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Overview
Syllabus
- Hello World
- Exercism's classic introductory exercise. Just say "Hello, World!".
- Lasagna
- Learn about the basics of Gleam by following a lasagna recipe.
- Pacman Rules
- Learn about bools by implementing the rules of the Pac-Man game.
- Betty's Bike Shop
- Learn about modules by helping Betty to display her bikes prices.
- Guessing Game
- Learn about case expressions by implementing a simple game in which the player needs to guess a secret number
- Tisbury Treasure Hunt
- Learn usage of Tuples by designing a pirate treasure game
- Tracks on Tracks on Tracks
- Learn abouts lists by keeping track of the programming languages you want to learn.
- Log Levels
- Learn about strings by parsing application logs
- Valentine's Day
- Learn usage of Custom Types while deciding what to do for Valentines Day
- Bandwagoner
- Learn about labelled fields by keeping a history of basketball statistics
- Bird Count
- Learn about recursion by keeping track of how many birds visit your garden each day.
- Pizza Pricing
- Learn about tail call optimisation by implementing a pizza-pricing algorithm
- Secrets
- Learn about anonymous functions by writing the software for an encryption device.
- High School Sweetheart
- Learn about the pipe operator by helping high school sweethearts profess their love on social media via ASCII art.
- Treasure Chest
- Learn about generics in Gleam by creating a treasure chest
- Go
- Learn usage of Result by applying the rules of the game of Go
- High Score Board
- Practice Gleam dicts by tracking high scores of an arcade game.
- Weather Ranking
- Learn about the Order type by ranking weather conditions
- Wine Cellar
- Learn about labelled arguments by providing wine suggestions to the customers in your restaurant.
- Gotta Snatch 'Em All
- Learn to use sets by playing a trading card game
- Role Playing Game
- Learn the Option type by designing game mechanics
- Spring Cleaning
- Learn about let assertions by cleaning some poorly organised data.
- DNA Encoding
- Learn about bit arrays by encoding DNA sequences as binary data.
- Newsletter
- Learn about IO by sending out a newsletter.
- Secure Treasure Chest
- Learn about opaque types by making a more secure treasure chest
- Sticker Shop
- Learn about Phantom Types by selling cute programming stickers
- Erlang Extraction
- Learn about external types and functions by using an Erlang library
- Expert Experiments
- Learn about use expressions by conducting some experiments
- Difference Of Squares
- Find the difference between the square of the sum and the sum of the squares of the first N natural numbers.
- Resistor Color
- Convert a resistor band's color to its numeric representation.
- Reverse String
- Reverse a given string.
- RNA Transcription
- Given a DNA strand, return its RNA complement.
- Two Fer
- Create a sentence of the form "One for X, one for me.".
- Accumulate
- Implement the `accumulate` operation, which, given a collection and an operation to perform on each element of the collection, returns a new collection containing the result of applying that operation to each element of the input collection.
- Clock
- Implement a clock that handles times without dates.
- Darts
- Calculate the points scored in a single toss of a Darts game.
- Eliud's Eggs
- Help Eliud count the number of eggs in her chicken coop by counting the number of 1 bits in a binary representation.
- ETL
- Change the data format for scoring a game to more easily add other languages.
- Grains
- Calculate the number of grains of wheat on a chessboard given that the number on each square doubles.
- Hamming
- Calculate the Hamming distance between two DNA strands.
- High Scores
- Manage a player's High Score list.
- House
- Output the nursery rhyme 'This is the House that Jack Built'.
- Leap
- Determine whether a given year is a leap year.
- Pangram
- Determine if a sentence is a pangram.
- Raindrops
- Convert a number into its corresponding raindrop sounds - Pling, Plang and Plong.
- Resistor Color Duo
- Convert color codes, as used on resistors, to a numeric value.
- Secret Handshake
- Given a decimal number, convert it to the appropriate sequence of events for a secret handshake.
- Series
- Given a string of digits, output all the contiguous substrings of length `n` in that string.
- Space Age
- Given an age in seconds, calculate how old someone is in terms of a given planet's solar years.
- Strain
- Implement the `keep` and `discard` operation on collections.
- Triangle
- Determine if a triangle is equilateral, isosceles, or scalene.
- Anagram
- Given a word and a list of possible anagrams, select the correct sublist.
- Armstrong Numbers
- Determine if a number is an Armstrong number.
- Bob
- Bob is a lackadaisical teenager. In conversation, his responses are very limited.
- Collatz Conjecture
- Calculate the number of steps to reach 1 using the Collatz conjecture.
- Grade School
- Given students' names along with the grade that they are in, create a roster for the school.
- Isogram
- Determine if a word or phrase is an isogram.
- Kindergarten Garden
- Given a diagram, determine which plants each child in the kindergarten class is responsible for.
- Largest Series Product
- Given a string of digits, calculate the largest product for a contiguous substring of digits of length n.
- Matching Brackets
- Make sure the brackets and braces all match.
