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Forked from dbc-challenges/zoo.js
Last active December 20, 2015 05:39
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//------------------------------------------------------------------------------------------------------------------
// YOUR CODE: Create your Zoo "object literal" and Animal "constructor" and "prototypes" here.
//------------------------------------------------------------------------------------------------------------------
var Zoo = {
init : function(animals){
this.animals = animals
},
bipeds : function(){
return this.animals.filter(function(element){
return (element.legs == 2);
})
},
quadrupeds : function(){
return animals.filter(function(element){
return (element.legs == 4);
})
},
};
function Animal(name, legs){
this.name = name;
this.legs = legs;
this.identify = function(){
if (this.name == "Human") {
return "I am a "+ this.name +" with "+ this.legs +" legs.";
}
};
};
Human.prototype = Animal;
//------------------------------------------------------------------------------------------------------------------
// 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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