const obj = {
  count: 0,
  increment() {
    this.count++;
  },
  getCount() {
    return (() => this.count)();
  }
};

obj.increment();
obj.increment();

console.log(obj.getCount());

const obj = {
  data: [1, 2, 3],
  getData() {
    return this.data.map(x => x * 2);
  }
};

const newData = obj.getData.bind({ data: [4, 5, 6] })();
console.log(newData);

const obj = {
  value: 1,
  increment() {
    this.value++;
  }
};

const increment = obj.increment;
increment();

console.log(obj.value);

const obj = {
  num: 10,
  getValue() {
    return this.num;
  },
  getUpdatedValue() {
    return (() => this.num + 10)();
  }
};

console.log(obj.getValue());
console.log(obj.getUpdatedValue());

let num = 5;

function change() {
  let num = 10;
  return function() {
    return num;
  };
}

const getValue = change();
num = 20;

console.log(getValue());