[swift-evolution] Proposal: Add function SequenceType.find()
Thorsten Seitz
tseitz42 at icloud.com
Thu Feb 18 15:01:07 CST 2016
> Am 18.02.2016 um 20:36 schrieb Trent Nadeau via swift-evolution <swift-evolution at swift.org>:
>
> I would prefer a label on the first parameter, since you're not finding the NSButton type but instead elements having the type of NSButton.
>
> subviews.find(havingType: NSButton.self, matching: { $0.state == NSOnState })
To comply with the guidelines I would expect a phrase like
subviews.findElement(havingType: NSButton.self, matching: { $0.state == NSOnState })
subviews.find(instanceOf: NSButton.self, matching: { $0.state == NSOnState })
-Thorsten
>
>> On Thu, Feb 18, 2016 at 4:37 AM, Marco Masser via swift-evolution <swift-evolution at swift.org> wrote:
>>
>>> On 2016-02-18, at 00:46, Kevin Ballard via swift-evolution <swift-evolution at swift.org> wrote:
>>>
>>> Alternatively you can write
>>>
>>> subviews.lazy.flatMap({ $0 as? NSButton }).find({ $0.state == NSOnState })
>>
>> Just to reiterate my point: I very much prefer the version without any casts. I just think this is much clearer and doesn’t put the burden of thinking about accidental memory and speed overhead (when forgetting the “lazy”) on the caller every time:
>>
>> subviews.find(NSButton.self, matching: { $0.state == NSOnState })
>>
>> Also, there’s the goal of Swift being easy to learn. Which line do you think is easier to explain to newcomers?
>>
>> _______________________________________________
>> swift-evolution mailing list
>> swift-evolution at swift.org
>> https://lists.swift.org/mailman/listinfo/swift-evolution
>>
>
>
>
> --
> Trent Nadeau
> _______________________________________________
> swift-evolution mailing list
> swift-evolution at swift.org
> https://lists.swift.org/mailman/listinfo/swift-evolution
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.swift.org/pipermail/swift-evolution/attachments/20160218/d096b3d7/attachment.html>
More information about the swift-evolution
mailing list