feat: add js solution to lc problem: No.2053

Author: rain84

solution/2000-2099/2053.Kth Distinct String in an Array/README.md

@@ -170,6 +170,25 @@ function kthDistinct(arr: string[], k: number): string {
 }
 ```
 
+#### JavaScript
+
+```js
+function kthDistinct(arr k) {
+    const cnt = new Map();
+
+    for (const x of arr) {
+        cnt.set(x, (cnt.get(x) ?? 0) + 1);
+    }
+
+    for (const [x, c] of cnt) {
+        if (c === 1) k--;
+        if (!k) return x;
+    }
+
+    return '';
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

solution/2000-2099/2053.Kth Distinct String in an Array/README_EN.md

@@ -171,6 +171,25 @@ function kthDistinct(arr: string[], k: number): string {
 }
 ```
 
+#### JavaScript
+
+```js
+function kthDistinct(arr k) {
+    const cnt = new Map();
+
+    for (const x of arr) {
+        cnt.set(x, (cnt.get(x) ?? 0) + 1);
+    }
+
+    for (const [x, c] of cnt) {
+        if (c === 1) k--;
+        if (!k) return x;
+    }
+
+    return '';
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

solution/2000-2099/2053.Kth Distinct String in an Array/Solution.js

@@ -0,0 +1,14 @@
+function kthDistinct(arr k) {
+    const cnt = new Map();
+
+    for (const x of arr) {
+        cnt.set(x, (cnt.get(x) ?? 0) + 1);
+    }
+
+    for (const [x, c] of cnt) {
+        if (c === 1) k--;
+        if (!k) return x;
+    }
+
+    return '';
+}