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JavaScript
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CHALLENGE
function Animal() {}
function Dog() {}
Dog.prototype = Object.create(Animal.prototype);
const rover = new Dog();
console.log(rover.constructor === Animal);
console.log(rover.constructor === Dog);
console.log(Dog.prototype.isPrototypeOf(rover));
console.log(Animal.prototype.isPrototypeOf(rover));
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What is the output?
Anonymous Quiz
29%
true, false, true, true
27%
false, false, true, true
24%
false, true, false, true
20%
true, true, true, false
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CHALLENGE
function Shape() {}
function Circle(radius) {
this.radius = radius;
}
Circle.prototype = Object.create(Shape.prototype);
Circle.prototype.constructor = Circle;
const shape = new Shape();
const circle = new Circle(5);
console.log(circle instanceof Circle);
console.log(circle instanceof Shape);
console.log(shape instanceof Circle);
console.log(shape instanceof Shape);
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What is the output?
Anonymous Quiz
42%
true, true, false, true
21%
false, false, true, true
25%
true, false, true, false
12%
true, true, true, true
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ArmenVardanyan
Author of "Modern Angular"
Google DevExpert for Angular
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CHALLENGE
function Animal() {}
function Dog() {}
Dog.prototype = Object.create(Animal.prototype);
const rover = new Dog();
console.log(rover.hasOwnProperty('constructor'));
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Less shell-oriented than zx, execa focuses on making executing external commands secure, cross-platform, and easy to debug. v9 lets you make commands iterable so you can process their output on the fly, map/filter both input and output, pipe multiple commands, and more. GitHub repo.
EHMICKEY, SORHUS, ET AL.
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CHALLENGE
function Shape() {}
function Circle(radius) {}
Circle.prototype = Object.create(Shape.prototype);
const shape = new Shape();
console.log(shape instanceof Circle);
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To continue delivering more exciting stories, we're kindly asking telegram premium users to help us take things to the next level.
https://t.iss.one/javascript?boost
https://t.iss.one/javascript?boost
Telegram
JavaScript
Boost this channel to help it unlock additional features.
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CHALLENGE
function Animal() {}
const dog = new Animal();
console.log(dog.constructor === Animal);
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📄✌️ How to Document Your JavaScript Package
You’ve written some useful code, you want to distribute it.. what next? Useful docs! The Deno team demonstrates the value of JSDoc and writing documentation alongside your usual source code.
THE DENO TEAM
You’ve written some useful code, you want to distribute it.. what next? Useful docs! The Deno team demonstrates the value of JSDoc and writing documentation alongside your usual source code.
THE DENO TEAM
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CHALLENGE
var foo = {};
var bar = Object.create(foo);
foo.a = 1;
console.log(bar.a);
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