Python3实现从排序数组中删除重复项算法分析

# -*- coding:utf-8 -*-
#! python3
def removeDuclicates(nums):
  nums[:] = sorted(set(nums))
  return len(nums)
#测试
arr1 = [1,1,2,3,4,5,5,6]
print(removeDuclicates(arr1))

# -*- coding:utf-8 -*-
#! python3
def removeDuplicates(nums):
  if not nums:
    return 0
  j = 0
  for i in range(1, len(nums)):
    if nums[j] != nums[i]:
      j += 1
      nums[j] = nums[i]
  return j + 1
#测试
arr1 = [1,1,2,3,4,5,5,6]
print(removeDuplicates(arr1))

# -*- coding:utf-8 -*-
#! python3
def removeDuplicates(nums):
  i = 0
  while i < len(nums) - 1:
    if nums[i] == nums[i + 1]:
      nums.remove(nums[i])
    else:
      i += 1
  return len(nums)
#测试
arr1 = [1,1,2,3,4,5,5,6]
print(removeDuplicates(arr1))