feat: add typescript solution to lc problem: No.0415.Add Strings (doo…

…cs#580)
chenxinxue521 · Oct 14, 2021 · 06875ce · 06875ce
1 parent 927ea66
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diff --git a/solution/0400-0499/0415.Add Strings/README.md b/solution/0400-0499/0415.Add Strings/README.md
@@ -64,6 +64,27 @@ class Solution {
 }
 ```
 
+### **TypeScript**
+
+```ts
+/**
+ * @param {string} num1
+ * @param {string} num2
+ * @return {string}
+ */
+var addStrings = function(num1, num2) {
+    let ans = [];
+    for (let i = num1.length - 1, j = num2.length - 1, sum = 0; i >= 0 || j >= 0 || sum > 0; i--, j--) {
+        const a = i >= 0 ? parseInt(num1.charAt(i), 10) : 0;
+        const b = j >= 0 ? parseInt(num2.charAt(j), 10) : 0;
+        sum += (a + b);
+        ans.unshift(sum % 10);
+        sum = Math.floor(sum / 10);
+    }
+    return ans.join("");
+};
+```
+
 ### **...**
 
 ```

diff --git a/solution/0400-0499/0415.Add Strings/README_EN.md b/solution/0400-0499/0415.Add Strings/README_EN.md
@@ -79,6 +79,27 @@ class Solution {
 }
 ```
 
+### **TypeScript**
+
+```ts
+/**
+ * @param {string} num1
+ * @param {string} num2
+ * @return {string}
+ */
+var addStrings = function(num1, num2) {
+    let ans = [];
+    for (let i = num1.length - 1, j = num2.length - 1, sum = 0; i >= 0 || j >= 0 || sum > 0; i--, j--) {
+        const a = i >= 0 ? parseInt(num1.charAt(i), 10) : 0;
+        const b = j >= 0 ? parseInt(num2.charAt(j), 10) : 0;
+        sum += (a + b);
+        ans.unshift(sum % 10);
+        sum = Math.floor(sum / 10);
+    }
+    return ans.join("");
+};
+```
+
 ### **...**
 
 ```

diff --git a/solution/0400-0499/0415.Add Strings/Solution.ts b/solution/0400-0499/0415.Add Strings/Solution.ts
@@ -0,0 +1,16 @@
+/**
+ * @param {string} num1
+ * @param {string} num2
+ * @return {string}
+ */
+ var addStrings = function(num1, num2) {
+    let ans = [];
+    for (let i = num1.length - 1, j = num2.length - 1, sum = 0; i >= 0 || j >= 0 || sum > 0; i--, j--) {
+        const a = i >= 0 ? parseInt(num1.charAt(i), 10) : 0;
+        const b = j >= 0 ? parseInt(num2.charAt(j), 10) : 0;
+        sum += (a + b);
+        ans.unshift(sum % 10);
+        sum = Math.floor(sum / 10);
+    }
+    return ans.join("");
+};