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var Zoo = function(animals) {
  this.animals = animals;
};

Zoo.prototype = {
  bipeds: function() {
    return this.legFilter(2);
  },
  quadrupeds: function() {
    return this.legFilter(4);

Cfeusier

// recursive reimplementation of JSON.stringify
var stringifyJSON = function(obj) {

  // null
  if (obj === null) {
    return "null";
  }

  // unstringifiable - functions and undefined
  if (obj === undefined || obj.constructor === Function) { return; }

Cfeusier

var getElementsByClassName = function(className, node) {
  var matches = [];

  // top of node tree or default to body
  node = node || document.body;

  // get all classNames of node
  var nodeClasses = node.className.split(" ");

  // push node if node has className in classList

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var parseJSON = function(json) {

  // setup
  var idx = 0;
  var cc = ' ';
  var escapee = {
    '"':  '"',
    '\\': '\\',
    '/':  '/',
    b:    '\b',

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var Example = function() {
  var example = Object.create(exampleMethods);
  example.extraProp1 = "Example Property Value";
  return example;
};

var exampleMethods = {
  exampleGet: function() {
    return this.extraProp1;
  },

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var Example = function() {
  var example = {};
  var extraState = "Example Property Value";
  
  example.exampleGet = function() {
    return extraState;
  };
  
  example.exampleSet = function(value) {
    extraState = value;

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var Example = function() {
  var example = {};
  example.extraProp1 = "Example Property Value";
  _.extend(example, exampleMethods); // requires _ library or implement your own extend function
  return example;
};
 
var exampleMethods = {
  exampleGet: function() {
    return this.extraProp1;

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var Example = function() {
  this.extraProp1 = "Example Property Value";
};
 
Example.prototype.exampleGet = function() {
  return this.extraProp1;
};

Example.prototype.exampleSet = function(value) {
  this.extraProp1 = value;

Cfeusier

var HashTable = function() {
  this._limit = 8; // choose any size of hash table bucket limit
  this._count = 0;
  this._storage = [];
};

HashTable.prototype.insert = function(k, v) {
  var i = this._getHashIndex(k, this._limit);
  this._checkLimit(i); // make sure hashidx is in bounds
  var bucket = this._storage[i];

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var Tree = function(value) {
  var newTree = {};
  newTree.value = value;
  newTree.children = [];
  _.extend(newTree, treeMethods);
  return newTree;
};

var treeMethods = {};