two sums solution

Author: froggy1014

two-sum/froggy1014.js

@@ -0,0 +1,18 @@
+/**
+ * @param {number[]} nums
+ * @param {number} target
+ * @return {number[]}
+ */
+var twoSum = function (nums, target) {
+  let map = new Map();
+  for (let idx = 0; idx < nums.length; idx++) {
+    const rest = target - nums[idx];
+    if (map.has(rest)) {
+      return [map.get(rest), idx];
+    }
+    map.set(nums[idx], idx);
+  }
+  return [];
+};
+
+console.log(twoSum([2, 11, 15, 7], 9));