2014-05-06-possibilities.md

Possibilities

Sorry, I have not really "fully" prepared anything today, but we do have stuff left over and I do have some things. (Just not fully prepared things. :)

Testing the time machine

Does it work? Did you finish it? Try explaining why it is a time machine and what your favourite time machine could do better. (And of course trying to implement that time machine would be the best.)

More questions:

• counting:
  • 1..101
  • 13..42
  • 47..-8
• working with arrays

  • put all those numbers you produced above into arrays

    var array = [];
    array.push(1); // => array == [1]
    
    array.push(2);
    array.push(21); // => array = [1, 2, 21]
    
    array[0]; // => 1
    array[1]; // => 2
    array[2]; // => ?
    

  • haveISeenYouBefore?

Simone

To run the functions below, put them in pipes and supply the appropriate input.

• tokenize: input: the base text you want to use, Project Gutenberg has a huge collection of public domain texts availlable.

  return input.split(/([\s,\.\?!]+)/).filter(function(s) { return s.match(/\w+|[,\.\?!]/); }).map(function(s) { return s.trim(); });
  

• generate dictionary: input is the output from tokenize

  var dict = {};
  
  var previousWord = null;
  for (var i = 0; i < input.length; i++) {
      var word = input[i];
      if (previousWord != null) {
          if (!dict[previousWord]) {
              dict[previousWord] = [];
          }
          dict[previousWord].push(word);
      }
      previousWord = word;
  
  }
  
  return dict;
  

• generate sentence

  function chooseRandom(obj) {
      var keys = Object.keys(obj);
      var length = keys.length;
      var key = keys[Math.floor(Math.random() * length)];
      return obj[key];
  }
  
  var sentence = "";
  var currentWord = chooseRandom(Object.keys(input));
  for (var l = 0; ; l++) {
      sentence += currentWord + " ";
      var followWords = input[currentWord];
      if (currentWord == "." || followWords.length == 0) {
          break;
      }
      currentWord = chooseRandom(followWords);
  }
  
  return sentence;
  

Other things

• interact with functions

• babl, a (very) simple chat server

  we can write code that says things here:

  ws.onmessage = makeListener(function(msg) {
      sendMessage(msg.content + " yourself!");
  });
  

• SuperCollider