two-sum solution

Author: Jaehyeon Robert Han

two-sum/Zioq.js

@@ -0,0 +1,30 @@
+/**
+ * @param {number[]} nums
+ * @param {number} target
+ * @return {number[]}
+ */
+var twoSum = function(nums, target) {
+    // Initialize object to save remained value with index
+    let remain_with_index_obj = {}
+
+    for ( let i =0; i<nums.length++; i++ ) {
+        let remain = target - nums[i]; // Calculate reamined value to check 
+
+        // If remained value found in the object, return current index and object's key
+        if( remain_with_index_obj.hasOwnProperty(remain) ) {
+            return [i, remain_with_index_obj[remain]]
+        }
+
+        // Save the valu as key
+        remain_with_index_obj[nums[i]] = i;
+    }
+    return null
+};
+
+/* 
+    Time Complexity: O(n)
+    Space Complexity: O(n)
+*/
+
+console.log(twoSum([2,7,11,15], 9));
+console.log(twoSum([3,2,4], 6));