Are there any functions in Swift 2 that will sort single-dimensional Arrays of NSDate in ascending or descending order without writing my own sorting algorithm?
I've tried the following, but > cannot be used to compare two NSDate objects unfortunately.
var array = [NSDate]()
array.sort { $0 < $1 }
You can take pacification's answer one step further by also declaring that NSDate conforms to Comparable:
public func ==(lhs: NSDate, rhs: NSDate) -> Bool {
return lhs.isEqualToDate(rhs)
}
public func <(lhs: NSDate, rhs: NSDate) -> Bool {
return lhs.compare(rhs) == .OrderedAscending
}
extension NSDate: Comparable { }
Then you can use sort() without providing a comparator:
let dates = [NSDate]()
dates.sort()
Ok, one way of doing this:
public func <(lhs: NSDate, rhs: NSDate) -> Bool {
return lhs.compare(rhs) == .OrderedAscending
}
And then just sort dates like you want:
var array = [NSDate]()
array.sort { $0 < $1 }
== operator for NSObject, there is no need to implement it for subclasses (like NSDate).