The "Kart Randomizer": mode, characters, and levels randomizer for Mario Kart 64

index.js

var characters = [
  'Donkey Kong',
  'Wario',
  'Mario',
  'Luigi',
  'Peach',
  'Toad',
  'Bowser',
  'Yoshi'
];

var ccs = [
  '50cc',
  '100cc',
  '150cc',
  'Extra'
];

var levels = [
  'Luigi Raceway',
  'Moo Moo Farm',
  'Koopa Troopa Beach',
  'Kalimari Desert',
  'Toad\'s Turnpike',
  'Frappe Snowland',
  'Choco Mountain',
  'Mario Raceway',
  'Wario Stadium',
  'Sherbet Land',
  'Royal Raceway',
  'Bowser\'s Castle',
  'D.K.\'s Jungle Parkway',
  'Yoshi Valley',
  'Banshee Boardwalk',
  'Rainbow Road'
];

// keep a mutable clone of the levels, so that we don't run into duplicates
var currentLevels = levels.slice();

function random (set) {
  return set[set.length * Math.random() | 0];
}

function randomAndRemove (set) {
  var val = random(set);
  set.splice(set.indexOf(val), 1);
  return val;
}

console.log('\033[1m\033[33mMode\033[39m:\033[22m %s', random(ccs));
console.log('\033[1m\033[36mPlayer 1\033[39m:\033[22m %s', randomAndRemove(characters));
console.log('\033[1m\033[31mPlayer 2\033[39m:\033[22m %s', randomAndRemove(characters));
console.log('\033[1m\033[32mPlayer 3\033[39m:\033[22m %s', randomAndRemove(characters));
console.log('\033[1m\033[34mPlayer 4\033[39m:\033[22m %s', randomAndRemove(characters));
getLevel();

function getLevel () {
  if (currentLevels.length === 0) {
    currentLevels = levels.slice();
  }
  console.log('\033[1mLevel:\033[22m %s', randomAndRemove(currentLevels));
}

process.stdin.setRawMode(true);
process.stdin.on('data', function (b) {
  if (b[0] == 3 || b[0] == 4) {
    // quit upon Ctrl+C or Ctrl+D
    return process.stdin.pause();
  }
  getLevel();
});
process.stdin.resume();

Quick little 5-minute program for the office.

Example output: