Merge pull request youngyangyang04#977 from xiaofei-2020/master

添加 0704.二分查找.md Typescript 版本

Author: youngyangyang04

problems/0704.二分查找.md

@@ -284,7 +284,6 @@ func search(nums []int, target int) int {
  * @param {number} target
  * @return {number}
  */
-/**
 var search = function(nums, target) {
     let left = 0, right = nums.length - 1;
     // 使用左闭右闭区间
@@ -326,6 +325,46 @@ var search = function(nums, target) {
 };
 ```
 
+**TypeScript**
+
+（版本一）左闭右闭区间
+
+```typescript
+function search(nums: number[], target: number): number {
+    let left: number = 0, right: number = nums.length - 1;
+    while (left <= right) {
+        let mid: number = left + Math.floor((right - left) / 2);
+        if (nums[mid] > target) {
+            right = mid - 1;
+        } else if (nums[mid] < target) {
+            left = mid + 1;
+        } else {
+            return mid;
+        }
+    }
+    return -1;
+};
+```
+
+（版本二）左闭右开区间
+
+```typescript
+function search(nums: number[], target: number): number {
+    let left: number = 0, right: number = nums.length;
+    while (left < right) {
+        let mid: number = left + Math.floor((right - left) / 2);
+        if (nums[mid] > target) {
+            right = mid;
+        } else if (nums[mid] < target) {
+            left = mid + 1;
+        } else {
+            return mid;
+        }
+    }
+    return -1;
+};
+```
+
 **Ruby:**
 
 ```ruby