Stream Non-Repeating Character | Dataford Interview Questions

Write a program in your language of choice to find the first non-repeating character in a stream of data.

Implement first_non_repeating(stream), where stream is a case-sensitive string. Return a list containing the required character after each input character has been processed, or null when no character qualifies. Preserve the order and exact casing of the input characters.

Constraints

0 <= len(stream) <= 10^5
The stream contains printable ASCII characters
Output contains exactly one element per input character
Character comparisons are case-sensitive

Function Signature

def first_non_repeating(stream):

Your question is Stream Non-Repeating Character. 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

Write a program in your language of choice to find the first non-repeating character in a stream of data.

Constraints

0 <= len(stream) <= 10^5
The stream contains printable ASCII characters
Output contains exactly one element per input character
Character comparisons are case-sensitive

Function Signature

def first_non_repeating(stream):

Your question is Stream Non-Repeating Character. 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.