feat: add swift implementation to lcof2 problem: No.064 (doocs#3133)

Author: klever34

lcof2/剑指 Offer II 064. 神奇的字典/README.md

@@ -257,6 +257,62 @@ func patterns(word string) []string {
  */
 ```
 
+#### Swift
+
+```swift
+class MagicDictionary {
+    private var words: Set<String>
+    private var counter: [String: Int]
+
+    init() {
+        words = Set<String>()
+        counter = [String: Int]()
+    }
+
+    func buildDict(_ dictionary: [String]) {
+        for word in dictionary {
+            words.insert(word)
+            for pattern in patterns(word) {
+                counter[pattern, default: 0] += 1
+            }
+        }
+    }
+
+    func search(_ searchWord: String) -> Bool {
+        for pattern in patterns(searchWord) {
+            let count = counter[pattern, default: 0]
+            if count > 1 || (count == 1 && !words.contains(searchWord)) {
+                return true
+            }
+        }
+        return false
+    }
+
+    private func patterns(_ word: String) -> [String] {
+        var result = [String]()
+        var chars = Array(word)
+        for i in 0..<chars.count {
+            let originalChar = chars[i]
+            chars[i] = "*"
+            result.append(String(chars))
+            chars[i] = originalChar
+        }
+        return result
+    }
+}
+
+/**
+ * Example usage:
+ * let obj = MagicDictionary()
+ * obj.buildDict(["hello", "hallo", "leetcode"])
+ * let param_2 = obj.search("hello")
+ * let param_3 = obj.search("hhllo")
+ * let param_4 = obj.search("hell")
+ * let param_5 = obj.search("leetcoded")
+ */
+
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

lcof2/剑指 Offer II 064. 神奇的字典/Solution.swift

@@ -0,0 +1,50 @@
+class MagicDictionary {
+    private var words: Set<String>
+    private var counter: [String: Int]
+
+    init() {
+        words = Set<String>()
+        counter = [String: Int]()
+    }
+
+    func buildDict(_ dictionary: [String]) {
+        for word in dictionary {
+            words.insert(word)
+            for pattern in patterns(word) {
+                counter[pattern, default: 0] += 1
+            }
+        }
+    }
+
+    func search(_ searchWord: String) -> Bool {
+        for pattern in patterns(searchWord) {
+            let count = counter[pattern, default: 0]
+            if count > 1 || (count == 1 && !words.contains(searchWord)) {
+                return true
+            }
+        }
+        return false
+    }
+
+    private func patterns(_ word: String) -> [String] {
+        var result = [String]()
+        var chars = Array(word)
+        for i in 0..<chars.count {
+            let originalChar = chars[i]
+            chars[i] = "*"
+            result.append(String(chars))
+            chars[i] = originalChar
+        }
+        return result
+    }
+}
+
+/**
+ * Example usage:
+ * let obj = MagicDictionary()
+ * obj.buildDict(["hello", "hallo", "leetcode"])
+ * let param_2 = obj.search("hello")
+ * let param_3 = obj.search("hhllo")
+ * let param_4 = obj.search("hell")
+ * let param_5 = obj.search("leetcoded")
+ */