Closure Function

// CLOSURE
//1. SIMPLE CLOSURE
let disp = {print(" Simple closure displaying")}
disp()

// 2. RETURN FROM CLOSURE
let returnName = {
(name : String) -> String in
return name
}

print(returnName("Ram"))

// 3. CLOSURE : MULTIPLE ARGUMENT SINGLE RETURN
let getCalc = {
(x : Int, y : Int) -> Int in
return x+y
}
print(getCalc(15, 35))

// 4. CLOSURE : MULTIPLE ARGUMENT MULTIPLE RETURN
let getValue = {
(i : Int, j : Int) -> (Int,Int) in
return (i,j)
}

print(getValue(55,45))

// 5. CLOSURE : COMPARISON
func ascend(s1: String, s2: String) -> Bool {
   return s1 > s2
}
let stringcmp = ascend(s1 : "swift", s2 : "great")
print (stringcmp)

// 6. CLOSURE : SHORTHAND ARGUMENT
var shorthand: (String, String) -> String
shorthand = { $1 }
print(shorthand("100", "200"))

// 7. CLOSURE : SORTING ARRAY
let numb = [98, -20, -30, 42, 18, 35]
var sortedNumbers = numb.sorted{ (left: Int, right: Int) -> Bool in
   return left < right
}
let asc = numb.sorted()
print(asc)

// 8. 

func calcDecrement(forDecrement total: Int) -> () -> Int {
   var overallDecrement = 100
   func decrementer() -> Int {
      overallDecrement -= total
      print(overallDecrement)
      return overallDecrement
   }
   return decrementer
}
let decrem = calcDecrement(forDecrement: 18)
decrem()
decrem()
decrem()