Find Repeating Letters | Dataford Interview Questions

How would you write a program to find all repeating letters in a word?

Implement find_repeating_letters(word), returning each distinct letter that occurs at least twice, in the order of its first appearance. Matching is case-sensitive, and the input may contain Unicode characters.

Constraints

0 <= len(word) <= 1000
The input is a Python string and may contain Unicode characters
Matching is case-sensitive
Return each repeated character once, ordered by first appearance

Function Signature

def find_repeating_letters(word):

Your question is Find Repeating Letters. 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

How would you write a program to find all repeating letters in a word?

Constraints

0 <= len(word) <= 1000
The input is a Python string and may contain Unicode characters
Matching is case-sensitive
Return each repeated character once, ordered by first appearance

Function Signature

def find_repeating_letters(word):

Your question is Find Repeating Letters. 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.