[swift-users] for with optional collection?

[Jeff Kelley]

You can do something like this:

someOptionalCollection?.forEach { item in
	item.doSomething()
}

Or this:

(someOptionalCollection as? [SomeType])?.forEach { item in
	item.doSomething()
}

Jeff Kelley

SlaunchaMan at gmail.com | @SlaunchaMan <https://twitter.com/SlaunchaMan> | jeffkelley.org <http://jeffkelley.org/>
> On Feb 9, 2017, at 4:26 PM, Rick Mann via swift-users <swift-users at swift.org> wrote:
> 
> Is there any concise way to write the following?
> 
> if let collection = someOptionalCollection
> {
>    for item in collection
>    {
>    }
> }
> 
> I can imagine more complicated things, too:
> 
> if let collection = someOptionalCollection as? [SomeType]
> {
>    for item in collection
>    {
>    }
> }
> 
> It would be nice to be able to just attempt to iterate on an optional collection (or Sequence?) and not have to write the enclosing if block
> 
> Thanks!
> 
> -- 
> Rick Mann
> rmann at latencyzero.com
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