283 - Move Zeroes
Written on October 28, 2015
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Given an array nums, write a function to move all 0’s to the end of it while maintaining the relative order of the non-zero elements. For example, given nums = [0, 1, 0, 3, 12], after calling your function, nums should be [1, 3, 12, 0, 0]. Note: You must do this in-place without making a copy of the array. Minimize the total number of operations.
class Solution(object):
def moveZeroes(self, nums):
"""
:type nums: List[int]
:rtype: void Do not return anything, modify nums in-place instead.
"""
if not nums:
return
zero_index = 0
for i, num in enumerate(nums):
if num != 0:
nums[zero_index], nums[i] = nums[i], nums[zero_index]
zero_index += 1