programming-challenges/challenges/first-non-repeating-character

first-non-repeating-character

Created by @Divlo on 15 November 2020.

Instructions

Write a function that takes a string input, and returns the first character that is not repeated anywhere in the string.

For example, if given the input 'stress', the function should return 't', since the letter t only occurs once in the string, and occurs first in the string.

If a string contains all repeating characters, it should return an empty string ("").

Source

First non-repeating character - Codewars

Examples

See the test folder for examples of input/output.