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<html> | |
<head> | |
</head> | |
<script src="zoo.js"></script> | |
<script> | |
function init() { | |
console.log("I'm here!!"); | |
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) | |
]; | |
animals[0].identify(); | |
var zoo = new Zoo; | |
zoo.init(animals); | |
console.log(zoo.bipeds().length==3); | |
console.log(zoo.quadrupeds().length==2); | |
} | |
</script> | |
<body onload="init()"> | |
</body> | |
</html> |
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//------------------------------------------------------------------------------------------------------------------ | |
// YOUR CODE: Create your Zoo "object literal" and Animal "constructor" and "prototypes" here. | |
//------------------------------------------------------------------------------------------------------------------ | |
// (function(window) { | |
// function Animal(type, num_limbs) { | |
// this.type = type; | |
// this.num_limbs = num_limbs; | |
// } | |
// window.Animal = Animal; | |
// Animal.prototype.identify = function() { | |
// console.log("I am a " + this.type + " with " + this.num_limbs + " legs."); | |
// }; | |
// window.Zoo = Zoo; | |
// function Zoo() { | |
// } | |
// Zoo.prototype.init = function(animal) { | |
// this.animals = animals; | |
// }; | |
// Zoo.prototype.bipeds = function() { | |
// var bipeds = []; | |
// for(var i = 0; i < animals.length; ++i) { | |
// if (animals[i].num_limbs == 2) | |
// bipeds.push(animals[i]); | |
// } | |
// return bipeds; | |
// }; | |
// Zoo.prototype.quadrupeds = function() { | |
// var quadrupeds = []; | |
// for(var i = 0; i < animals.length; ++i) { | |
// if (animals[i].num_limbs == 4) | |
// quadrupeds.push(animals[i]); | |
// } | |
// return quadrupeds; | |
// }; | |
// }(window)); // creates a new scope | |
function Animal(type, num_limbs) { | |
this.type = type; | |
this.num_limbs = num_limbs; | |
} | |
// window.Animal = Animal; | |
Animal.prototype.identify = function() { | |
console.log("I am a " + this.type + " with " + this.num_limbs + " legs."); | |
}; | |
// window.Zoo = Zoo; | |
function Zoo() { | |
} | |
Zoo.prototype.init = function(animal) { | |
this.animals = animals; | |
}; | |
Zoo.prototype.bipeds = function() { | |
var bipeds = []; | |
for(var i = 0; i < animals.length; ++i) { | |
if (animals[i].num_limbs == 2) | |
bipeds.push(animals[i]); | |
} | |
return bipeds; | |
}; | |
Zoo.prototype.quadrupeds = function() { | |
var quadrupeds = []; | |
for(var i = 0; i < animals.length; ++i) { | |
if (animals[i].num_limbs == 4) | |
quadrupeds.push(animals[i]); | |
} | |
return quadrupeds; | |
}; | |
// creates a new scope | |
//------------------------------------------------------------------------------------------------------------------ | |
// 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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