prototype inheritance javascript

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showing results for - "prototype inheritance javascript"
Philipp
04 Sep 2019
1function Animal (name, energy) {
2  this.name = name
3  this.energy = energy
4}
5
6Animal.prototype.eat = function (amount) {
7  console.log(`${this.name} is eating.`)
8  this.energy += amount
9}
10
11Animal.prototype.sleep = function (length) {
12  console.log(`${this.name} is sleeping.`)
13  this.energy += length
14}
15
16Animal.prototype.play = function (length) {
17  console.log(`${this.name} is playing.`)
18  this.energy -= length
19}
20
21function Dog (name, energy, breed) {
22  Animal.call(this, name, energy)
23
24  this.breed = breed
25}
26
27Dog.prototype = Object.create(Animal.prototype)
28
29Dog.prototype.bark = function () {
30  console.log('Woof Woof!')
31  this.energy -= .1
32}
33
34const charlie = new Dog('Charlie', 10, 'Goldendoodle')
35console.log(charlie.constructor)
Juan Esteban
26 Mar 2019
1function Person(first, last, age, gender, interests) {
2  this.name = {
3    first,
4    last
5  };
6  this.age = age;
7  this.gender = gender;
8  this.interests = interests;
9};
10
11function Teacher(first, last, age, gender, interests, subject) {
12  Person.call(this, first, last, age, gender, interests);
13
14  this.subject = subject;
15}
Hannah
15 Mar 2019
1function inherit(c, p) {
2        Object.defineProperty(c, 'prototype', {
3            value: Object.assign(c.prototype, p.prototype),
4            writable: true,
5            enumerable: false
6        });
7
8        Object.defineProperty(c.prototype, 'constructor', {
9            value: c,
10            writable: true,
11            enumerable: false
12        });
13    }
14// Or if you want multiple inheritance
15
16function _inherit(c, ...p) {
17        p.forEach(item => {
18            Object.defineProperty(c, 'prototype', {
19                value: Object.assign(c.prototype, item.prototype),
20                writable: true,
21                enumerable: false
22            });
23        })
24
25        Object.defineProperty(c.prototype, 'constructor', {
26            value: c,
27            writable: true,
28            enumerable: false
29        });
30    }
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