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283. Move Zeroes
Easy
Given an integer array nums, move all 0’s to the end of it while maintaining the relative order of the non-zero elements.
Note that you must do this in-place without making a copy of the array.
Example 1:
Input: nums = [0,1,0,3,12]
Output: [1,3,12,0,0]
Example 2:
Input: nums = [0]
Output: [0]
Constraints:
1 <= nums.length <= 104-231 <= nums[i] <= 231 - 1
Follow up: Could you minimize the total number of operations done?
Solution
object Solution {
def moveZeroes(nums: Array[Int]): Unit = {
var firstZero = 0
for (i <- nums.indices) {
if (nums(i) != 0) {
swap(firstZero, i, nums)
firstZero += 1
}
}
}
private def swap(index1: Int, index2: Int, numbers: Array[Int]): Unit = {
val val2 = numbers(index2)
numbers(index2) = numbers(index1)
numbers(index1) = val2
}
}