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
- Recreation
- Reference
- Regional
- Science
- Shopping
- Society
- Sports
- Бизнес
- Деньги
- Дом
- Досуг
- Здоровье
- Игры
- Искусство
- Источники информации
- Компьютеры
- Наука
- Новости и СМИ
- Общество
- Покупки
- Спорт
- Страны и регионы
- World
Больше
What Are Common Challenges Faced by Indie Hackers?
Indie hacking offers an exciting and rewarding journey for those seeking autonomy and the chance...
Business Trends and Ideas: Navigating the Future of Small Businesses in 2024
As we move into 2024, small businesses continue to evolve in response to shifting consumer...
Psychosis: Psychoactive Drugs
Various psychoactive substances (both legal and illegal) have been implicated in causing,...
Rules of conduct in case of emergencies in everyday life
1. RULES OF CONDUCT IN CASE OF FIRES IN EVERYDAY LIFE
Fire is always a disaster. However, not...
How Do I Attract and Retain Donors?
Attracting and retaining donors is one of the most important aspects of running a successful...