ctailor2 · December 27, 2015 16:49 · Nov 7, 2013 · Nov 7, 2013 · Nov 7, 2013 · May 1, 2013
diff --git a/zoo.js b/zoo.js
@@ -4,29 +4,35 @@
 
 
 function Animal(type, num_legs) {
-  this.type = type;
+  this.name = type;
   this.num_legs = num_legs
 }
 
 Animal.prototype.identify = function() {
-  console.log("I am a",this.type,"with",this.num_legs,"legs.")
+  return "I am a " + this.name + " with " + this.num_legs + " legs."
 }
 
-function Zoo() {
-  var zoo = this;
-  this.init() = function(animals){
-    zoo.animals = animals;
-  }
-}
+var Zoo = {
+  init: function(animals) {
+    this.animals = animals;
+  },
 
-Zoo.prototype.init = function(animals){
-  this.animals = animals;
-}
+  bipeds: function() {
+    bipeds = this.animals.filter(function(animal){
+      return animal.num_legs === 2;
+    });
+    return bipeds
+  },
 
-Zoo.prototype.bipeds = function(){
-  this.animals.filter(function{})
+  quadrupeds: function() {
+    quadrupeds = this.animals.filter(function(animal){
+      return animal.num_legs === 4;
+    });
+    return quadrupeds
+  },
 }
 
+
 //------------------------------------------------------------------------------------------------------------------
 // DRIVER CODE: Do **NOT** change anything below this point. Your task is to implement code above to make this work.
 //------------------------------------------------------------------------------------------------------------------

diff --git a/zoo.js b/zoo.js
@@ -12,7 +12,12 @@ Animal.prototype.identify = function() {
   console.log("I am a",this.type,"with",this.num_legs,"legs.")
 }
 
-function Zoo() {this.init()}
+function Zoo() {
+  var zoo = this;
+  this.init() = function(animals){
+    zoo.animals = animals;
+  }
+}
 
 Zoo.prototype.init = function(animals){
   this.animals = animals;

diff --git a/zoo.js b/zoo.js
@@ -3,6 +3,24 @@
 //------------------------------------------------------------------------------------------------------------------
 
 
+function Animal(type, num_legs) {
+  this.type = type;
+  this.num_legs = num_legs
+}
+
+Animal.prototype.identify = function() {
+  console.log("I am a",this.type,"with",this.num_legs,"legs.")
+}
+
+function Zoo() {this.init()}
+
+Zoo.prototype.init = function(animals){
+  this.animals = animals;
+}
+
+Zoo.prototype.bipeds = function(){
+  this.animals.filter(function{})
+}
 
 //------------------------------------------------------------------------------------------------------------------
 // DRIVER CODE: Do **NOT** change anything below this point. Your task is to implement code above to make this work.

diff --git a/zoo.js b/zoo.js
@@ -0,0 +1,43 @@
+//------------------------------------------------------------------------------------------------------------------
+// YOUR CODE: Create your Zoo "object literal" and Animal "constructor" and "prototypes" here.
+//------------------------------------------------------------------------------------------------------------------
+
+
+
+//------------------------------------------------------------------------------------------------------------------
+// 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"
+);