misses opportunity to bail early >>> nums.reduce(true) { $0.0 && $0.1 == 9 } >>> // the most straw-man travesty I could think of... >>> Set(nums).count == 1 && Set(nums).first == 9 >>> Proposed solution >>> >>> Introduce two algorithms on Sequence which test every element and return >>> true if they match: >>> >>> nums.all(equal: 9) >>> nums.all(match: isOdd) >>> Detailed design >>> > _______________________________________________ > swift-evolution mailing list > [email protected] > https://lists.swift.org/mailman/listinfo/swift-evolution
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