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Python: Remove the duplicate elements of a given array of numbers

Python Basic - 1: Exercise-73 with Solution

Write a Python program to remove the duplicate elements of a given array of numbers such that each element appear only once and return the new length of the given array.

Sample Solution:

Python Code:

def remove_duplicates(nums):
    for i in range (len(nums)-1, 0, -1):
        if nums[i] == nums[i-1]:
            del nums[i-1]
    return len(nums)

print(remove_duplicates([0,0,1,1,2,2,3,3,4,4,4]))
print(remove_duplicates([1, 2, 2, 3, 4, 4]))

Sample Output:

5
4

Pictorial Presentation:

Python: Remove the duplicate elements of a given array of numbers
Python: Remove the duplicate elements of a given array of numbers

Flowchart:

Flowchart: Python - Remove the duplicate elements of a given array of numbers

Python Code Editor:

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Python: Tips of the Day

What is the difference between Python's list methods append and extend?

append: Appends object at the end.

x = [1, 2, 3]
x.append([4, 5])
print (x)

Output:

[1, 2, 3, [4, 5]]

extend: Extends list by appending elements from the iterable.

x = [1, 2, 3]
x.extend([4, 5])
print (x)

Output:

[1, 2, 3, 4, 5]

Ref: https://bit.ly/2AZ6ZFq