feat: add typescript solution to lc problem: No.0705.Design HashSet

Author: zhaocchen

solution/0700-0799/0705.Design HashSet/README.md

@@ -190,6 +190,37 @@ class MyHashSet {
  */
 ```
 
+### **TypeScript** 
+
+```ts
+class MyHashSet {
+    data: Array<boolean>;
+    constructor() {
+        this.data = new Array(10 ** 6 + 1).fill(false);
+    }
+
+    add(key: number): void {
+        this.data[key] = true;
+    }
+
+    remove(key: number): void {
+        this.data[key] = false;
+    }
+
+    contains(key: number): boolean {
+        return this.data[key];
+    }
+}
+
+/**
+ * Your MyHashSet object will be instantiated and called as such:
+ * var obj = new MyHashSet()
+ * obj.add(key)
+ * obj.remove(key)
+ * var param_3 = obj.contains(key)
+ */
+```
+
 ### **...**
 
 ```

solution/0700-0799/0705.Design HashSet/README_EN.md

@@ -117,6 +117,37 @@ class MyHashSet {
  */
 ```
 
+### **TypeScript**
+
+```ts
+class MyHashSet {
+    data: Array<boolean>;
+    constructor() {
+        this.data = new Array(10 ** 6 + 1).fill(false);
+    }
+
+    add(key: number): void {
+        this.data[key] = true;
+    }
+
+    remove(key: number): void {
+        this.data[key] = false;
+    }
+
+    contains(key: number): boolean {
+        return this.data[key];
+    }
+}
+
+/**
+ * Your MyHashSet object will be instantiated and called as such:
+ * var obj = new MyHashSet()
+ * obj.add(key)
+ * obj.remove(key)
+ * var param_3 = obj.contains(key)
+ */
+```
+
 ### **...**
 
 ```

solution/0700-0799/0705.Design HashSet/Solution.ts

@@ -0,0 +1,26 @@
+class MyHashSet {
+    data: Array<boolean>;
+    constructor() {
+        this.data = new Array(10 ** 6 + 1).fill(false);
+    }
+
+    add(key: number): void {
+        this.data[key] = true;
+    }
+
+    remove(key: number): void {
+        this.data[key] = false;
+    }
+
+    contains(key: number): boolean {
+        return this.data[key];
+    }
+}
+
+/**
+ * Your MyHashSet object will be instantiated and called as such:
+ * var obj = new MyHashSet()
+ * obj.add(key)
+ * obj.remove(key)
+ * var param_3 = obj.contains(key)
+ */