'use strict';

function logThis() {

this.desc = 'logger';

console.log(this); // { desc: 'logger' }

}

new logThis();

// '''''''''''''''''''''''''''''

var Storm = function () {};

Storm.prototype.precip = 'rain';

var WinterStorm = function () {};

WinterStorm.prototype = new Storm();

WinterStorm.prototype.precip = 'snow';

var bob = new WinterStorm();

console.log(bob.precip); // snow

// lllllllllllllllllllllllllllllll

const obj = {

a: 1,

b: 2,

c: 3,

};

const obj2 = {

...obj,

a: 0,

};

console.log(obj2.a, obj2.b); // 0 2

// llllllllllllllllllllllllllll

console.log(sum(10, 20)); // 30 ReferenceError

// console.log(diff(10, 20));

function sum(x, y) {

return x + y;

}

let diff = function(x, y) {

return x - y;

}

// lllllllllllllllllllllll

function sayHello() {

console.log("hello");

}

var func = sayHello;

func.answer = 42;

console.log(sayHello.answer); // 42

var a = ['dog', 'cat', 'hen'];

a[100] = 'fox';

console.log(a.length);

var a;

var b = (a=3) ? true: false

let arr = [];

console.log(arr);

console.log([] ==[]);

class X {

get Y() {return 42;}

}

var x = new X();

console.log(x.Y);

var v = 1;

var f1 = function () {

console.log(v);

}

var f2 = function () {

var v = 2;

f1();

}

f2();