Add new exercises to Ruby

One of the easiest ways to add new exercises to the Ruby track is to translate them from other language tracks on Exercism. This page lists all of the exercises that exist on Exercism, but have not yet been implemented in Ruby.

The icon links to the generic, language-independent problem description

The icon links to the canonical test data

The language icons link to each existing implementation of the problem.

Once you've picked an exercise, follow the instructions in the Contributing Guide and submit your pull request to the Ruby track repository on GitHub.

Exercises

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Examples

Sublist

Write a function to determine if a list is a sublist of another list.

Bank Account

Simulate a bank account supporting opening/closing, withdraws, and deposits of money. Watch out for concurrent transactions!

Change

Correctly determine change to be given using the least number of coins

React

Implement a basic reactive system.

Forth

Implement an evaluator for a very simple subset of Forth

Parallel Letter Frequency

Count the frequency of letters in texts using parallel computation.

Rotational Cipher

Create an implementation of the rotational cipher, also sometimes called the Caesar cipher.

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.

Zipper

Creating a zipper for a binary tree.

Pov

Reparent a graph on a selected node

Rectangles

Count the rectangles in an ASCII diagram.

Word Search

Create a program to solve a word search puzzle.

Grep

Search a file for lines matching a regular expression pattern. Return the line number and contents of each matching line.

Zebra Puzzle

Solve the zebra puzzle.

Collatz Conjecture

Calculate the number of steps to reach 1 using the Collatz conjecture

Diffie Hellman

Diffie-Hellman key exchange.

Markdown

Refactor a Markdown parser

Sgf Parsing

Parsing a Smart Game Format string.

Dot Dsl

Write a Domain Specific Language similar to the Graphviz dot language

Error Handling

Implement various kinds of error handling and resource management

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.

Two Fer

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

Paasio

Report network IO statistics