如何在Swift中对对象数组进行排序？

Question

I'm currently writing like this

static func fromIntervals(intervals: [Interval]) -> ChartData {
    let sortedIntervals = intervals.sorted { (a, b) in return a.startTime < b.startTime}
}

But it shows error of

Cannot invoke 'sorted' with an argument list of type '((_, _) -> _)'

I searched for a lot of other code examples, and none of them work, I have no idea why. Any suggestions?

Answer 1

它sort不sorted

let sortedIntervals = intervals.sort { (a, b) in return a.startTime < b.startTime}

Answer 2

You are doing it wrong. Use sort instead of sorted .

static func fromIntervals(intervals: [Interval]) -> ChartData {
    let sortedIntervals = intervals.sort { (a, b) in return a.startTime < b.startTime}
}

EDIT:

let sortedIntervals = sorted(intervals, { (a: Object, b: Object) -> Bool in return a.startTime < b.startTime } )

See Apple's Doc for more information.

Hope this helps.. :)