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.

Exercises

About

Examples

Linked List

Implement a doubly linked list

Circular Buffer

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

Food Chain

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

Two Fer

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

React

Implement a basic reactive system.

House

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

Alphametics

Write a function to solve alphametics puzzles.

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.

Complex Numbers

Implement complex numbers.

Proverb

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

Spiral Matrix

Given the size, return a square matrix of numbers in spiral order.

Word Search

Create a program to solve a word search puzzle.

Pov

Reparent a graph on a selected node

Rectangles

Count the rectangles in an ASCII diagram.

Two Bucket

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

Zebra Puzzle

Solve the zebra puzzle.

Error Handling

Implement various kinds of error handling and resource management

Sgf Parsing

Parsing a Smart Game Format string.

Go Counting

Count the scored points on a Go board.

Hangman

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

Ledger

Refactor a ledger printer.

Lens Person

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

Tree Building

Refactor a tree building algorithm.

Paasio

Report network IO statistics

Isbn Verifier

Check if a given string is a valid ISBN-10 number.