JavaScript has()
Posted 2023-05-16 11:21:29
0
11K
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.
Search
Categories
- Arts
- Business
- Computers
- Games
- Health
- Home
- Kids and Teens
- Money
- 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
Read More
Монти Пайтон и священный Грааль. Monty Python and the Holy Grail. (1975)
Король Артур и рыцари Круглого стола отправляются в невероятное путешествие на поиски Святого...
Python Autocomplete Plugin
Making a functional program using Python can be stressful since you would need to go back and...
When Is the Right Time to Expand Internationally?
For many businesses, expanding internationally represents the ultimate growth milestone. Global...
Understanding the High Cost of American Healthcare
Introduction
The United States is known for many things, but one of the most pressing issues...
Serving in Volleyball
Where does volleyball start? With a good mood, with a good game, form or serve? Everyone chooses...