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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:

Follow up: Could you minimize the total number of operations done?

Solution

/*
 Do not return anything, modify nums in-place instead.
 */
function moveZeroes(nums: number[]): void {
    let firstZero = 0
    for (let i = 0; i < nums.length; i++) {
        if (nums[i] !== 0) {
            const temp = nums[i]
            nums[i] = nums[firstZero]
            nums[firstZero] = temp
            firstZero++
        }
    }
}

export { moveZeroes }