Merge pull request youngyangyang04#304 from fusunx/master

1005.K次取反.md Javascript

problems/1005.K次取反后最大化的数组和.md

@@ -140,7 +140,29 @@ class Solution:
 Go：
 
 
+Javascript:
+```Javascript
+var largestSumAfterKNegations = function(nums, k) {
+    nums.sort((a, b) => {
+        return Math.abs(b) - Math.abs(a)
+    })
+    for(let i = 0; i < nums.length; i++) {
+        if(nums[i] < 0 && k > 0) {
+            nums[i] *= -1
+            k--
+        }
+    }
+
+    if(k > 0 && k % 2 === 1) {
+        nums[nums.length - 1] *= -1   
+    }
+    k = 0
 
+    return nums.reduce((a, b) => {
+        return a + b
+    })
+};
+```
 
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 * 作者微信：[程序员Carl](https://mp.weixin.qq.com/s/b66DFkOp8OOxdZC_xLZxfw)