> Also note that there's a typo in the second example:
>
> for view in sequence(initial: someView, next: { $0.
> superview }) {
>
> // someView, someView.superview, someView.superview.superview, ...
>
> }
>
>
> should be:
>
> for view in sequence(state: someView, next: { $0.
> superview }) {
>
> // someView, someView.superview, someView.superview.superview, ...
>
> }
I don't think these are mistakes—in each iteration of the loop, $0 is supposed
to be the view from the previous iteration.
If you wanted an example using `state`, here's one which is roughly equivalent
to `stride(from: 1.0, to: 2.0, by: 0.1)`, using a non-error-accumulating
algorithm:
let start = 1.0
let end = 2.0
let distance = 0.1
for color in sequence(state: -1.0, next: { $0 += 1; let next = start +
$0 * distance; return next < end ? next : nil }) {
…
}
--
Brent Royal-Gordon
Architechies
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