feat: add ts solution to lc problem: No.1051

Author: rain84

solution/1000-1099/1051.Height Checker/README.md

@@ -142,6 +142,21 @@ func heightChecker(heights []int) int {
 }
 ```
 
+#### TypeScript
+
+```ts
+function heightChecker(heights: number[]): number {
+    const sorted = [...heights].sort((a, b) => a - b);
+    let ans = 0;
+
+    for (let i = 0; i < heights.length; i++) {
+        if (sorted[i] !== heights[i]) ans++;
+    }
+
+    return ans;
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

solution/1000-1099/1051.Height Checker/README_EN.md

@@ -137,6 +137,21 @@ func heightChecker(heights []int) int {
 }
 ```
 
+#### TypeScript
+
+```ts
+function heightChecker(heights: number[]): number {
+    const sorted = [...heights].sort((a, b) => a - b);
+    let ans = 0;
+
+    for (let i = 0; i < heights.length; i++) {
+        if (sorted[i] !== heights[i]) ans++;
+    }
+
+    return ans;
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

solution/1000-1099/1051.Height Checker/Solution.ts

@@ -0,0 +1,10 @@
+function heightChecker(heights: number[]): number {
+    const sorted = [...heights].sort((a, b) => a - b);
+    let ans = 0;
+
+    for (let i = 0; i < heights.length; i++) {
+        if (sorted[i] !== heights[i]) ans++;
+    }
+
+    return ans;
+}