arrayShuffle.js

/**
 * Given the array nums consisting of 2n elements in the form [x1,x2,...,xn,y1,y2,...,yn].

Return the array in the form [x1,y1,x2,y2,...,xn,yn].

 

Example 1:

Input: nums = [2,5,1,3,4,7], n = 3
Output: [2,3,5,4,1,7] 
Explanation: Since x1=2, x2=5, x3=1, y1=3, y2=4, y3=7 then the answer is [2,3,5,4,1,7].
Example 2:

Input: nums = [1,2,3,4,4,3,2,1], n = 4
Output: [1,4,2,3,3,2,4,1]
Example 3:

Input: nums = [1,1,2,2], n = 2
Output: [1,2,1,2]
 

Constraints:

1 <= n <= 500
nums.length == 2n
1 <= nums[i] <= 10^3

 */

/**
 *************************************************************
 SOLUTION
 *************************************************************
 */

// const n = 3;
// let nums = [2, 5, 1, 3, 4, 7];

const n = 4;
let nums = [1, 2, 3, 4, 4, 3, 2, 1];

let arr1 = [];
let arr2 = [];

for (i = 0; i <= n - 1; i++) {
  arr1.push(nums[i]);
}

for (i = n; i < nums.length; i++) {
  arr2.push(nums[i]);
}

console.log("Array 1 = ", arr1);
console.log("Array 2 = ", arr2);

let result = [];

for (i = 0; i < n; i++) {
  result.push(arr1[i]);
  result.push(arr2[i]);
}

console.log("Final Result = ", result);
console.log("Result Array Length = ", result.length);