Re: [swift-users] for with optional collection?

[Rick Mann via swift-users]

> On Feb 9, 2017, at 13:31 , Saagar Jha <saa...@saagarjha.com> wrote:
> 
> for item in someOptionalCollection ?? [] {
>       item.doSomething()
> }
> 

Thanks, this is probably the closest. Sadly I can't seem to test downcasting 
because Playgrounds just stop working, with no feedback, for this code:

class Foo
{
        init(_ inVal: String) { self.name = inVal }
        
        var name: String
        var desc: String { get { return "Foo \(name)" } }
}

let f = Foo("foo")

class Bar : Foo
{
        var desc: { return "Bar \(name)" }
}

let stuff: [Foo]?// = [Bar("foo"), Bar("bar"), Bar("baz")]
for item in (stuff as? [Bar]) ?? []
{
}

-- 
Rick Mann
rm...@latencyzero.com


_______________________________________________
swift-users mailing list
swift-users@swift.org
https://lists.swift.org/mailman/listinfo/swift-users