JavaScript has()
Сообщение 2023-05-16 11:21:29
0
11Кб
The has() function of the map object accepts a key in string format and returns a boolean value of true if the specified key exists. Otherwise, the function returns false.
Map is a data structure in JavaScript that allows the storage of [key, value] pairs where any value can be used as either a key or value.
Syntax
mapObject.has(key)
The has() function takes a key in the string format. It returns a boolean value that indicates the presence of that key in the Map object.
Поиск
Категории
- Arts
- Business
- Computers
- Игры
- Health
- Главная
- Kids and Teens
- Деньги
- News
- Personal Development
- Recreation
- Regional
- Reference
- Science
- Shopping
- Society
- Sports
- Бизнес
- Деньги
- Дом
- Досуг
- Здоровье
- Игры
- Искусство
- Источники информации
- Компьютеры
- Личное развитие
- Наука
- Новости и СМИ
- Общество
- Покупки
- Спорт
- Страны и регионы
- World
Больше
The Forever Purge (2021)
All the rules are broken as a sect of lawless marauders decides that the annual Purge does not...
Can I Pay Off My Loan Early? What Happens If I Repay Ahead of Schedule?
Can I Pay Off My Loan Early? What Happens If I Repay Ahead of Schedule?
Managing a loan...
Interpreting the aggregate demand/aggregate supply model
Key points
The aggregate demand/aggregate supply model is a model that...
Inspirational Checklist: 25 Things to Try If You Want to Change Your Life
The list was compiled by psychologists, coaches and personal growth...
How Do I Write Good Ad Copy?
Advertising succeeds or fails largely because of words. Even in highly visual campaigns, ad copy...