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Wade Coplen #747

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Wade-Coplen Oct 9, 2019
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Wade-Coplen Oct 9, 2019
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64 changes: 64 additions & 0 deletions assignments/Constructor Functions.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,64 @@
Interitance in Constructors
Step One - create the Object based on key: value pairs needed for the project.
Example-
const Fred = ({
age: 45,
name: "Fred",
location: "Bedrock",
phrase: "Yabba dabba do"
});

Step Two - create the constructor called Parent.
Example -
function Parent(attributes) {
this.newAge = attributes.age;
this.newName = attributes.name;
this.newLocation = attributes.location;
this.newPhrase= attributes.phrase;
console.log(this);
}
Step Three - if we want to add a a key: value to the Object or Parent, we have to add it to the _proto_ using:
Example -
Parent.prototype.speak = function() {
return `${this.newName} says ${this.newPhrase}`;
}

Step Four - Use explicit binding to connect or transfer this:
function Parent(attributes) {
this.newAge = attributes.age;
this.newName = attributes.name;
this.newLocation = attributes.location;
this.newPhrase= attributes.phrase;
console.log(this);
}

...to this. Using the Parent.call method, allows us bind these together to create DRY coding, as to prevent us from
needing to retype the Object again.

function Child(childAttributes) {

console.log(childAttributes);
this.newToy = childAttributes.toy;
};






-----------------
const mage = new Humanoid({
createdAt: new Date(),
dimensions: {
length: 2,
width: 1,
height: 1,
},
healthPoints: 5,
name: 'Bruce',
team: 'Mage Guild',
weapons: [
'Staff of Shamalama',
],
language: 'Common Tongue',
});
4 changes: 2 additions & 2 deletions assignments/index.html
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Expand Up @@ -11,7 +11,7 @@
<script src="prototypes.js"></script>
</head>

<body>

<h1>JS III - Check your work in the console!</h1>
</body>
</html>
</html>
40 changes: 33 additions & 7 deletions assignments/prototypes.js
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Expand Up @@ -14,14 +14,33 @@
* name
* dimensions (These represent the character's size in the video game)
* destroy() // prototype method that returns: `${this.name} was removed from the game.`
*/
*/
function GameObject(objects) {
this.createdAt = objects.createdAt;
this.name = objects.name;
this.dimensions = objects.dimensions;
}
GameObject.prototype.destroy = function() {
return `${this.name} was removed from the game.`;
};


/*
=== CharacterStats ===
* healthPoints
* takeDamage() // prototype method -> returns the string '<object name> took damage.'
* should inherit destroy() from GameObject's prototype
*/
function CharacterStats(stats) {
GameObject.call(this, stats);
this.healthPoints = stats.healthPoints;
};
CharacterStats.prototype = Object.create(GameObject.prototype);
CharacterStats.prototype.takeDamage = function() {
return `${this.name} took damage.`;
};



/*
=== Humanoid (Having an appearance or character resembling that of a human.) ===
Expand All @@ -32,6 +51,16 @@
* should inherit destroy() from GameObject through CharacterStats
* should inherit takeDamage() from CharacterStats
*/
function Humanoid(attributes) {
CharacterStats.call(this, attributes);
this.team = attributes.team;
this.weapons = attributes.weapons;
this.language = attributes.language;
}
Humanoid.prototype = Object.create(CharacterStats.prototype);
Humanoid.prototype.greet = function() {
return `${this.name} offers a greeting in ${this.language}`;
};

/*
* Inheritance chain: GameObject -> CharacterStats -> Humanoid
Expand All @@ -41,7 +70,7 @@

// Test you work by un-commenting these 3 objects and the list of console logs below:

/*

const mage = new Humanoid({
createdAt: new Date(),
dimensions: {
Expand All @@ -68,10 +97,7 @@
healthPoints: 15,
name: 'Sir Mustachio',
team: 'The Round Table',
weapons: [
'Giant Sword',
'Shield',
],
weapons: ['Giant Sword', 'Shield',],
language: 'Common Tongue',
});

Expand Down Expand Up @@ -102,7 +128,7 @@
console.log(archer.greet()); // Lilith offers a greeting in Elvish.
console.log(mage.takeDamage()); // Bruce took damage.
console.log(swordsman.destroy()); // Sir Mustachio was removed from the game.
*/


// Stretch task:
// * Create Villain and Hero constructor functions that inherit from the Humanoid constructor function.
Expand Down