'use strict';

function getValue() {
  return this.value;
}

const obj = { value: 42, getValue };
const fn = obj.getValue;

try {
  fn();
} catch (err) {
  console.log(err.constructor.name, typeof this);
}

console.log(
  typeof typeof 1,
  1 + typeof 1,
  2 ** 3 ** 2,
  1 + 2 + '3',
  1 < 2 < 3,
  3 > 2 > 1
);

function Foo(x) {
  this.x = x;
  return { x: x * 2 };
}

function Bar(x) {
  this.x = x;
  return 42;
}

const f = new Foo(5);
const b = new Bar(5);

console.log(f.x, b.x, f instanceof Foo, b instanceof Bar);

function* inner() {
  yield 1;
  yield 2;
  return 100;
}

function* outer() {
  const result = yield* inner();
  yield result;
  yield 3;
}

const it = outer();
console.log(it.next().value, it.next().value, it.next().value, it.next().value);

class Base {
  static count = 0;
  static increment() {
    this.count++;
    return this.count;
  }
}

class Derived extends Base {
  static count = 10;
}

console.log(Base.increment(), Derived.increment(), Base.count, Derived.count);