feat: update solutions to lc problem: No.2206 (#4262)

Author: rain84

solution/2200-2299/2206.Divide Array Into Equal Pairs/README.md

@@ -144,18 +144,6 @@ func divideArray(nums []int) bool {
 }
 ```
 
-#### TypeScript
-
-```ts
-function divideArray(nums: number[]): boolean {
-    const cnt: Record<number, number> = {};
-    for (const x of nums) {
-        cnt[x] = (cnt[x] || 0) + 1;
-    }
-    return Object.values(cnt).every(x => x % 2 === 0);
-}
-```
-
 #### Rust
 
 ```rust
@@ -172,6 +160,24 @@ impl Solution {
 }
 ```
 
+#### TypeScript
+
+```ts
+function divideArray(nums: number[]): boolean {
+    const cnt = Array(501).fill(0);
+
+    for (const x of nums) {
+        cnt[x]++;
+    }
+
+    for (const x of cnt) {
+        if (x & 1) return false;
+    }
+
+    return true;
+}
+```
+
 #### JavaScript
 
 ```js
@@ -180,11 +186,17 @@ impl Solution {
  * @return {boolean}
  */
 var divideArray = function (nums) {
-    const cnt = {};
+    const cnt = Array(501).fill(0);
+
     for (const x of nums) {
-        cnt[x] = (cnt[x] || 0) + 1;
+        cnt[x]++;
     }
-    return Object.values(cnt).every(x => x % 2 === 0);
+
+    for (const x of cnt) {
+        if (x & 1) return false;
+    }
+
+    return true;
 };
 ```
 

solution/2200-2299/2206.Divide Array Into Equal Pairs/README_EN.md

@@ -38,7 +38,7 @@ tags:
 <pre>
 <strong>Input:</strong> nums = [3,2,3,2,2,2]
 <strong>Output:</strong> true
-<strong>Explanation:</strong> 
+<strong>Explanation:</strong>
 There are 6 elements in nums, so they should be divided into 6 / 2 = 3 pairs.
 If nums is divided into the pairs (2, 2), (3, 3), and (2, 2), it will satisfy all the conditions.
 </pre>
@@ -48,7 +48,7 @@ If nums is divided into the pairs (2, 2), (3, 3), and (2, 2), it will satisfy al
 <pre>
 <strong>Input:</strong> nums = [1,2,3,4]
 <strong>Output:</strong> false
-<strong>Explanation:</strong> 
+<strong>Explanation:</strong>
 There is no way to divide nums into 4 / 2 = 2 pairs such that the pairs satisfy every condition.
 </pre>
 
@@ -142,18 +142,6 @@ func divideArray(nums []int) bool {
 }
 ```
 
-#### TypeScript
-
-```ts
-function divideArray(nums: number[]): boolean {
-    const cnt: Record<number, number> = {};
-    for (const x of nums) {
-        cnt[x] = (cnt[x] || 0) + 1;
-    }
-    return Object.values(cnt).every(x => x % 2 === 0);
-}
-```
-
 #### Rust
 
 ```rust
@@ -170,6 +158,24 @@ impl Solution {
 }
 ```
 
+#### TypeScript
+
+```ts
+function divideArray(nums: number[]): boolean {
+    const cnt = Array(501).fill(0);
+
+    for (const x of nums) {
+        cnt[x]++;
+    }
+
+    for (const x of cnt) {
+        if (x & 1) return false;
+    }
+
+    return true;
+}
+```
+
 #### JavaScript
 
 ```js
@@ -178,11 +184,17 @@ impl Solution {
  * @return {boolean}
  */
 var divideArray = function (nums) {
-    const cnt = {};
+    const cnt = Array(501).fill(0);
+
     for (const x of nums) {
-        cnt[x] = (cnt[x] || 0) + 1;
+        cnt[x]++;
     }
-    return Object.values(cnt).every(x => x % 2 === 0);
+
+    for (const x of cnt) {
+        if (x & 1) return false;
+    }
+
+    return true;
 };
 ```
 

solution/2200-2299/2206.Divide Array Into Equal Pairs/Solution.js

@@ -3,9 +3,15 @@
  * @return {boolean}
  */
 var divideArray = function (nums) {
-    const cnt = {};
+    const cnt = Array(501).fill(0);
+
     for (const x of nums) {
-        cnt[x] = (cnt[x] || 0) + 1;
+        cnt[x]++;
     }
-    return Object.values(cnt).every(x => x % 2 === 0);
+
+    for (const x of cnt) {
+        if (x & 1) return false;
+    }
+
+    return true;
 };

solution/2200-2299/2206.Divide Array Into Equal Pairs/Solution.ts

@@ -1,7 +1,13 @@
 function divideArray(nums: number[]): boolean {
-    const cnt: Record<number, number> = {};
+    const cnt = Array(501).fill(0);
+
     for (const x of nums) {
-        cnt[x] = (cnt[x] || 0) + 1;
+        cnt[x]++;
     }
-    return Object.values(cnt).every(x => x % 2 === 0);
+
+    for (const x of cnt) {
+        if (x & 1) return false;
+    }
+
+    return true;
 }