Fix two_sum.js and .ts

codes/javascript/chapter_searching/two_sum.js

@@ -24,10 +24,10 @@ function twoSumHashTable(nums, target) {
     let m = {};
     // 单层循环，时间复杂度 O(n)
     for (let i = 0; i < nums.length; i++) {
-        if (m[nums[i]] !== undefined) {
-            return [m[nums[i]], i];
+        if (m[target - nums[i]] !== undefined) {
+            return [m[target-nums[i]], i];
         } else {
-            m[target - nums[i]] = i;
+            m[nums[i]] = i;
         }
     }
     return [];

codes/typescript/chapter_searching/two_sum.ts

@@ -24,11 +24,11 @@ function twoSumHashTable(nums: number[], target: number): number[] {
     let m: Map<number, number> = new Map();
     // 单层循环，时间复杂度 O(n)
     for (let i = 0; i < nums.length; i++) {
-        let index = m.get(nums[i]);
+        let index = m.get(target - nums[i]);
         if (index !== undefined) {
             return [index, i];
         } else {
-            m.set(target - nums[i], i);
+            m.set(nums[i], i);
         }
     }
     return [];