✅ [2215] set

Author: enkr1

2215/my_solution.js

@@ -0,0 +1,29 @@
+/**
+ * @param {number[]} nums1
+ * @param {number[]} nums2
+ * @return {number[][]}
+ */
+var findDifference = function (nums1, nums2) {
+  let nums1Set = new Set(), nums2Set = new Set()
+
+  for (let i = 0; i < nums1.length; i++) {
+    nums1Set.add(nums1[i])
+  }
+
+  for (let i = 0; i < nums2.length; i++) {
+    nums2Set.add(nums2[i])
+  }
+
+  // {1,2,3} , {1,2}
+
+  let result = [[], []] // 0 nums1, 1 nums2
+  for (let key of nums1Set) {
+    if (!(nums2Set.has(key))) result[0].push(key)
+  }
+
+  for (let key of nums2Set) {
+    if (!(nums1Set.has(key))) result[1].push(key)
+  }
+
+  return result;
+};

2215/solution.js

@@ -0,0 +1,26 @@
+/**
+ * @param {number[]} nums1
+ * @param {number[]} nums2
+ * @return {number[][]}
+ */
+var findDifference = function (nums1, nums2) {
+  let nums1Set = new Set(), nums2Set = new Set(), result = [[], []]
+
+  for (let i = 0; i < nums1.length; i++) {
+    nums1Set.add(nums1[i])
+  }
+
+  for (let i = 0; i < nums2.length; i++) {
+    nums2Set.add(nums2[i])
+  }
+
+  for (let key of nums1Set) {
+    if (!(nums2Set.has(key))) result[0].push(key)
+  }
+
+  for (let key of nums2Set) {
+    if (!(nums1Set.has(key))) result[1].push(key)
+  }
+
+  return result;
+};

README.md

@@ -119,6 +119,7 @@
 - [1909. Remove One Element to Make the Array Strictly Increasing](./1909/)
 - [1971. Find if Path Exists in Graph](./1971/)
 - [2090. K Radius Subarray Averages](./2090/)
+- [2215. Find the Difference of Two Arrays](./2215/)
 - [2373. Largest Local Values in a Matrix](./2373/)
 - [2448. Minimum Cost to Make Array Equal](./2448/)
 
@@ -168,7 +169,7 @@ Batch create:
 NOTE: JS IS HERE
 -->
 ```ssh
-chapter=724 && mkdir ./$chapter && touch ./$chapter/my_solution.js && touch ./$chapter/solution.js && alias x="node ./$chapter/my_solution.js"
+chapter=2215 && mkdir ./$chapter && touch ./$chapter/my_solution.js && touch ./$chapter/solution.js && alias x="node ./$chapter/my_solution.js"
 ```
 > then you can use `x` for quick debug.