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Exercism

Vim script

via Exercism

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Overview

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Vim is a decades old text editor that is still wildly popular among programmers and people who like working in terminal emulators. In Vim, keys don't always do the same things. It depends in which mode you're in. You constantly switch between modes: there is a mode for navigation, a mode for insertion, a mode for selecting regions of text, a mode for entering commands, and so on. This sounds complicated, but you quickly get used to it.

Syllabus

  • Hello World
    • Exercism's classic introductory exercise. Just say "Hello, World!".
  • Acronym
    • Convert a long phrase to its acronym.
  • 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.
  • Bottle Song
    • Produce the lyrics to the popular children's repetitive song: Ten Green Bottles.
  • Clock
    • Implement a clock that handles times without dates.
  • Collatz Conjecture
    • Calculate the number of steps to reach 1 using the Collatz conjecture.
  • Conway's Game of Life
    • Implement Conway's Game of Life.
  • 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.
  • D&D Character
    • Randomly generate Dungeons & Dragons characters.
  • 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.
  • 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.
  • High Scores
    • Manage a player's High Score list.
  • ISBN Verifier
    • Check if a given string is a valid ISBN-10 number.
  • 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.
  • Leap
    • Determine whether a given year is a leap year.
  • Line Up
    • Help lining up customers at YaÊ»qÅ«b's Deli.
  • Luhn
    • Given a number determine whether or not it is valid per the Luhn formula.
  • List Ops
    • Implement basic list operations.
  • Matrix
    • Given a string representing a matrix of numbers, return the rows and columns of that matrix.
  • Micro Blog
    • Given an input string, truncate it to 5 characters.
  • Nth Prime
    • Given a number n, determine what the nth prime is.
  • 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.
  • Prime Factors
    • Compute the prime factors of a given natural number.
  • Proverb
    • For want of a horseshoe nail, a kingdom was lost, or so the saying goes. Output the full text of this proverbial rhyme.
  • 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.
  • Run-Length Encoding
    • Implement run-length encoding and decoding.
  • Robot Name
    • Manage robot factory settings.
  • Robot Simulator
    • Write a robot simulator.
  • Roman Numerals
    • Convert modern Arabic numbers into Roman numerals.
  • Rotational Cipher
    • Create an implementation of the rotational cipher, also sometimes called the Caesar cipher.
  • Saddle Points
    • Detect saddle points in a matrix.
  • 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.
  • Sieve
    • Use the Sieve of Eratosthenes to find all the primes from 2 up to a given number.
  • Space Age
    • Given an age in seconds, calculate how old someone is in terms of a given planet's solar years.
  • State of Tic-Tac-Toe
    • Determine the game state of a match of Tic-Tac-Toe.
  • Strain
    • Implement the `keep` and `discard` operation on collections.
  • Square Root
    • Given a natural radicand, return its square root.
  • Sublist
    • Write a function to determine if a list is a sublist of another list.
  • Sum of Multiples
    • Given a number, find the sum of all the multiples of particular numbers up to but not including that number.
  • Tournament
    • Tally the results of a small football competition.
  • Triangle
    • Determine if a triangle is equilateral, isosceles, or scalene.
  • Twelve Days
    • Output the lyrics to 'The Twelve Days of Christmas'.
  • Two-Fer
    • Create a sentence of the form "One for X, one for me.".
  • 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.
  • 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.
  • Allergies
    • Given a person's allergy score, determine whether or not they're allergic to a given item, and their full list of allergies.
  • All Your Base
    • Convert a number, represented as a sequence of digits in one base, to any other base.
  • Anagram
    • Given a word and a list of possible anagrams, select the correct sublist.
  • Camicia
    • Simulate the card game and determine whether the match ends or enters an infinite loop.
  • Change
    • Correctly determine change to be given using the least number of coins.
  • Circular Buffer
    • A data structure that uses a single, fixed-size buffer as if it were connected end-to-end.
  • Custom Set
    • Create a custom set type.
  • Diamond
    • Given a letter, print a diamond starting with 'A' with the supplied letter at the widest point.
  • Flower Field
    • Mark all the flowers in a garden.
  • Grade School
    • Given students' names along with the grade that they are in, create a roster for the school.
  • Hamming
    • Calculate the Hamming distance between two DNA strands.
  • House
    • Output the nursery rhyme 'This is the House that Jack Built'.
  • Matching Brackets
    • Make sure the brackets and braces all match.
  • Nucleotide Count
    • Given a DNA string, compute how many times each nucleotide occurs in the string.
  • Pascal's Triangle
    • Compute Pascal's triangle up to a given number of rows.
  • Pig Latin
    • Implement a program that translates from English to Pig Latin.
  • Prism
    • Calculate the path of a laser through refractive prisms.
  • Relative Distance
    • Given a family tree, calculate the degree of separation.
  • Say
    • Given a number from 0 to 999,999,999,999, spell out that number in English.
  • Simple Linked List
    • Write a simple linked list implementation that uses Elements and a List.
  • Spiral Matrix
    • Given the size, return a square matrix of numbers in spiral order.
  • Transpose
    • Take input text and output it transposed.
  • Two Bucket
    • Given two buckets of different size, demonstrate how to measure an exact number of liters.
  • Food Chain
    • Generate the lyrics of the song 'I Know an Old Lady Who Swallowed a Fly'.

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