日付リテラルっぽいのを使ってみる。

dateformatter.swift

import Foundation                                                               
var dateFmt: NSDateFormatter = NSDateFormatter()
dateFmt.dateFormat = "yyyy/MM/dd HH:mm:ss"

let date1 = dateFmt.dateFromString("2014/03/18 00:00:00")!
let date2: NSDate = dateFmt.dateFromString("2014/03/19 00:00:00")!

var order = date1.compare(date2)
print(order)
print(order == NSComparisonResult.OrderedDescending)
print(order == NSComparisonResult.OrderedAscending)
print(order.rawValue)
order = date2.compare(date1)
print(order)
print(order.rawValue)

print(NSComparisonResult(rawValue:-1))
print(NSComparisonResult(rawValue:0))
print(NSComparisonResult(rawValue: 1))

var arr: Array<NSNumber> = [10, 2, 4, 17, 1]
var ar = NSMutableArray(array: arr)
print(ar)
ar.sortUsingComparator({
//ar.sortUsingComparator({(x, y) in
//ar.sortUsingComparator({(x:NSNumber, y:NSNumber) -> NSComparisonResult in
                       return $1.compare($0 as! NSNumber)
})
print(ar)

var ar2:Array<NSString> = ["aaa", "bbb", "abc",]
var strings:NSMutableArray = NSMutableArray(array: ar2)

print(strings)
strings.sortUsingComparator( {
    return $1.compare($0 as! String)
} )
print(strings)