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Overview
Syllabus
- Hello World
- Exercism's classic introductory exercise. Just say "Hello, World!".
- Acronym
- Convert a long phrase to its acronym.
- Allergies
- Given a person's allergy score, determine whether or not they're allergic to a given item, and their full list of allergies.
- Anagram
- Given a word and a list of possible anagrams, select the correct sublist.
- Armstrong Numbers
- Determine if a number is an Armstrong number.
- Atbash Cipher
- Create an implementation of the Atbash cipher, an ancient encryption system created in the Middle East.
- Bank Account
- Simulate a bank account supporting opening/closing, withdraws, and deposits of money. Watch out for concurrent transactions!
- 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.
- Darts
- Calculate the points scored in a single toss of a Darts game.
- Difference of Squares
- Find the difference between the square of the sum and the sum of the squares of the first N natural numbers.
- ETL
- Change the data format for scoring a game to more easily add other languages.
- Flatten Array
- Take a nested list and return a single list with all values except nil/null.
- 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.
- Isogram
- Determine if a word or phrase is an isogram.
- Leap
- Determine whether a given year is a leap year.
- List Ops
- Implement basic list operations.
- Luhn
- Given a number determine whether or not it is valid per the Luhn formula.
- Matrix
- Given a string representing a matrix of numbers, return the rows and columns of that matrix.
- Nucleotide Count
- Given a DNA string, compute how many times each nucleotide occurs in the string.
- Pangram
- Determine if a sentence is a pangram.
- Perfect Numbers
- Determine if a number is perfect, abundant, or deficient based on Nicomachus' (60 - 120 CE) classification scheme for positive integers.
- Phone Number
- Clean up user-entered phone numbers so that they can be sent SMS messages.
- 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.
- Line Up
- Help lining up customers at Yaʻqūb's Deli.
- 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.
- Raindrops
- Convert a number into its corresponding raindrop sounds - Pling, Plang and Plong.
- Resistor Color
- Convert a resistor band's color to its numeric representation.
- Resistor Color Duo
- Convert color codes, as used on resistors, to a numeric value.
- Resistor Color Trio
- Convert color codes, as used on resistors, to a human-readable label.
- Reverse String
- Reverse a given string.
- RNA Transcription
- Given a DNA strand, return its RNA complement.
- Roman Numerals
- Convert modern Arabic numbers into Roman numerals.
- Scrabble Score
- Given a word, compute the Scrabble score for that word.
- 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.
- Simple Linked List
- Write a simple linked list implementation that uses Elements and a List.
- Space Age
- Given an age in seconds, calculate how old someone is in terms of a given planet's solar years.
- Triangle
- Determine if a triangle is equilateral, isosceles, or scalene.
- Square Root
- Given a natural radicand, return its square root.
- Strain
- Implement the `keep` and `discard` operation on collections.
- Word Count
- Given a phrase, count the occurrences of each word in that phrase.
- Two Fer
- Create a sentence of the form "One for X, one for me.".
- Circular Buffer
- A data structure that uses a single, fixed-size buffer as if it were connected end-to-end.
- Clock
- Implement a clock that handles times without dates.
- D&D Character
- Randomly generate Dungeons & Dragons characters.
- Robot Simulator
- Write a robot simulator.
- Sieve
- Use the Sieve of Eratosthenes to find all the primes from 2 up to a given number.
