+Chain Of Responsibility

Author: Oktawian Chojnacki

README.markdown

@@ -128,7 +128,7 @@ enum NumberType {
 class NumberAbstractFactory {
     class func numberFactoryType(type : NumberType) -> NumberFactoryProtocol {
 
-        switch (type) {
+        switch type {
             case .NextStep:
                     return NextStepNumberFactory()
             case .Swift:
@@ -323,10 +323,11 @@ Eternal.objectForKey("Bishop")
 class PointConverter {
 
     class func convert(#point:Point, base:Double, negative:Bool) -> Point {
+
         var pointConverted = Point{
-            if let x = point.x{ $0.x = x * base * (negative ? -1.0 : 1.0) }
-            if let y = point.y{ $0.y = y * base * (negative ? -1.0 : 1.0) }
-            if let z = point.z{ $0.z = z * base * (negative ? -1.0 : 1.0) }
+            if let x = point.x { $0.x = x * base * (negative ? -1.0 : 1.0) }
+            if let y = point.y { $0.y = y * base * (negative ? -1.0 : 1.0) }
+            if let z = point.z { $0.z = z * base * (negative ? -1.0 : 1.0) }
         }
 
         return pointConverted
@@ -473,7 +474,7 @@ println("Cost : \(someCoffee.getCost()); Ingredients: \(someCoffee.getIngredient
 ```
 
 
-##🍬  Virtual Proxy
+##🍬 Virtual Proxy
 
 **Source:**
 ```swift
@@ -502,7 +503,7 @@ let humanInterface = HEVSuitHumanInterface()
 humanInterface.administerMorphine()
 ```
 
-##☔  Protection Proxy
+##☔ Protection Proxy
 
 **Source:**
 ```swift
@@ -524,6 +525,7 @@ class CurrentComputer : DoorOperator {
         if pass != "pass" {
             return false
         }
+
         computer = HAL9000()
 
         return true
@@ -558,7 +560,9 @@ computer.openDoors(doors)
 >
 >**Source:** [wikipedia.org](http://en.wikipedia.org/wiki/Behavioral_pattern)
 
-##🚧 Chain Of Responsibility
+##🐝 Chain Of Responsibility
+
+**Source:**
 ```swift
 class MoneyPile {
     let value: Int
@@ -572,21 +576,24 @@ class MoneyPile {
     }
 
     func canWithdraw(var v: Int) -> Bool {
+
         func canTakeSomeBill(want: Int) -> Bool {
             return (want / self.value) > 0
         }
 
         var q = self.quantity
+
         while canTakeSomeBill(v) {
+
             if (q == 0) {
                 break
             }
-            
+
             v -= self.value
-            q--
+            q -= 1
         }
 
-        if (v == 0) {
+        if v == 0 {
             return true
         } else if let next = self.nextPile {
             return next.canWithdraw(v)
@@ -606,7 +613,11 @@ class ATM {
         return self.hundred
     }
 
-    init(hundred: MoneyPile, fifty: MoneyPile, twenty: MoneyPile, ten: MoneyPile) {
+    init(hundred: MoneyPile, 
+           fifty: MoneyPile, 
+          twenty: MoneyPile, 
+             ten: MoneyPile) {
+
         self.hundred = hundred
         self.fifty = fifty
         self.twenty = twenty
@@ -621,18 +632,18 @@ class ATM {
 
 **Usage:**
 ```swift
-/// Create piles of money and link them together 10 < 20 < 50 < 100
-var ten = MoneyPile(value: 10, quantity: 6, nextPile: nil)
-var twenty = MoneyPile(value: 20, quantity: 2, nextPile: ten)
-var fifty = MoneyPile(value: 50, quantity: 2, nextPile: twenty)
-var hundred = MoneyPile(value: 100, quantity: 1, nextPile: fifty)
+// Create piles of money and link them together 10 < 20 < 50 < 100.
+let ten = MoneyPile(value: 10, quantity: 6, nextPile: nil)
+let twenty = MoneyPile(value: 20, quantity: 2, nextPile: ten)
+let fifty = MoneyPile(value: 50, quantity: 2, nextPile: twenty)
+let hundred = MoneyPile(value: 100, quantity: 1, nextPile: fifty)
 
-/// build atm
+// Build ATM.
 var atm = ATM(hundred: hundred, fifty: fifty, twenty: twenty, ten: ten)
-atm.canWithdraw(310) /// Cannot because ATM has only 300
-atm.canWithdraw(100) /// Can withdraw - 1x100
-atm.canWithdraw(165) /// Cannot withdraw because ATM doesn't has bill with value of 5
-atm.canWithdraw(30) /// Can withdraw - 1x20, 2x10
+atm.canWithdraw(310) // Cannot because ATM has only 300
+atm.canWithdraw(100) // Can withdraw - 1x100
+atm.canWithdraw(165) // Cannot withdraw because ATM doesn't has bill with value of 5
+atm.canWithdraw(30)  // Can withdraw - 1x20, 2x10
 ```
 
 ##👫 Command
@@ -704,10 +715,13 @@ fileManager.move()
 ```swift
 class StepCounter {
     var totalSteps: Int = 0 {
+        
         willSet(newTotalSteps) {
             println("About to set totalSteps to \(newTotalSteps)")
         }
+
         didSet {
+
             if totalSteps > oldValue  {
                 println("Added \(totalSteps - oldValue) steps")
             }