on Thu May 05 2016, David Hart <swift-evolution@swift.org> wrote: > If we are discussing naming changes to reduce, here's my personal opinion: > > * When I first encountered it, I understood exactly what it did because I knew > that term of art. If it was named sequence, I would have been > confused.
Nobody's proposing to rename reduce to sequence, FWIW. > > * If we are discussing name changes, I'd personally vote to change it > to fold. It is the other term of art used for it, and it makes unfold > work. > > David > > On 05 May 2016, at 22:39, Chris Lattner via swift-evolution > <swift-evolution@swift.org> wrote: > > On May 5, 2016, at 1:03 PM, Erica Sadun <er...@ericasadun.com> wrote: > > On May 4, 2016, at 5:50 PM, Chris Lattner via swift-evolution > <swift-evolution@swift.org> wrote: > > Proposal link: > > https://github.com/apple/swift-evolution/blob/master/proposals/0045-scan-takewhile-dropwhile.md > > Sequence.prefix(while:) & Sequence.drop(while:) - These are > *accepted* as specified in revision 3 of the proposal. > > I'm still a little sad we didn't go for `prefix`/`suffix` or `take`/ > `drop` pairs that linguistically matched.Nonetheless I'm gratified > these > are hopping into the language. That said, I'm going to put on my > painters cap to consider selecting some exterior latex for the > feature I > was most looking forward to in this proposal: > > Core team writes: > > unfold(_:applying:) - This addition is *rejected* by the core team > as written, but deserves more discussion in the community, and > potentially could be the subject of a future proposal. The core > team > felt that the utility of this operation is high enough to be worth > including in the standard library, but could not find an > acceptable > name for it. “unfold” is problematic, despite its precedence in > other language, because Swift calls the corresponding operation > “reduce” and not “fold”. No one could get excited about > “unreduce”. > “iterate” was also considered, but a noun is more appropriate than > an verb in this case. Given the lack of a good name, the core team > preferred to reject to let the community discuss it more. > > A few thoughts: > > * I'm not sure why a noun is more appropriate than a verb. Reduce > isn't > a noun, prefix isn't a noun, drop isn't a noun. > > I’m not a naming guru, but my understanding is that ‘reduce’ was picked > because it was term of art (like map), which is what allowed the misuse > of a > verb. > > One idea that came out of the core team discussion was something like: > > sequence(from: 0) { $0 += 42 } > > Since it returns a sequence. > > -Chris > > _______________________________________________ > swift-evolution mailing list > swift-evolution@swift.org > https://lists.swift.org/mailman/listinfo/swift-evolution > > _______________________________________________ > swift-evolution mailing list > swift-evolution@swift.org > https://lists.swift.org/mailman/listinfo/swift-evolution -- Dave _______________________________________________ swift-evolution mailing list swift-evolution@swift.org https://lists.swift.org/mailman/listinfo/swift-evolution