docker-namesgenerator/namesgenerator.js

Port of Docker 0.7.x namesgenerator from go to node.

// This is a port of the Docker 0.7.x go code that generates names from ntoable scientists and hackers.
// https://github.com/dotcloud/docker/blob/master/pkg/namesgenerator/names-generator.go
// docker license: Apache v 2.0 (https://github.com/dotcloud/docker/blob/master/LICENSE)

// Docker 0.7.x generates names from notable scientists and hackers.
//
// Ada Lovelace invented the first algorithm. http://en.wikipedia.org/wiki/Ada_Lovelace (thanks James Turnbull)
// Alan Turing was a founding father of computer science. http://en.wikipedia.org/wiki/Alan_Turing.
// Albert Einstein invented the general theory of relativity. http://en.wikipedia.org/wiki/Albert_Einstein
// Ambroise Pare invented modern surgery. http://en.wikipedia.org/wiki/Ambroise_Par%C3%A9
// Archimedes was a physicist, engineer and mathematician who invented too many things to list them here. http://en.wikipedia.org/wiki/Archimedes
// Benjamin Franklin is famous for his experiments in electricity and the invention of the lightning rod.
// Charles Babbage invented the concept of a programmable computer. http://en.wikipedia.org/wiki/Charles_Babbage.
// Charles Darwin established the principles of natural evolution. http://en.wikipedia.org/wiki/Charles_Darwin.
// Dennis Ritchie and Ken Thompson created UNIX and the C programming language. http://en.wikipedia.org/wiki/Dennis_Ritchie http://en.wikipedia.org/wiki/Ken_Thompson
// Douglas Engelbart gave the mother of all demos: http://en.wikipedia.org/wiki/Douglas_Engelbart
// Emmett Brown invented time travel. http://en.wikipedia.org/wiki/Emmett_Brown (thanks Brian Goff)
// Enrico Fermi invented the first nuclear reactor. http://en.wikipedia.org/wiki/Enrico_Fermi.
// Euclid invented geometry. http://en.wikipedia.org/wiki/Euclid
// Galileo was a founding father of modern astronomy, and faced politics and obscurantism to establish scientific truth.  http://en.wikipedia.org/wiki/Galileo_Galilei
// Henry Poincare made fundamental contributions in several fields of mathematics. http://en.wikipedia.org/wiki/Henri_Poincar%C3%A9
// Isaac Newton invented classic mechanics and modern optics. http://en.wikipedia.org/wiki/Isaac_Newton
// John McCarthy invented LISP: http://en.wikipedia.org/wiki/John_McCarthy_(computer_scientist)
// Leonardo Da Vinci invented too many things to list here. http://en.wikipedia.org/wiki/Leonardo_da_Vinci.
// Linus Torvalds invented Linux and Git. http://en.wikipedia.org/wiki/Linus_Torvalds
// Louis Pasteur discovered vaccination, fermentation and pasteurization. http://en.wikipedia.org/wiki/Louis_Pasteur.
// Malcolm McLean invented the modern shipping container: http://en.wikipedia.org/wiki/Malcom_McLean
// Marie Curie discovered radioactivity. http://en.wikipedia.org/wiki/Marie_Curie.
// Muhammad ibn Jābir al-Ḥarrānī al-Battānī was a founding father of astronomy. http://en.wikipedia.org/wiki/Mu%E1%B8%A5ammad_ibn_J%C4%81bir_al-%E1%B8%A4arr%C4%81n%C4%AB_al-Batt%C4%81n%C4%AB
// Niels Bohr is the father of quantum theory. http://en.wikipedia.org/wiki/Niels_Bohr.
// Nikola Tesla invented the AC electric system and every gaget ever used by a James Bond villain. http://en.wikipedia.org/wiki/Nikola_Tesla
// Pierre de Fermat pioneered several aspects of modern mathematics. http://en.wikipedia.org/wiki/Pierre_de_Fermat
// Richard Feynman was a key contributor to quantum mechanics and particle physics. http://en.wikipedia.org/wiki/Richard_Feynman
// Rob Pike was a key contributor to Unix, Plan 9, the X graphic system, utf-8, and the Go programming language. http://en.wikipedia.org/wiki/Rob_Pike
// Stephen Hawking pioneered the field of cosmology by combining general relativity and quantum mechanics. http://en.wikipedia.org/wiki/Stephen_Hawking
// Steve Wozniak invented the Apple I and Apple II. http://en.wikipedia.org/wiki/Steve_Wozniak
// Werner Heisenberg was a founding father of quantum mechanics. http://en.wikipedia.org/wiki/Werner_Heisenberg
// William Shockley, Walter Houser Brattain and John Bardeen co-invented the transistor (thanks Brian Goff).
//        http://en.wikipedia.org/wiki/John_Bardeen
//        http://en.wikipedia.org/wiki/Walter_Houser_Brattain
//        http://en.wikipedia.org/wiki/William_Shockley


var util = require('util')
  , left = [ "happy", "jolly", "dreamy", "sad", "angry", "pensive", "focused", "sleepy", "grave", "distracted", "determined", "stoic", "stupefied", "sharp", "agitated", "cocky", "tender", "goofy", "furious", "desperate", "hopeful", "compassionate", "silly", "lonely", "condescending", "naughty", "kickass", "drunk", "boring", "nostalgic", "ecstatic", "insane", "cranky", "mad", "jovial", "sick", "hungry", "thirsty", "elegant", "backstabbing", "clever", "trusting", "loving", "suspicious", "berserk", "high", "romantic", "prickly", "evil" ]
  , right = [ "lovelace", "franklin", "tesla", "einstein", "bohr", "davinci", "pasteur", "nobel", "curie", "darwin", "turing", "ritchie", "torvalds", "pike", "thompson", "wozniak", "galileo", "euclid", "newton", "fermat", "archimedes", "poincare", "heisenberg", "feynman", "hawking", "fermi", "pare", "mccarthy", "engelbart", "babbage", "albattani", "ptolemy", "bell", "wright", "lumiere", "morse", "mclean", "brown", "bardeen", "brattain", "shockley" ]
  ;

// module.exports = namesgenerator;

// Generates names from notable scientists and hackers.
// checker is a function that takes a name (string) and
// returns true if the name exists, else false.
// retries is the number to attempts to make to generate
// a random name before failing.
// Returns name or null if unable to generate a name that
// doesn't exist after the specified number of retries.
module.exports = function (checker) {
  var name
    , retry = arguments.length > 1 && typeof arguments[1] == 'number' ?
                  arguments[1] : 5;

  name = util.format('%s_%s', randelem(left), randelem(right));

  while (checker && checker(name) && retry) {
    name = util.format('%s%d', name, randnum(10));
    retry--;
  }
  
  return retry ? name : null;
};

function randnum(n) {
  var min = 0
    , max = n;

  return Math.floor(Math.random() * (max - min + 1) + min);
}

function randelem(a) {
  return a[randnum(a.length)];
}