qetr1ck-op

function Rabbit() {}

Rabbit.prototype = {
  eats: true
};

var rabbit = new Rabbit();

console.log(rabbit.eats ); // (1) ?

qetr1ck-op

function Rabbit(name) {}
Rabbit.prototype = {
  eats: true
};

var rabbit = new Rabbit();

Rabbit.prototype.eats = false;

console.log( rabbit.eats );

qetr1ck-op

function Rabbit() {}
Rabbit.prototype = {
  eats: true
};

var rabbit = new Rabbit();

Rabbit.prototype = {}; // (*)

console.log( rabbit.eats ); // (2) ?

qetr1ck-op

function Rabbit(name) {}
Rabbit.prototype = {
  eats: true
};

var rabbit = new Rabbit();

Rabbit.prototype.eats = false; // (*)

console.log( rabbit.eats ); // (3) ?

qetr1ck-op

function Rabbit(name) {}
Rabbit.prototype = {
  eats: true
};

var rabbit = new Rabbit();

delete rabbit.eats; // (*)

console.log( rabbit.eats ); // (4) ?

qetr1ck-op

function Rabbit(name) {}
Rabbit.prototype = {
  eats: true
};

var rabbit = new Rabbit();

delete Rabbit.prototype.eats; // (*)

console.log( rabbit.eats ); // (5) ?

qetr1ck-op

function Rabbit(name) {
  this.name = name;
}
Rabbit.prototype.sayHi = function() {
  console.log( this.name );
}

var rabbit = new Rabbit('Rabbit');

rabbit.sayHi(); // (1) ?

qetr1ck-op

let obj = {};

console.log(obj.toString()) // [object Object] ???

qetr1ck-op

var arr = [1, 2, 3];

console.log(arr) // 1,2,3, result of arr.__proto__ -> Array.prototype.toString

qetr1ck-op

/*
1. create method in string prototype
2. it should return multiple repeated string by n times

consle.log( "foo".repeat(3) ); // 'foofoofoo'
*/

String.prototype.repeat = function(times) { //or use built-in ES6 repeat()
  return new Array(times + 1).join(this);
};