feat: add ts solution to lc problem: No.2129 (#1360)

Author: thinkasany

solution/2100-2199/2129.Capitalize the Title/README.md

@@ -133,10 +133,34 @@ func capitalizeTitle(title string) string {
 
 ### **TypeScript**
 
-<!-- 这里可写当前语言的特殊实现逻辑 -->
-
 ```ts
+function capitalizeTitle(title: string): string {
+    const ans: string[] = [];
+    for (const s of title.split(' ')) {
+        if (s.length < 3) {
+            ans.push(s.toLowerCase());
+        } else {
+            ans.push(
+                s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase(),
+            );
+        }
+    }
+    return ans.join(' ');
+}
+```
 
+```ts
+function capitalizeTitle(title: string): string {
+    return title
+        .split(' ')
+        .map(s =>
+            s.length < 3
+                ? s.toLowerCase()
+                : s.substring(0, 1).toUpperCase() +
+                  s.substring(1).toLowerCase(),
+        )
+        .join(' ');
+}
 ```
 
 ### **...**

solution/2100-2199/2129.Capitalize the Title/README_EN.md

@@ -121,7 +121,33 @@ func capitalizeTitle(title string) string {
 ### **TypeScript**
 
 ```ts
+function capitalizeTitle(title: string): string {
+    const ans: string[] = [];
+    for (const s of title.split(' ')) {
+        if (s.length < 3) {
+            ans.push(s.toLowerCase());
+        } else {
+            ans.push(
+                s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase(),
+            );
+        }
+    }
+    return ans.join(' ');
+}
+```
 
+```ts
+function capitalizeTitle(title: string): string {
+    return title
+        .split(' ')
+        .map(s =>
+            s.length < 3
+                ? s.toLowerCase()
+                : s.substring(0, 1).toUpperCase() +
+                  s.substring(1).toLowerCase(),
+        )
+        .join(' ');
+}
 ```
 
 ### **...**

solution/2100-2199/2129.Capitalize the Title/Solution.ts

@@ -0,0 +1,13 @@
+function capitalizeTitle(title: string): string {
+    const ans: string[] = [];
+    for (const s of title.split(' ')) {
+        if (s.length < 3) {
+            ans.push(s.toLowerCase());
+        } else {
+            ans.push(
+                s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase(),
+            );
+        }
+    }
+    return ans.join(' ');
+}