feat: add ts solution to lc problem: No.2381 (doocs#2732)

* feat: update ts solutions to lc problem: No.2381

* Update solution/2300-2399/2381.Shifting Letters II/README.md

* Update solution/2300-2399/2381.Shifting Letters II/Solution.ts

* Update solution/2300-2399/2381.Shifting Letters II/README_EN.md

---------

Co-authored-by: thinkasany <[email protected]>

Author: cblh

solution/2300-2399/2381.Shifting Letters II/README.md

@@ -147,6 +147,33 @@ func shiftingLetters(s string, shifts [][]int) string {
 }
 ```
 
+```ts
+function shiftingLetters(s: string, shifts: number[][]): string {
+    const n: number = s.length;
+    const d: number[] = new Array(n + 1).fill(0);
+
+    for (let  [i, j, v] of shifts) {
+        if (v === 0) {
+            v--;
+        }
+        d[i] += v;
+        d[j + 1] -= v;
+    }
+
+    for (let i = 1; i <= n; ++i) {
+        d[i] += d[i - 1];
+    }
+
+    let ans: string = '';
+    for (let i = 0; i < n; ++i) {
+        const j = (s.charCodeAt(i) - 'a'.charCodeAt(0) + (d[i] % 26) + 26) % 26;
+        ans += String.fromCharCode('a'.charCodeAt(0) + j);
+    }
+
+    return ans;
+}
+```
+
 <!-- tabs:end -->
 
 <!-- end -->

solution/2300-2399/2381.Shifting Letters II/README_EN.md

@@ -139,6 +139,33 @@ func shiftingLetters(s string, shifts [][]int) string {
 }
 ```
 
+```ts
+function shiftingLetters(s: string, shifts: number[][]): string {
+    const n: number = s.length;
+    const d: number[] = new Array(n + 1).fill(0);
+
+    for (let  [i, j, v] of shifts) {
+        if (v === 0) {
+            v--;
+        }
+        d[i] += v;
+        d[j + 1] -= v;
+    }
+
+    for (let i = 1; i <= n; ++i) {
+        d[i] += d[i - 1];
+    }
+
+    let ans: string = '';
+    for (let i = 0; i < n; ++i) {
+        const j = (s.charCodeAt(i) - 'a'.charCodeAt(0) + (d[i] % 26) + 26) % 26;
+        ans += String.fromCharCode('a'.charCodeAt(0) + j);
+    }
+
+    return ans;
+}
+```
+
 <!-- tabs:end -->
 
 <!-- end -->

solution/2300-2399/2381.Shifting Letters II/Solution.ts

@@ -0,0 +1,24 @@
+function shiftingLetters(s: string, shifts: number[][]): string {
+    const n: number = s.length;
+    const d: number[] = new Array(n + 1).fill(0);
+
+    for (let  [i, j, v] of shifts) {
+        if (v === 0) {
+            v--;
+        }
+        d[i] += v;
+        d[j + 1] -= v;
+    }
+
+    for (let i = 1; i <= n; ++i) {
+        d[i] += d[i - 1];
+    }
+
+    let ans: string = '';
+    for (let i = 0; i < n; ++i) {
+        const j = (s.charCodeAt(i) - 'a'.charCodeAt(0) + (d[i] % 26) + 26) % 26;
+        ans += String.fromCharCode('a'.charCodeAt(0) + j);
+    }
+
+    return ans;
+}