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@benneuman
Forked from dbc-challenges/zoo.js
Last active August 29, 2015 13:56
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//------------------------------------------------------------------------------------------------------------------
// YOUR CODE: Create your Zoo "object literal" and Animal "constructor" and "prototypes" here.
//------------------------------------------------------------------------------------------------------------------
//-----------------------------------OBJECT CONSTRTUCTOR-------------------------------------------//
function Animal(name, num_legs) {
this.name = name;
this.num_legs = num_legs;
}
//-----------------------------------OBJECT PROTOTYPE----------------------------------------------//
Animal.prototype.identify = function () {
return "I am a " + this.name + " with " + this.num_legs + " legs.";
}
//------------------------------------OBJECT LITERAL----------------------------------------------//
var Zoo = {
animals: [],
init: function (animal_list) {
for (i = 0; i < animal_list.length; i++) {
this.animals.push(animal_list[i]);
}
},
bipeds: function () {
accum = [];
for (i = 0; i < this.animals.length; i++) {
animal = this.animals[i];
if (animal.num_legs == 2) {
accum.push(animal);
}
}
return accum;
},
quadrupeds: function () {
accum = [];
for (i = 0; i < this.animals.length; i++) {
animal = this.animals[i];
if (animal.num_legs == 4) {
accum.push(animal);
}
}
return accum;
}
}
//------------------------------------------------------------------------------------------------------------------
// 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"
);
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