How to duplicate zeros in place using Python

0 min read 157 words

Given a fixed length array arr of integers, duplicate each occurrence of zero, shifting the remaining elements to the right.

Note that elements beyond the length of the original array are not written.

Do the above modifications to the input array in place, do not return anything from your function.

Examples

Example1:

Input: [1,0,2,3,0,4,5,0]
Output: null
Explanation: After calling your function, the input array is modified to: [1,0,0,2,3,0,0,4]

Example2:

Input: [1,2,3]
Output: null
Explanation: After calling your function, the input array is modified to: [1,2,3]

Writing the code

# declare our function
def duplicateZeros(arr):

    # create our incrementor
    i = 0

    # loop through all dynamic elements
    while i < len(arr)-1:
        # if the character is a zero
        if arr[i]==0:
            # remove the last item from the array
            arr.pop()
            # insert a zero in front of current element
            arr.insert(i+1, 0)
            # move one place forward
            i += 1

        # increment to the next character
        i += 1
Andrew
Andrew

Andrew is a visionary software engineer and DevOps expert with a proven track record of delivering cutting-edge solutions that drive innovation at Ataiva.com. As a leader on numerous high-profile projects, Andrew brings his exceptional technical expertise and collaborative leadership skills to the table, fostering a culture of agility and excellence within the team. With a passion for architecting scalable systems, automating workflows, and empowering teams, Andrew is a sought-after authority in the field of software development and DevOps.

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