Merge pull request #262 from chenf1214/master

添加 0056.合并区间 js版本

problems/0056.合并区间.md

@@ -212,6 +212,26 @@ func max(a, b int) int {
 }
 ```
 
+Javascript：
+```javascript
+var merge = function (intervals) {
+    intervals.sort((a, b) => a[0] - b[0]);
+    let prev = intervals[0]
+    let result = []
+    for(let i =0; i<intervals.length; i++){
+        let cur = intervals[i]
+        if(cur[0] > prev[1]){
+            result.push(prev)
+            prev = cur
+        }else{
+            prev[1] = Math.max(cur[1],prev[1])
+        }
+    }
+    result.push(prev)
+    return result
+};
+```
+
 
 
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