How to sort an array of object in Swift?

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?

Is startTime an NSDate? Then this is a duplicate of stackoverflow.com/questions/26577496/…: NSDates cannot be compared with < directly. — Martin R
– Martin R, Commented Jun 23, 2015 at 5:32

Christian Dietrich · Accepted Answer · 2015-06-23 05:09:20Z

1

it is sortnot sorted

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

edited Jun 23, 2015 at 5:09

answered Jun 23, 2015 at 5:06

Christian Dietrich

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Comments

halfer · Accepted Answer · 2022-03-19 23:55:17Z

1

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.

edited Mar 19, 2022 at 23:55

halfer

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answered Jun 23, 2015 at 5:08

Rashad

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1 Comment

firstprayer Over a year ago

sort is changing the intervals itself - but that's immutable since it's the parameter of the function. I want another sorted copy.

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