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Exercism

Red

via Exercism

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Overview

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Red's characteristics mostly come from the fact, that the basis of its creation was Rebol, and Red's development started as an open source community alternative. In the meantime, Rebol's development has stopped, and Red is constantly evolving. Rebol legacy

Syllabus

  • Hello World
    • Exercism's classic introductory exercise. Just say "Hello, World!".
  • 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.
  • Binary Search
    • Implement a binary search algorithm.
  • 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.
  • 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.
  • ETL
    • Change the data format for scoring a game to more easily add other languages.
  • Gigasecond
    • Given a moment, determine the moment that would be after a gigasecond has passed.
  • 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.
  • Leap
    • Determine whether a given year is a leap year.
  • Nucleotide Count
    • Given a DNA string, compute how many times each nucleotide occurs in the string.
  • Nth Prime
    • Given a number n, determine what the nth prime is.
  • Pangram
    • Determine if a sentence is a pangram.
  • Phone Number
    • Clean up user-entered phone numbers so that they can be sent SMS messages.
  • Protein Translation
    • Translate RNA sequences into proteins.
  • 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 Transcription.
  • 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.
  • 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.
  • Triangle
    • Determine if a triangle is equilateral, isosceles, or scalene.
  • Two Fer
    • Create a sentence of the form "One for X, one for me.".
  • Yacht
    • Score a single throw of dice in the game Yacht.
  • Bottle Song
    • Produce the lyrics to the popular children's repetitive song: Ten Green Bottles.
  • Darts
    • Calculate the points scored in a single toss of a Darts game.
  • D&D Character
    • Randomly generate Dungeons & Dragons characters.
  • Flower Field
    • Mark all the flowers in a garden.
  • Matching Brackets
    • Make sure the brackets and braces all match.
  • High Scores
    • Manage a player's High Score list.
  • Largest Series Product
    • Given a string of digits, calculate the largest product for a contiguous substring of digits of length n.
  • Roman Numerals
    • Convert modern Arabic numbers into Roman numerals.
  • Rotational Cipher
    • Create an implementation of the rotational cipher, also sometimes called the Caesar cipher.
  • Run-Length Encoding
    • Implement run-length encoding and decoding.
  • SGF Parsing
    • Parsing a Smart Game Format string.
  • Simple Linked List
    • Write a simple linked list implementation that uses Elements and a List.
  • Bowling
    • Score a bowling game.
  • Circular Buffer
    • A data structure that uses a single, fixed-size buffer as if it were connected end-to-end.
  • POV
    • Reparent a graph on a selected node.
  • Acronym
    • Convert a long phrase to its acronym.

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