Merge pull request youngyangyang04#1251 from xiaofei-2020/greed18

添加（0435.无重叠区间.md）：增加typescript版本

Author: youngyangyang04

problems/0435.无重叠区间.md

@@ -264,7 +264,7 @@ func min(a,b int)int{
     }
     return a
 }
-``` 
+```
 
 ### Javascript:
 - 按右边界排序
@@ -307,6 +307,55 @@ var eraseOverlapIntervals = function(intervals) {
 }
 ```
 
+### TypeScript
+
+> 按右边界排序，从左往右遍历
+
+```typescript
+function eraseOverlapIntervals(intervals: number[][]): number {
+    const length = intervals.length;
+    if (length === 0) return 0;
+    intervals.sort((a, b) => a[1] - b[1]);
+    let right: number = intervals[0][1];
+    let count: number = 1;
+    for (let i = 1; i < length; i++) {
+        if (intervals[i][0] >= right) {
+            count++;
+            right = intervals[i][1];
+        }
+    }
+    return length - count;
+};
+```
+
+> 按左边界排序，从左往右遍历
+
+```typescript
+function eraseOverlapIntervals(intervals: number[][]): number {
+    if (intervals.length === 0) return 0;
+    intervals.sort((a, b) => a[0] - b[0]);
+    let right: number = intervals[0][1];
+    let tempInterval: number[];
+    let resCount: number = 0;
+    for (let i = 1, length = intervals.length; i < length; i++) {
+        tempInterval = intervals[i];
+        if (tempInterval[0] >= right) {
+            // 未重叠
+            right = tempInterval[1];
+        } else {
+            // 有重叠，移除当前interval和前一个interval中右边界更大的那个
+            right = Math.min(right, tempInterval[1]);
+            resCount++;
+        }
+    }
+    return resCount;
+};
+```
+
+
+
+
+
 
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