JavaScriptda ko‘p o‘lchamli ob'ektlarga elementlar qo‘shish

Quyida talabalar bilan bog'liq quyidagi ob'ekt berilgan bo'lsin:

javascriptlet students = {
  'group1': ['student11', 'student12', 'student13'],
  'group2': ['student21', 'student22', 'student23'],
  'group3': ['student31', 'student32'],
};

Keling, birinchi guruhga yana bir talaba qo'shamiz:

javascriptstudents.group1.push('student14');

Keling, endi to'rtinchi guruhni yaratamiz va unga talaba qo'shamiz. Buning uchun avval yangi guruhni massiv sifatida e'lon qilish kerak:

javascriptstudents.group4 = [];

Shundan keyingina unga talabalarni qo'shish mumkin:

javascriptstudents.group4.push('student41');

Задание 1

Ma'lum sanalar uchun ishlar ro'yxatini saqlash uchun quyidagi tuzilmani o'zingizga nusxalang:

javascriptlet affairs = {
  '2019-12-28': ['data11', 'data12', 'data13'],
  '2019-12-29': ['data21', 'data22', 'data23'],
  '2019-12-30': ['data31', 'data32', 'data33'],
}

Задание 2

'2019-12-29' sanasiga yana bir ish qo'shing.

Задание 3

'2019-12-31' sanasiga yana ikkita ish qo'shing.

Задание 4

Talabalar ro'yxatini saqlash uchun quyidagi tuzilmani o'zingizga nusxalang:

javascriptlet students = {
  'group1': {
    'subgroup11': ['student111', 'student112', 'student113'],
    'subgroup12': ['student121', 'student122', 'student123'],
  },
  'group2': {
    'subgroup21': ['student211', 'student212', 'student213'],
    'subgroup22': ['student221', 'student222', 'student223'],
  },
  'group3': {
    'subgroup31': ['student311', 'student312', 'student313'],
    'subgroup32': ['student321', 'student322', 'student323'],
  },
};

Задание 5

'subgroup11' kichik guruhiga yangi talaba qo'shing.

Задание 6

Birinchi guruhga yana bir kichik guruh qo'shing.

Задание 7

To'rtinchi guruhni yarating, unda kichik guruh yarating va unga ikkita yangi talaba qo'shing.