Add new Perl 5 exercises
One of the easiest ways to add new exercises to the Perl 5 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 Perl 5.
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 Perl 5 track repository on GitHub.
Determine if a sentence is a pangram.
Convert a long phrase to its acronym
Determine if a word or phrase is an isogram.
Calculate the number of steps to reach 1 using the Collatz conjecture
Make sure the brackets and braces all match.
Given a number n, determine what the nth prime is.
Determine if a number is perfect, abundant, or deficient based on Nicomachus' (60 - 120 CE) classification scheme for natural numbers.
Create a sentence of the form "One for X, one for me."
Run Length Encoding
Implement run-length encoding and decoding.
Given a letter, print a diamond starting with 'A' with the supplied letter at the widest point.
Take a nested list and return a single list with all values except nil/null
Create an implementation of the rotational cipher, also sometimes called the Caesar cipher.
Check if a given string is a valid ISBN-10 number.
Correctly determine change to be given using the least number of coins
Take input text and output it transposed.
Determine if a number is an Armstrong number
A data structure that uses a single, fixed-size buffer as if it were connected end-to-end.
Translate RNA sequences into proteins.
Simulate a bank account supporting opening/closing, withdraws, and deposits of money. Watch out for concurrent transactions!
Implement complex numbers.
Implement a basic reactive system.
Given the size, return a square matrix of numbers in spiral order.
Write a function to solve alphametics puzzles.
Compute the result for a game of Hex / Polygon
Make a chain of dominoes.
Implement an evaluator for a very simple subset of Forth
Pick the best hand(s) from a list of poker hands.
Rail Fence Cipher
Implement encoding and decoding for the rail fence cipher.
Count the rectangles in an ASCII diagram.
Tally the results of a small football competition.
Variable Length Quantity
Implement variable length quantity encoding and decoding.
Creating a zipper for a binary tree.
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.
Diffie-Hellman key exchange.
Parallel Letter Frequency
Count the frequency of letters in texts using parallel computation.
Given two buckets of different size, demonstrate how to measure an exact number of liters.
Refactor a Markdown parser
Search a file for lines matching a regular expression pattern. Return the line number and contents of each matching line.
Reparent a graph on a selected node
Generate musical scales, given a starting note and a set of intervals.
Create a program to solve a word search puzzle.
Implement various kinds of error handling and resource management
Implement rational numbers.
Count the scored points on a Go board.
Parsing a Smart Game Format string.
Write a Domain Specific Language similar to the Graphviz dot language
Refactor a tree building algorithm.
Score a single throw of dice in the game Yacht
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