Add new Swift exercises
One of the easiest ways to add new exercises to the Swift 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 Swift.
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 Swift track repository on GitHub.
Correctly determine change to be given using the least number of coins
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
Write a function to solve alphametics puzzles.
Implement complex numbers.
Compute the result for a game of Hex / Polygon
Given the size, return a square matrix of numbers in spiral order.
Rail Fence Cipher
Implement encoding and decoding for the rail fence cipher.
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.
Parallel Letter Frequency
Count the frequency of letters in texts using parallel computation.
For want of a horseshoe nail, a kingdom was lost, or so the saying goes. Output the full text of this proverbial rhyme.
Given two buckets of different size, demonstrate how to measure an exact number of liters.
Count the rectangles in an ASCII diagram.
Creating a zipper for a binary tree.
Determine if a number is an Armstrong number
Diffie-Hellman key exchange.
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.
Search a file for lines matching a regular expression pattern. Return the line number and contents of each matching line.
Implement various kinds of error handling and resource management
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).
Implement rational numbers.
Report network IO statistics