Merge pull request #1435 from xiaofei-2020/exArr09

添加（0035.搜索插入位置.md）：增加typescript版本

problems/0035.搜索插入位置.md

@@ -283,6 +283,28 @@ var searchInsert = function (nums, target) {
 };
 ```
 
+### TypeScript
+
+```typescript
+// 第一种二分法
+function searchInsert(nums: number[], target: number): number {
+    const length: number = nums.length;
+    let left: number = 0,
+        right: number = length - 1;
+    while (left <= right) {
+        const mid: number = Math.floor((left + right) / 2);
+        if (nums[mid] < target) {
+            left = mid + 1;
+        } else if (nums[mid] === target) {
+            return mid;
+        } else {
+            right = mid - 1;
+        }
+    }
+    return right + 1;
+};
+```
+
 ### Swift 
 
 ```swift