I agree with Radek. I find `for i in 5 { doSomething() }` or `for 5 {
doSomething() }` to be very confusing since it is neither close to human
language nor to any common programming language I know of.
I like the idea of giving students a step by step introduction into things, but
this is IMO not the right way/place to do that.
– Cihat
> Am 18.12.2015 um 22:26 schrieb Radosław Pietruszewski via swift-evolution
> <[email protected]>:
>
>> An obvious question is, should it be equivalent to 1...n, or 0..<n?
>
> I think that’s exactly why this isn’t a good idea. The semantics of `for i in
> 5` are not immediately clear at all.
>
> If this was to be a language feature, `repeat 5`, suggested by Chris, seems
> like the least-ambiguous choice.
>
> — Radek
>
>> On 18 Dec 2015, at 22:09, Jacob Bandes-Storch via swift-evolution
>> <[email protected] <mailto:[email protected]>> wrote:
>>
>> This can be done pretty easily, although I think the approach has the
>> potential to cause confusion elsewhere in code. An obvious question is,
>> should it be equivalent to 1...n, or 0..<n?
>>
>> extension Int: SequenceType {
>> public func generate() -> RangeGenerator<Int> {
>> return (0..<self).generate()
>> }
>> }
>>
>> for i in 5 {
>> print("hello \(i)")
>> }
>>
>> Jacob Bandes-Storch
>>
>> On Fri, Dec 18, 2015 at 1:03 PM, Brent Royal-Gordon via swift-evolution
>> <[email protected] <mailto:[email protected]>> wrote:
>> > I’d like to propose an addition of a useful method, especially for
>> > beginners that also makes Swift much more readable in some situations: The
>> > addition of a .times method to Integer type(s).
>>
>> I’ve said it before, but I don’t think `times` is a good solution for
>> learners. It teaches them a form of looping they will never use in practice
>> and does not allow them to practice with ancillary loop skills like `break`
>> and `continue`.
>>
>> I think our best bet is to extend the `for` loop to allow a single number,
>> meaning either `1…n` or `0..<n` (you can argue it either way), and also to
>> allow the `variableName in` part to be omitted, meaning `_ in`. This gives
>> us the pedagogical simplicity of a “do this N times” loop, but couches it in
>> a form where, when the student moves on, more commonly used loop forms are a
>> straightforward extension of that simple case.
>>
>> for 5 { print(“Hello!”) }
>> for i in 5 { print(“Hello \(i)!”) }
>> for i in 10..<20 { print(“Hello \(i)!”) }
>> for i in 10...20 { print(“Hello \(i)!”) }
>>
>> --
>> Brent Royal-Gordon
>> Architechies
>>
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