submit solution of 71. Simplify Path

Author: Binlogo

LeetCodePlayground.playground/Pages/71_SimplifyPath.xcplaygroundpage/Contents.swift

@@ -0,0 +1,34 @@
+//: [Previous](@previous)
+
+import Foundation
+
+class Solution {
+    func simplifyPath(_ path: String) -> String {
+        let paths = path.split(separator: "/")
+        
+        var pathStack = [String]()
+        
+        for path in paths {
+            guard path != ".", !path.isEmpty else { continue }
+            
+            if path == ".." {
+                pathStack.popLast()
+            } else {
+                pathStack.append(String(path))
+            }
+        }
+        
+        return "/" + pathStack.joined(separator: "/")
+    }
+}
+
+// Tests
+let s = Solution()
+s.simplifyPath("/home/") == "/home"
+s.simplifyPath("/../") == "/"
+s.simplifyPath("/home//foo/") == "/home/foo"
+s.simplifyPath("/a/./b/../../c/") == "/c"
+s.simplifyPath("/a/../../b/../c//.//") == "/c"
+s.simplifyPath("/a//b////c/d//././/..") == "/a/b/c"
+
+//: [Next](@next)

LeetCodePlayground.playground/contents.xcplayground

@@ -22,5 +22,6 @@
         <page name='75_SortColors'/>
         <page name='215_FindKthLargestInAnArray'/>
         <page name='88_MergeSortedArray'/>
+        <page name='71_SimplifyPath'/>
     </pages>
 </playground>