Return Duplicates by Second Occurrence | Dataford Interview Questions

Write a function to reverse a string or find duplicate elements in an array using your preferred programming language.

For this exercise, implement the duplicate-elements option. Given an array of integers, return each value that appears more than once, exactly once, in the order its second occurrence is encountered.

Input: A list of integers. Output: A list containing the duplicate values. Return an empty list when no value is duplicated.

Constraints

0 <= len(nums) <= 1000
-10^9 <= nums[i] <= 10^9
Return duplicate values in the order their second occurrence is encountered
Each duplicate value must appear exactly once in the output

Function Signature

def find_duplicates(nums):

Whenever you're ready, walk me through your approach or go straight to the code. The requirements are in the Question tab.

Problem

Write a function to reverse a string or find duplicate elements in an array using your preferred programming language.

For this exercise, implement the duplicate-elements option. Given an array of integers, return each value that appears more than once, exactly once, in the order its second occurrence is encountered.

Input: A list of integers. Output: A list containing the duplicate values. Return an empty list when no value is duplicated.

Constraints

0 <= len(nums) <= 1000
-10^9 <= nums[i] <= 10^9
Return duplicate values in the order their second occurrence is encountered
Each duplicate value must appear exactly once in the output

Function Signature

def find_duplicates(nums):

Whenever you're ready, walk me through your approach or go straight to the code. The requirements are in the Question tab.