- Matrix
- Given a string representing a matrix of numbers, return the rows and columns of that matrix.
- Nth Prime
- Given a number n, determine what the nth prime is.
- Nucleotide Count
- Given a DNA string, compute how many times each nucleotide occurs in the string.
- Perfect Numbers
- Determine if a number is perfect, abundant, or deficient based on Nicomachus' (60 - 120 CE) classification scheme for positive integers.
- Pig Latin
- Implement a program that translates from English to Pig Latin.
- Protein Translation
- Translate RNA sequences into proteins.
- Proverb
- For want of a horseshoe nail, a kingdom was lost, or so the saying goes. Output the full text of this proverbial rhyme.
- Queen Attack
- Given the position of two queens on a chess board, indicate whether or not they are positioned so that they can attack each other.
- Resistor Color Trio
- Convert color codes, as used on resistors, to a human-readable label.
- Robot Simulator
- Write a robot simulator.
- Roman Numerals
- Convert modern Arabic numbers into Roman numerals.
- Twelve Days
- Output the lyrics to 'The Twelve Days of Christmas'.
- Acronym
- Convert a long phrase to its acronym.
- All Your Base
- Convert a number, represented as a sequence of digits in one base, to any other base.
- Allergies
- Given a person's allergy score, determine whether or not they're allergic to a given item, and their full list of allergies.
- Atbash Cipher
- Create an implementation of the Atbash cipher, an ancient encryption system created in the Middle East.
- Binary Search Tree
- Insert and search for numbers in a binary tree.
- D&D Character
- Randomly generate Dungeons & Dragons characters.
- Flatten Array
- Take a nested list and return a single list with all values except nil/null.
- ISBN Verifier
- Check if a given string is a valid ISBN-10 number.
- Killer Sudoku Helper
- Write a tool that makes it easier to solve Killer Sudokus
- Knapsack
- Given a knapsack that can only carry a certain weight, determine which items to put in the knapsack in order to maximize their combined value.
- OCR Numbers
- Given a 3 x 4 grid of pipes, underscores, and spaces, determine which number is represented, or whether it is garbled.
- Pascal's Triangle
- Compute Pascal's triangle up to a given number of rows.
- Phone Number
- Clean up user-entered phone numbers so that they can be sent SMS messages.
- Prime Factors
- Compute the prime factors of a given natural number.
- Saddle Points
- Detect saddle points in a matrix.
- Satellite
- Rebuild binary trees from pre-order and in-order traversals.
- Scrabble Score
- Given a word, compute the Scrabble score for that word.
- Sieve
- Use the Sieve of Eratosthenes to find all the primes from 2 up to a given number.
- Square Root
- Given a natural radicand, return its square root.
- Sum of Multiples
- Given a number, find the sum of all the multiples of particular numbers up to but not including that number.
- Word Count
- Given a phrase, count the occurrences of each word in that phrase.
- Yacht
- Score a single throw of dice in the game Yacht.
- 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.
- Bottle Song
- Produce the lyrics to the popular children's repetitive song: Ten Green Bottles.
- Circular Buffer
- A data structure that uses a single, fixed-size buffer as if it were connected end-to-end.
- Crypto Square
- Implement the classic method for composing secret messages called a square code.
- Custom Set
- Create a custom set type.
- Flower Field
- Mark all the flowers in a garden.
- Luhn
- Given a number determine whether or not it is valid per the Luhn formula.
- Rotational Cipher
- Create an implementation of the rotational cipher, also sometimes called the Caesar cipher.
- Run-Length Encoding
- Implement run-length encoding and decoding.
- Say
- Given a number from 0 to 999,999,999,999, spell out that number in English.
- Simple Cipher
- Implement the Vigenère cipher, a simple substitution cipher.
- Sublist
- Write a function to determine if a list is a sublist of another list.
- Tournament
- Tally the results of a small football competition.
- Variable Length Quantity
- Implement variable length quantity encoding and decoding.
- Affine Cipher
- Create an implementation of the Affine cipher, an ancient encryption algorithm from the Middle East.
- Bowling
- Score a bowling game.
- Change
- Correctly determine change to be given using the least number of coins.
- List Ops
- Implement basic list operations.
- Pythagorean Triplet
- Given an integer N, find all Pythagorean triplets for which a + b + c = N.
- Rectangles
- Count the rectangles in an ASCII diagram.
- Zipper
- Creating a zipper for a binary tree.
- Connect
- Compute the result for a game of Hex / Polygon.
- Dominoes
- Make a chain of dominoes.
- Alphametics
- Given an alphametics puzzle, find the correct solution.
- Diamond
- Given a letter, print a diamond starting with 'A' with the supplied letter at the widest point.
- POV
- Reparent a graph on a selected node.
- Wordy
- Parse and evaluate simple math word problems returning the answer as an integer.
- Forth
- Implement an evaluator for a very simple subset of Forth.
