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Exercism

OCaml

via Exercism

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Overview

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OCaml is an industrial strength programming language supporting functional, imperative and object-oriented styles - but don't worry if you're not familiar with these, as it's used as a teaching language by a lot of institutions (including Cornell and Princeton). One of the best features of OCaml is the rich and powerful type system - this is useful to catch some mistakes early on saving developers a huge amount of frustration. Also, relieves developers from having to specify types in the code - the compiler will work these out for you!

Syllabus

  • Hello World
    • Exercism's classic introductory exercise. Just say "Hello, World!".
  • Leap
    • Determine whether a given year is a leap year.
  • Armstrong Numbers
    • Determine if a number is an Armstrong number.
  • 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.
  • Hamming
    • Calculate the Hamming distance between two DNA strands.
  • Nucleotide Count
    • Given a DNA string, compute how many times each nucleotide occurs in the string.
  • Raindrops
    • Convert a number into its corresponding raindrop sounds - Pling, Plang and Plong.
  • Reverse String
    • Reverse a given string.
  • RNA Transcription
    • Given a DNA strand, return its RNA complement.
  • Sieve
    • Use the Sieve of Eratosthenes to find all the primes from 2 up to a given number.
  • Two-Fer
    • Create a sentence of the form "One for X, one for me.".
  • 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.
  • Binary Search Tree
    • Insert and search for numbers in a binary tree.
  • 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.
  • ETL
    • Change the data format for scoring a game to more easily add other languages.
  • Grade School
    • Given students' names along with the grade that they are in, create a roster for the school.
  • ISBN Verifier
    • Check if a given string is a valid ISBN-10 number.
  • Isogram
    • Determine if a word or phrase is an isogram.
  • Pangram
    • Determine if a sentence is a pangram.
  • 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.
  • Scrabble Score
    • Given a word, compute the Scrabble score for that word.
  • Triangle
    • Determine if a triangle is equilateral, isosceles, or scalene.
  • All Your Base
    • Convert a number, represented as a sequence of digits in one base, to any other base.
  • Beer Song
    • Produce the lyrics to that beloved classic, that field-trip favorite: 99 Bottles of Beer on the Wall.
  • Binary Search
    • Implement a binary search algorithm.
  • 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.
  • 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.
  • 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.
  • 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.
  • D&D Character
    • Randomly generate Dungeons & Dragons characters.
  • Nth Prime
    • Given a number n, determine what the nth prime is.
  • Prime Factors
    • Compute the prime factors of a given natural number.
  • Roman Numerals
    • Convert modern Arabic numbers into Roman numerals.
  • 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.
  • Change
    • Correctly determine change to be given using the least number of coins.
  • List Ops
    • Implement basic list operations.
  • Palindrome Products
    • Detect palindrome products in a given range.
  • Rectangles
    • Count the rectangles in an ASCII diagram.
  • Robot Name
    • Manage robot factory settings.
  • Atbash Cipher
    • Create an implementation of the Atbash cipher, an ancient encryption system created in the Middle East.
  • Bowling
    • Score a bowling game.
  • Dominoes
    • Make a chain of dominoes.
  • Flower Field
    • Mark all the flowers in a garden.
  • Connect
    • Compute the result for a game of Hex / Polygon.
  • Custom Set
    • Create a custom set type.
  • Forth
    • Implement an evaluator for a very simple subset of Forth.
  • Meetup
    • Calculate the date of meetups.
  • Hangman
    • Implement the logic of the hangman game using functional reactive programming.
  • React
    • Implement a basic reactive system.
  • Zipper
    • Creating a zipper for a binary tree.

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