LeetCode： Shuffle the Array

Question

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]

Solution #1

def shuffle(nums, n)
  result = []
  i = 0

  arr1 = nums[0..n - 1] # [2, 5, 1]
  arr2 = nums[n..-1] # [3, 4, 7]

  while i < n
    result << arr1[i]
    result << arr2[i]
    i += 1
  end
  result
end

Solution #2

def shuffle(nums, n)
  arr1 = nums[0..n - 1] # [2, 5, 1]
  arr2 = nums[n..-1] # [3, 4, 7]

  arr1.zip(arr2).flatten
end