Finish Closures

Closures.playground/Contents.swift

@@ -0,0 +1,55 @@
+import Foundation
+
+func add(_ lhs: Int, _ rhs: Int) -> Int {
+    lhs + rhs
+}
+
+let addClosure: (Int, Int) -> Int
+= { (lhs: Int, rhs: Int) -> Int in
+    lhs + rhs
+}
+
+addClosure(20, 30)
+
+func customAdd(_ lhs: Int, _ rhs: Int, using function: (Int, Int) -> Int) -> Int{
+    return function(lhs, rhs)
+}
+
+customAdd(20, 30, using: addClosure)
+
+customAdd(20, 30, using: { (lhs: Int, rhs: Int) -> Int in lhs + rhs})
+
+customAdd(20, 30) { (rhs, lhs) in
+    rhs + lhs
+}
+
+customAdd(20, 30) { $0 + $1 }
+
+
+let ages = [2, 3, 54, 24, 512, 63, 32]
+ages.sorted(by: {(lhs: Int, rhs:Int) -> Bool in lhs < rhs})
+
+ages.sorted(by: <)
+ages.sorted(by: >)
+
+func customAdd2(using function: (Int, Int) -> Int, _ lhs: Int, _ rhs: Int) -> Int{
+    return function(lhs, rhs)
+}
+
+customAdd2(using: { (lhs, rhs) in lhs + rhs}, 20, 30)
+
+customAdd(30, 10, using: +)
+
+func doAddition(on value: Int, using function: (Int) -> Int) -> Int {
+    function(value)
+}
+
+doAddition(on: 30) { (value) in
+    value + 60
+}
+
+func add20To(value: Int) -> Int {
+    value + 20
+}
+
+doAddition(on: 10, using: add20To(value:))

Closures.playground/contents.xcplayground

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='7.0' target-platform='macos' swift-version='6' buildActiveScheme='true' executeOnSourceChanges='true' importAppTypes='true'/>

swift-playground.xcworkspace/contents.xcworkspacedata

@@ -1,6 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Workspace
    version = "1.0">
+   <FileRef
+      location = "group:Closures.playground">
+   </FileRef>
    <FileRef
       location = "group:Functions.playground">
    </FileRef>