~Minor improvement.

Author: ochococo

Design-Patterns.playground.zip

@@ -26,7 +26,7 @@ class Circle : Shape {
 class Whiteboard : Shape {
     lazy var shapes = [Shape]()
 
-    init(_ shapes:[Shape]) {
+    init(_ shapes:Shape...) {
         self.shapes = shapes
     }
 

Design-Patterns.playground/section-24.swift

@@ -1,2 +1,2 @@
-var whiteboard = Whiteboard([Circle(), Square()])
+var whiteboard = Whiteboard(Circle(), Square())
 whiteboard.draw("Red")

Design-Patterns.playground/section-26.swift

@@ -244,7 +244,7 @@ class Circle : Shape {
 class Whiteboard : Shape {
     lazy var shapes = [Shape]()
 
-    init(_ shapes:[Shape]) {
+    init(_ shapes:Shape...) {
         self.shapes = shapes
     }
 
@@ -257,7 +257,7 @@ class Whiteboard : Shape {
 ```
 **Usage:**
 ```swift
-var whiteboard = Whiteboard([Circle(), Square()])
+var whiteboard = Whiteboard(Circle(), Square())
 whiteboard.draw("Red")
 ```