Deduplication Without Built-ins | Dataford Interview Questions

Remove duplicates from a list without using predefined/built-in functions.

Asked in the Round 1 stage. Coding; followed by code explanation.

Implement remove_duplicates(items). The input is a Python list of integers, and the output must be a new list containing each value once, in its original order. Do not use set, dict, membership helpers, sorting, len, append, or other predefined functions or collection methods.

Constraints

0 <= len(items) <= 10^4
Each item is an integer
The output preserves first-occurrence order
Do not use set, dict, membership helpers, sorting, len, append, or other predefined collection functions

Function Signature

def remove_duplicates(items):

Your question is Deduplication Without Built-ins. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Remove duplicates from a list without using predefined/built-in functions.

Asked in the Round 1 stage. Coding; followed by code explanation.

Constraints

0 <= len(items) <= 10^4
Each item is an integer
The output preserves first-occurrence order
Do not use set, dict, membership helpers, sorting, len, append, or other predefined collection functions

Function Signature

def remove_duplicates(items):

Your question is Deduplication Without Built-ins. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.