code-challenges

💾 Challenges for coding interviews.

Click on the problem titles to see the solution.

Unique characters

Implement an algorithm to determine if all characters in a string are unique.

String permutation

Given two strings, write a method to decide if one is a permutation of the other.

Count unique labels

Find out how many labels are unique to a demographic.

INCOMPLETE: Connect Four

Create a function to determine who is the winner of a Connect Four game.

INCOMPLETE: Prime Factors

Create a function to find the prime factors of a number.