diff --git a/solution/0400-0499/0442.Find All Duplicates in an Array/README.md b/solution/0400-0499/0442.Find All Duplicates in an Array/README.md
index ef097526e76fc..949d1e933d057 100644
--- a/solution/0400-0499/0442.Find All Duplicates in an Array/README.md	
+++ b/solution/0400-0499/0442.Find All Duplicates in an Array/README.md	
@@ -146,6 +146,27 @@ func findDuplicates(nums []int) []int {
 }
 ```
 
+#### TypeScript
+
+```ts
+function findDuplicates(nums: number[]): number[] {
+    for (let i = 0; i < nums.length; i++) {
+        while (nums[i] !== nums[nums[i] - 1]) {
+            const temp = nums[i];
+            nums[i] = nums[temp - 1];
+            nums[temp - 1] = temp;
+        }
+    }
+    const ans: number[] = [];
+    for (let i = 0; i < nums.length; i++) {
+        if (nums[i] !== i + 1) {
+            ans.push(nums[i]);
+        }
+    }
+    return ans;
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->
diff --git a/solution/0400-0499/0442.Find All Duplicates in an Array/README_EN.md b/solution/0400-0499/0442.Find All Duplicates in an Array/README_EN.md
index 013557eeb986e..8a3feeb89f721 100644
--- a/solution/0400-0499/0442.Find All Duplicates in an Array/README_EN.md	
+++ b/solution/0400-0499/0442.Find All Duplicates in an Array/README_EN.md	
@@ -133,6 +133,27 @@ func findDuplicates(nums []int) []int {
 }
 ```
 
+#### TypeScript
+
+```ts
+function findDuplicates(nums: number[]): number[] {
+    for (let i = 0; i < nums.length; i++) {
+        while (nums[i] !== nums[nums[i] - 1]) {
+            const temp = nums[i];
+            nums[i] = nums[temp - 1];
+            nums[temp - 1] = temp;
+        }
+    }
+    const ans: number[] = [];
+    for (let i = 0; i < nums.length; i++) {
+        if (nums[i] !== i + 1) {
+            ans.push(nums[i]);
+        }
+    }
+    return ans;
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->
diff --git a/solution/0400-0499/0442.Find All Duplicates in an Array/Solution.ts b/solution/0400-0499/0442.Find All Duplicates in an Array/Solution.ts
new file mode 100644
index 0000000000000..ed9cd7d2d95ab
--- /dev/null
+++ b/solution/0400-0499/0442.Find All Duplicates in an Array/Solution.ts	
@@ -0,0 +1,16 @@
+function findDuplicates(nums: number[]): number[] {
+    for (let i = 0; i < nums.length; i++) {
+        while (nums[i] !== nums[nums[i] - 1]) {
+            const temp = nums[i];
+            nums[i] = nums[temp - 1];
+            nums[temp - 1] = temp;
+        }
+    }
+    const ans: number[] = [];
+    for (let i = 0; i < nums.length; i++) {
+        if (nums[i] !== i + 1) {
+            ans.push(nums[i]);
+        }
+    }
+    return ans;
+}
diff --git a/solution/2200-2299/2283.Check if Number Has Equal Digit Count and Digit Value/Solution.go b/solution/2200-2299/2283.Check if Number Has Equal Digit Count and Digit Value/Solution.go
index abb22e8f7a4f2..168c7124bee8a 100644
--- a/solution/2200-2299/2283.Check if Number Has Equal Digit Count and Digit Value/Solution.go	
+++ b/solution/2200-2299/2283.Check if Number Has Equal Digit Count and Digit Value/Solution.go	
@@ -9,4 +9,4 @@ func digitCount(num string) bool {
 		}
 	}
 	return true
-}
\ No newline at end of file
+}