Playing around after an article

encoder.js

// http://coding.smashingmagazine.com/2011/10/19/optimizing-long-lists-of-yesno-values-with-javascript/

var Encoder = (function () {
  
  var Encoder = function (trueValue) {
    this.trueValue = trueValue;
  };
  
  Encoder.prototype = {
    encode: function (list) {
      var trueValue = this.trueValue;
      
      return list.map(function (value) {
        return value === trueValue ? 1 : 0;
      }).join("").match(/.{1,16}/g).map(function (chunk) {
        return String.fromCharCode(parseInt(chunk, 2));
      }).join("");
    },
    
    decode: function (encoded) {
      return encoded.split("").map(function (char) {
        return char.charCodeAt(0).toString(2);
      }).join("").split("");
    }
  };
  
  return Encoder;
  
}());

var test = ["Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No", "Yes", "No", "Yes", "Yes", "No"];

var encoder = new Encoder("Yes");
var encoded = encoder.encode(test);
var decoded = encoder.decode(encoded);

console.log(encoded, decoded);