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Forked from dbc-challenges/zoo.js
Last active December 16, 2015 22:09
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//------------------------------------------------------------------------------------------------------------------
// YOUR CODE: Create your Zoo "object literal" and Animal "constructor" and "prototypes" here.
//------------------------------------------------------------------------------------------------------------------
function Animal(name, legs){
this.name = name,
this.legs = legs
}
Animal.prototype = {
identify: function(){
"I am a" + name + "with" + legs + "legs."}
}
var Zoo = {
init: function(animals) {
this.animals = animals
},
bipeds: function() {
},
quadrupeds: function(){
}
};
Zoo.prototype = {
init: function(animals) {
this.animals = animals
},
bipeds: function() {
this.animals.filter(function(animal){
return animal.legs === 2;
});
},
quadrupeds: function() {
var result = [];
for (x in this.animals) {
if (animals[x].legs === 4) { result.push(animals[x]);
};
};
return result;
},
}
Zoo = new Zoo()
//------------------------------------------------------------------------------------------------------------------
// 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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