Add new Elixir exercises

One of the easiest ways to add new exercises to the Elixir track is to translate them from other language tracks on Exercism. This page lists all of the problem specifications in the common pool of exercises which have not yet been implemented in Elixir.

The icon links to the language-independent description of the problem.

The icon links to the canonical test data.

We also link to all the implementations of each exercise in other languages, which you can use for inspiration.

Once you've picked an exercise, follow the instructions in this guide and submit your pull request to the Elixir track repository on GitHub.




Two Fer

Create a sentence of the form "One for X, one for me."

Circular Buffer

A data structure that uses a single, fixed-size buffer as if it were connected end-to-end.

Linked List

Implement a doubly linked list

Food Chain

Generate the lyrics of the song 'I Know an Old Lady Who Swallowed a Fly'


Implement a basic reactive system.

Complex Numbers

Implement complex numbers.


Output the nursery rhyme 'This is the House that Jack Built'.

Reverse String

Reverse a string

Armstrong Numbers

Determine if a number is an Armstrong number

Variable Length Quantity

Implement variable length quantity encoding and decoding.

Book Store

To try and encourage more sales of different books from a popular 5 book series, a bookshop has decided to offer discounts of multiple-book purchases.


For want of a horseshoe nail, a kingdom was lost, or so the saying goes. Output the full text of this proverbial rhyme.


Count the rectangles in an ASCII diagram.

Two Bucket

Given two buckets of different size, demonstrate how to measure an exact number of liters.


Reparent a graph on a selected node

Word Search

Create a program to solve a word search puzzle.

Error Handling

Implement various kinds of error handling and resource management

Zebra Puzzle

Solve the zebra puzzle.

Go Counting

Count the scored points on a Go board.

Rational Numbers

Implement rational numbers.

Sgf Parsing

Parsing a Smart Game Format string.

Tree Building

Refactor a tree building algorithm.


Implement the logic of the hangman game using functional reactive programming.


Refactor a ledger printer.

Lens Person

Use lenses to update nested records (specific to languages with immutable data).


Report network IO statistics


Score a single throw of dice in the game Yacht