mikelikesbikes/index.html

## index.html
<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
  <script src="./zoo.js"></script>
</head>
<body>
</body>
</html>

## zoo.js
//------------------------------------------------------------------------------------------------------------------
// YOUR CODE: Create your Zoo "object literal" and Animal "constructor" and "prototypes" here.
//------------------------------------------------------------------------------------------------------------------
// Constructor Function (class for creating objects)
function Animal(name, legs) {
  this.name = name;
  this.legs = legs;
}

Animal.prototype.identify = function() {
  return "I am a " + this.name + " with " + this.legs + " legs.";
}

// Object Literal
var Zoo = {
  init: function(animals) {
    this.animals = animals
  },
  bipeds: function() {
    return this.animals.filter(function(animal) {
      return animal.legs === 2;
    });
  },
  quadrupeds: function() {
    return this.animals.filter(function(animal) {
      return animal.legs === 4;
    });
  }
};

//------------------------------------------------------------------------------------------------------------------
// DRIVER CODE: Do **NOT** change anything below this point. Your task is to implement code above to make this work.
//------------------------------------------------------------------------------------------------------------------

function assert(test, message) {
  if (!test) {
    throw "ERROR: " + message;
  }
  return true;
}

var animals = [
  new Animal("Human", 2),
  new Animal("Monkey", 2),
  new Animal("Kangaroo", 2),
  new Animal("Horse", 4),
  new Animal("Cow", 4),
  new Animal("Centipede", 100)
];

Zoo.init(animals);

assert(
  Zoo.bipeds().length === 3, "the Zoo should have 3 bipeds"
);
assert(
  Zoo.quadrupeds().length === 2, "the Zoo should have 2 bipeds"
);
assert(
  animals[0].identify() === "I am a Human with 2 legs.", "humans have 2 legs"
);
assert(
  animals[2].name === "Kangaroo", "expected 'Kangaroo'"
);
assert(
  animals[0].identify === animals[5].identify, "only one implementation of the identify() function should exist"
);
	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<script src="./zoo.js"></script>
	</head>
	<body>
	</body>
	</html>
	//------------------------------------------------------------------------------------------------------------------
	// YOUR CODE: Create your Zoo "object literal" and Animal "constructor" and "prototypes" here.
	//------------------------------------------------------------------------------------------------------------------
	// Constructor Function (class for creating objects)
	function Animal(name, legs) {
	this.name = name;
	this.legs = legs;
	}

	Animal.prototype.identify = function() {
	return "I am a " + this.name + " with " + this.legs + " legs.";
	}

	// Object Literal
	var Zoo = {
	init: function(animals) {
	this.animals = animals
	},
	bipeds: function() {
	return this.animals.filter(function(animal) {
	return animal.legs === 2;
	});
	},
	quadrupeds: function() {
	return this.animals.filter(function(animal) {
	return animal.legs === 4;
	});
	}
	};

	//------------------------------------------------------------------------------------------------------------------
	// DRIVER CODE: Do NOT change anything below this point. Your task is to implement code above to make this work.
	//------------------------------------------------------------------------------------------------------------------

	function assert(test, message) {
	if (!test) {
	throw "ERROR: " + message;
	}
	return true;
	}

	var animals = [
	new Animal("Human", 2),
	new Animal("Monkey", 2),
	new Animal("Kangaroo", 2),
	new Animal("Horse", 4),
	new Animal("Cow", 4),
	new Animal("Centipede", 100)
	];

	Zoo.init(animals);

	assert(
	Zoo.bipeds().length === 3, "the Zoo should have 3 bipeds"
	);
	assert(
	Zoo.quadrupeds().length === 2, "the Zoo should have 2 bipeds"
	);
	assert(
	animals[0].identify() === "I am a Human with 2 legs.", "humans have 2 legs"
	);
	assert(
	animals[2].name === "Kangaroo", "expected 'Kangaroo'"
	);
	assert(
	animals[0].identify === animals[5].identify, "only one implementation of the identify() function should exist"
	);