programming-challenges/challenges/first-non-repeating-character/README.md

# first-non-repeating-character

Created by [@theoludwig](https://github.com/theoludwig) 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](https://www.codewars.com/kata/52bc74d4ac05d0945d00054e/)

## Examples

See the `test` folder for examples of input/output.