[swift-evolution] Proposal: Add .times method to Integer type

[肇鑫]

I think this is easy to implement yourself if you want that.

extension Int {
    func times(@autoclosure closure: ()->()) {
        for _ in 1 ... self {
            closure()
        }
    }
}

let a = 5
5.times(print("good luck!"))

zhaoxin

On Sat, Jan 9, 2016 at 8:52 PM, Cihat Gündüz <swift-evolution at swift.org>
wrote:

> Just an update to my thoughts about the times method in the meantime:
>
> Currently I’m using my HandySwift
> <https://github.com/Flinesoft/HandySwift> framework to include a `.times`
> method for my own usage and I’m happy that way for now – although that
> solution doesn’t allow for control flow statements. I still think it is a
> useful feature to be added to the language but I also agree with Chris that
> `repeat` should be in the name somewhere, so speaking about the syntax the
> following would be *my new proposal*:
>
> `repeat 5 times { /* code */ }`
>
> Also somebody here asked for *use cases* and here’s one from the
> HandySwift framework where I implemented it itself (source
> <https://github.com/Flinesoft/HandySwift/blob/develop/Sources/Extensions/ArrayExtension.swift>
> ):
>
> public extension Array {
>     public var sample: Element? {
>         get {
>             if self.count > 0 {
>                 let randomIndex = self.startIndex.advancedBy(Int(randomBelow:
> self.count))
>                 return self[randomIndex]
>             }
>             return nil
>         }
>     }
>
>
>     public func sample(size size: Int) -> [Element]? {
>         if self.count > 0 {
>             var sampleElements: [Element] = []
>             size.times { // <== <== <== <== <== times method used here <==
> <== <== <== <==
>                 sampleElements.append(self.sample!)
>             }
>             return sampleElements
>         }
>         return nil
>     }
> }
>
> Am 21.12.2015 um 17:00 schrieb Stephen Celis via swift-evolution <
> swift-evolution at swift.org>:
>
> Just another -1. While I appreciated it in Ruby, I don't think it belongs
> in the Swift standard library at this time. If closures could be annotated
> as break/continue-able, and if the standard library started grew a lot—as
> Ruby's did—then maybe (I'd prefer the former and hold off on the latter,
> though).
>
> In the meantime, "repeat 5 { /* do something */ }" seems better to me.
>
> Stephen
>
> On Dec 20, 2015, at 9:32 PM, T.J. Usiyan via swift-evolution <
> swift-evolution at swift.org> wrote:
>
> -1 from me. It is simple enough for an extension and provides little
> benefit as a standard library inclusion.
>
> On Sun, Dec 20, 2015 at 9:10 PM, Howard Lovatt via swift-evolution <
> swift-evolution at swift.org> wrote:
>
>> +1 to 5.times{stuff} from me. I much prefer library functions to language
>> extensions.
>>
>>   -- Howard.
>>
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-- 

Owen Zhao
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