GUMUNYEONG : two-sum

Author: mykoo

two-sum/GUMUNYEONG.js

@@ -0,0 +1,39 @@
+/**
+ * @param {number[]} nums
+ * @param {number} target
+ * @return {number[]}
+ */
+var twoSum = function (nums, target) {
+    let result = [];
+    let numPair = {};
+
+    for (let i = 0; i < nums.length; i++) {
+        numPair[nums[i]] = target - nums[i];
+    }
+
+
+
+    for (const key in numPair) {
+        let list = [];
+        const reverseKey = numPair[key];
+
+        if (numPair[reverseKey] && parseInt(key) === numPair[reverseKey]) {
+            let firstNum;
+            let secNum;
+
+            if (parseInt(key) === reverseKey) {
+                firstNum = nums.indexOf(reverseKey);
+                secNum = nums.indexOf(reverseKey, firstNum + 1);
+            } else {
+                firstNum = nums.indexOf(parseInt(key));
+                secNum = nums.indexOf(reverseKey);
+            }
+
+            result.push(firstNum);
+            result.push(secNum);
+
+            return result;
+        }
+    }
+
+};