two sum typescript

Author: nch3ng

README.md

@@ -1,6 +1,6 @@
 The solutions of Leetcode problems with Ruby until now
 
-[Add Two Numbers](https://leetcode.com/problems/add-two-numbers/)  
+[Add Two Numbers](https://leetcode.com/problems/add-two-numbers/)  (Hash, Array)
 [Contains Duplicate](https://leetcode.com/problems/contains-duplicate/)  
 [Contains Duplicate II](https://leetcode.com/problems/contains-duplicate-ii/)  
 Contains Duplicate III  

Two Sum/Solution.js

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+//let nums: number [] = [3,2,4];
+//let target: number = 7;
+var nums = [2, 7, 11, 15];
+var target = 18;
+/**
+ * @param {number[]} nums
+ * @param {number} target
+ * @return {number[]}
+ */
+var two_sum = function (nums, target) {
+    var ans = [];
+    var hash = {};
+    for (var i = 0; i < nums.length; i++) {
+        if (typeof hash[nums[i]] !== "undefined") {
+            ans[0] = hash[nums[i]];
+            ans[1] = i;
+        }
+        else {
+            hash[target - nums[i]] = i;
+        }
+    }
+    return ans;
+};
+console.log(two_sum(nums, target));

Two Sum/Solution.ts

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+//let nums: number [] = [3,2,4];
+//let target: number = 7;
+
+let nums: number [] = [2, 7, 11, 15];
+let target: number = 18;
+
+/**
+ * @param {number[]} nums
+ * @param {number} target
+ * @return {number[]}
+ */
+
+let two_sum = function (nums: number [], target: number): number [] {
+  let ans: number [] = [];
+  let hash: { [id: number]: number; }={};
+  for (let i = 0; i < nums.length; i++) {
+    if(typeof hash[nums[i]] !== "undefined") {
+      ans[0]=hash[nums[i]];
+      ans[1]=i
+    } else {
+      hash[target - nums[i]]=i;
+    }
+  }
+  return ans;
+}
+
+console.log(two_sum (nums, target));