Concatenation of Array
Description
Given an integer array nums
of length n
, you want to create an array ans
of length 2n
where ans[i] == nums[i]
and ans[i + n] == nums[i]
for 0 <= i < n
(0-indexed).
Specifically, ans
is the concatenation of two nums
arrays.
Return the array ans
.
Example 1:
Input: nums = [1,2,1] Output: [1,2,1,1,2,1] Explanation: The array ans is formed as follows: - ans = [nums[0],nums[1],nums[2],nums[0],nums[1],nums[2]] - ans = [1,2,1,1,2,1]
Example 2:
Input: nums = [1,3,2,1] Output: [1,3,2,1,1,3,2,1] Explanation: The array ans is formed as follows: - ans = [nums[0],nums[1],nums[2],nums[3],nums[0],nums[1],nums[2],nums[3]] - ans = [1,3,2,1,1,3,2,1]
Constraints:
n == nums.length
1 <= n <= 1000
1 <= nums[i] <= 1000
Solution(javascript)
/**
* @param {number[]} nums
* @return {number[]}
*/
var getConcatenation = function(nums) {
let concatArray = [];
let numsLength = nums.length;
for (let i = 0; i < numsLength; i++) {
concatArray[i] = nums[i]
}
for (let j = 0; j < numsLength; j++) {
concatArray[j + numsLength] = nums[j]
}
return concatArray;
};