Ilkka Seppälä

Damm algorithm

4

In error detection, the Damm algorithm is a check digit algorithm that detects all single-digit errors and all adjacent transposition errors. https://en.wikipedia.org/wiki/Damm_algorithm

Play sound from file

7

The method could play a sound file. No external libraries should be used.

Generate random numbers

8

- Generate a random number between x and y - Throw dice e.g. 3d6

Github's instructions: https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/setting-guidelines-for-repository-contributors

Elo rating

3

Provide snippet that calculates Elo rating https://en.wikipedia.org/wiki/Elo_rating_system

To show the code snippets correctly on the Chinese website, we need a translation of `README.md`. The result of the translation should be placed to `localization/zh/README.md`.

Luhn mod N algorithm

4

The Luhn mod N algorithm is an extension to the Luhn algorithm (also known as mod 10 algorithm) that allows it to work with sequences of values in any base....

Play video file

10

The method can play a video file

Verhoeff alhorithm

2

The Verhoeff algorithm is a checksum formula for error detection developed by the Dutch mathematician Jacobus Verhoeff. https://en.wikipedia.org/wiki/Verhoeff_algorithm

Unzip an archive

8

http://www.baeldung.com/java-compress-and-uncompress chapter 5