Converting from Sorted method to Sort in Swift 2 (Xcode 7)

Question

This function retrieves the array of item representation from disk, converts it to an array of TodoItem instances using an unnamed closure we pass to map, and sorts that array chronologically. Sorted doesn't work anymore, I get an error to switch to sort. But I can't seem to get it right. Whatever I do results in various errors.

func allItems() -> [TodoItem] {
        var todoDictionary = NSUserDefaults.standardUserDefaults().dictionaryForKey(ITEMS_KEY) ?? [:]
        let items = Array(todoDictionary.values)
        return items.map({TodoItem(deadline: $0["deadline"] as! NSDate, title: $0["title"] as! String, UUID: $0["UUID"] as! String!)}).sorted({(left: TodoItem, right:TodoItem) -> Bool in
            (left.deadline.compare(right.deadline) == .OrderedAscending)
        })
    }

Eric Aya · Accepted Answer · 2015-10-28 20:38:16Z

1

Just replace sorted by sort, it looks like you've already done the rest of the translation (I can't check, not knowing how it was before):

func allItems() -> [TodoItem] {
    var todoDictionary = NSUserDefaults.standardUserDefaults().dictionaryForKey(ITEMS_KEY) ?? [:]
    let items = Array(todoDictionary.values)
    return items.map( {TodoItem(deadline: $0["deadline"] as! NSDate, title: $0["title"] as! String, UUID: $0["UUID"] as! String!)} ).sort( {(left: TodoItem, right:TodoItem) -> Bool in
        (left.deadline.compare(right.deadline) == .OrderedAscending)
    })
}

Reminder: sorted has become sort and the old sort is now sortInPlace.

answered Oct 28, 2015 at 20:38

Eric Aya

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1 Comment

Eric Aya Over a year ago

Be careful, this has changed again in Swift 3, where sort is the mutating method, and sorted is the one returning a new array.

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