zoo.js

// jQuery.each( collection, callback(indexInArray, valueOfElement) )
  // bipeds: function(){
  //   $.each(this.animals, function(index, animal){
  //     var sum = 0
  //     if(animal.legs === 2)
  //     {
  //       sum += 1
  //       return sum
  //     }

  //   })
  // }



 //  quadrupeds: function(){
 //   $.each(this.animals, function(index, animal){
 //    var sum = 0
 //    if(animal.legs === 2)
 //    {
 //      sum += 1
 //      return sum
 //    }

 //  })

 // }


 function Animal(type, limbs){
  this.name = type
  this.legs = limbs
};

Animal.prototype.identify = function(){
  var species = ""+this.name.toLowerCase()+"s"

  return "I am a "+this.name+"with "+this.legs+"," +species+ "have " +this.legs+ "legs"
};

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;
    });
  }


  // bipeds: function(){
  //   var animal_array = $.makeArray(this.animals)
  //   $.map(this.animals, function(animal, i){

  //     if(animal.legs === 2)
  //     {
  //       return animal.legs
  //     }

  //   })
  // },


  // quadrupeds: function(){
  //   $.map(this.animals, function(animal, i){
  //     if(animal.legs === 4)
  //     {
  //       return animal.legs
  //     }

  //   })
  // }


}

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"
  );