JavaScript has()

0
11كيلو بايت

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.

البحث
الأقسام
إقرأ المزيد
مال
How to Make Money
How to Make Money Making money is a goal shared by many, but the best strategies often depend on...
بواسطة Leonard Pokrovski 2025-09-21 21:07:13 0 6كيلو بايت
Business
How Do I Start Vlogging?
Introduction Vlogging — or video blogging — has evolved from a casual hobby into a...
بواسطة Dacey Rankins 2025-11-11 18:14:39 0 5كيلو بايت
Business
What Does a Product Manager Do?
A product manager (PM) wears many hats, acting as a strategist, communicator, and decision-maker...
بواسطة Dacey Rankins 2025-08-15 20:31:55 0 5كيلو بايت
Game Studies
Game Studies: The Intersection of Play, Culture, and Technology
Game studies is an interdisciplinary field that examines games as a cultural and social...
بواسطة Dacey Rankins 2024-10-21 16:59:53 0 16كيلو بايت
Soccer
Soccer: The Beautiful Game Unites the World
Soccer: The Beautiful Game Unites the World Soccer, known as football in most parts of the...
بواسطة Leonard Pokrovski 2024-07-10 09:38:54 0 22كيلو بايت

BigMoney.VIP Powered by Hosting Pokrov