sorted function in Swift 2

Question

I\'m sorting an Array like this:

var users = [\"John\", \"Matt\", \"Mary\", \"Dani\", \"Steve\"]

func back (s1:String, s2:String) -> Bool
{
    return s1         


        

Answer 1

In swift 2.2 there are multiple ways we can use closures with sort function as follows.

Consider the array

var names:[String] = ["aaa", "ffffd", "rrr", "bbb"];

The different options for sorting the array with swift closures are as added

Option 1

// In line with default closure format.
names = names.sort( { (s1: String, s2: String) -> Bool in return s1 < s2 })
print(names)

Option 2

// Omitted args types
names = names.sort( { s1, s2 in return s1 > s2 } )
print(names)

Option 3

// Omitted args types and return keyword as well
names = names.sort( { s1, s2 in s1 < s2 } )
print(names)

Option 4

// Shorthand Argument Names(with $ symbol)
// Omitted the arguments area completely.
names = names.sort( { $0 < $1 } )
print(names)

Option 5

This is the most simple way to use closure in sort function.

// With Operator Functions
names = names.sort(>)
print(names)