JavaScript has()

0
11KB

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.

Pesquisar
Categorias
Leia mais
Marketing and Advertising
Which Businesses or Industries Is Guerrilla Marketing Best Suited For?
Understanding where guerrilla marketing works best and where it may fall short. Introduction:...
Por Dacey Rankins 2025-10-07 17:39:24 0 2KB
Ужасы
Психо. Psycho. (1960)
Мэрион Крэйн недовольна романом с разведенным мужчиной, который уделяет ей внимание только...
Por Nikolai Pokryshkin 2022-11-24 20:52:18 0 29KB
Food and Related Products
Food and Related Products: The Heart of Global Industry and Culture
Food is essential to life, but it is also much more than a biological necessity. The production,...
Por Dacey Rankins 2024-11-15 15:12:33 0 14KB
Publishing and Printing
Printing Designer
A printing designer develops and implements in design layouts concepts for the design of printed...
Por Michael Pokrovski 2024-03-18 20:59:30 0 24KB
Programming
Mojo Language
Mojo is a Python type language that uses C for the performance. Python is normally slow when it...
Por Jesse Thomas 2023-05-05 20:31:29 0 12KB

BigMoney.VIP Powered by Hosting Pokrov