Using isEmpty instead of count for the array pop method

darren102 · darren102 · commit 3db2bc60535d · 2016-01-28T17:09:13.000-05:00
diff --git a/Stack/Stack.swift b/Stack/Stack.swift
@@ -19,11 +19,9 @@ public struct Stack<T> {
   }
 
   public mutating func pop() -> T? {
-    if count == 0 {
-      return nil
-    } else {
-      return array.removeLast()
-    }
+    guard !array.isEmpty else { return nil }
+
+    return array.removeLast()
   }
 
   public func peek() -> T? {

Original file line number	Diff line number	Diff line change
`@@ -19,11 +19,9 @@ public struct Stack<T> {`
`19`	`19`	`}`
`20`	`20`
`21`	`21`	`public mutating func pop() -> T? {`
`22`		`- if count == 0 {`
`23`		`- return nil`
`24`		`- } else {`
`25`		`- return array.removeLast()`
`26`		`- }`
	`22`	`+ guard !array.isEmpty else { return nil }`
	`23`	`+`
	`24`	`+ return array.removeLast()`
`27`	`25`	`}`
`28`	`26`
`29`	`27`	`public func peek() -> T? {`