Merge branch 'master' of github.com:swiftwind0405/leetcode

Author: swiftwind0405

algorithms/2Sum/2Sum.js

@@ -0,0 +1,12 @@
+var twoSum = function (nums, target) {
+  const map = new Map();
+  const len = nums.length;
+
+  for (var i = 0; i < len; i++) {
+    var diff = target - nums[i];
+    if (map.has(diff) && i !== map.get(diff)) {
+      return [i, map.get(diff)]
+    }
+    map.set(nums[i], i);
+  }
+}