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Overview
Syllabus
- Hello World
- Exercism's classic introductory exercise. Just say "Hello, World!".
- 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.
- Leap
- Determine whether a given year is a leap year.
- 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.".
- 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.
- 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.
- 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.
- 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.
- Isogram
- Determine if a word or phrase is an isogram.
- Micro Blog
- Given an input string, truncate it to 5 characters.
- Pangram
- Determine if a sentence is a pangram.
- Raindrops
- Convert a number into its corresponding raindrop sounds - Pling, Plang and Plong.
- Scrabble Score
- Given a word, compute the Scrabble score for that word.
- Space Age
- Given an age in seconds, calculate how old someone is in terms of a given planet's solar years.
- 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.
- Triangle
- Determine if a triangle is equilateral, isosceles, or scalene.
- Flatten Array
- Take a nested list and return a single list with all values except nil/null.
- Line Up
- Help lining up customers at Yaʻqūb's Deli.
- 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.
- 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.
- 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.
- Rotational Cipher
- Create an implementation of the rotational cipher, also sometimes called the Caesar cipher.
- Secret Handshake
- Given a decimal number, convert it to the appropriate sequence of events for a secret handshake.
- All Your Base
- Convert a number, represented as a sequence of digits in one base, to any other base.
- Atbash Cipher
- Create an implementation of the Atbash cipher, an ancient encryption system created in the Middle East.
- Binary Search
- Implement a binary search algorithm.
- ISBN Verifier
- Check if a given string is a valid ISBN-10 number.
- 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.
- List Ops
- Implement basic list operations.
- Luhn
- Given a number determine whether or not it is valid per the Luhn formula.
- Matching Brackets
- Make sure the brackets and braces all match.
- Robot Simulator
- Write a robot simulator.
- Roman Numerals
- Convert modern Arabic numbers into Roman numerals.
- Run-Length Encoding
- Implement run-length encoding and decoding.
- Sieve
- Use the Sieve of Eratosthenes to find all the primes from 2 up to a given number.
- Nth Prime
- Given a number n, determine what the nth prime is.
- Pythagorean Triplet
- Given an integer N, find all Pythagorean triplets for which a + b + c = N.
- 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.
- Meetup
- Calculate the date of meetups.
- 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.
- Dominoes
- Make a chain of dominoes.
- Conway's Game of Life
- Implement Conway's Game of Life.
- Lens Person
- Use lenses to update nested records (specific to languages with immutable data).
- Satellite
- Rebuild binary trees from pre-order and in-order traversals.
- Zebra Puzzle
- Solve the zebra puzzle.
