Add new Ruby exercises
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 problem specifications in the common pool of exercises which have not yet been implemented in Ruby.
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 Ruby track repository on GitHub.
Write a function to determine if a list is a sublist of another list.
Implement a basic reactive system.
Simulate a bank account supporting opening/closing, withdraws, and deposits of money. Watch out for concurrent transactions!
Implement an evaluator for a very simple subset of Forth
Given the size, return a square matrix of numbers in spiral order.
Parallel Letter Frequency
Count the frequency of letters in texts using parallel computation.
Creating a zipper for a binary tree.
Determine if a number is an Armstrong number
Diffie-Hellman key exchange.
Count the rectangles in an ASCII diagram.
Variable Length Quantity
Implement variable length quantity encoding and decoding.
Refactor a Markdown parser
Reparent a graph on a selected node
Create a program to solve a word search puzzle.
Implement various kinds of error handling and resource management
Search a file for lines matching a regular expression pattern. Return the line number and contents of each matching line.
Write a Domain Specific Language similar to the Graphviz dot language
Count the scored points on a Go board.
Parsing a Smart Game Format string.
Refactor a tree building algorithm.
Implement the logic of the hangman game using functional reactive programming.
Refactor a ledger printer.
Use lenses to update nested records (specific to languages with immutable data).
Report network IO statistics