[swift-evolution] Feature proposal: Range operator with step

[Erica Sadun]

> On Apr 5, 2016, at 4:22 PM, Erica Sadun via swift-evolution <swift-evolution at swift.org> wrote:
> 
>> 
>> On Apr 5, 2016, at 4:17 PM, Dave Abrahams via swift-evolution <swift-evolution at swift.org> wrote:
>> 
>> 
>> on Tue Apr 05 2016, Erica Sadun <swift-evolution at swift.org> wrote:
>> 
>>>   On Apr 5, 2016, at 1:54 PM, Dave Abrahams
>>>   <dabrahams at apple.com> wrote:
>>>   IMO this:
>>> 
>>>   (-9...0).reverse()
>>> 
>>>   is better than 
>>> 
>>>   stride(from: 0, to: -10, by: -1)
>>> 
>>>   What do you think?
>>> 
>>> The latter better reflects an author's actual intent. The former depends on
>>> implementation details, which can be hazy, especially, around the edge cases. It
>>> is quicker to read, understand, and verify that the latter is what is
>>> meant.
>> 
>> Except that there seems to be some confusion over what "to:" means, right?
> 
> 
> obviously (0..<-10).by(-2) would be best.
> 
> -- E

or even (0..<(-10)).by(-2)

As much as this looks like a Lisp program, it still improves over the alternatives

-- E



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