JavaScript has()

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
Больше
Business
Do You Have Any Questions for Us? A Key Moment to Show Interest and Engagement
At the end of most job interviews, candidates are asked, “Do you have any questions for...
От Dacey Rankins 2025-06-25 12:47:40 0 6Кб
Business
What’s the Most Important Lesson I’ve Learned?
Throughout life, we experience countless events, challenges, successes, and failures. Each of...
От Dacey Rankins 2025-09-08 08:09:48 0 3Кб
Ethnic and Regional
Jewelry nationality
The word ethnica itself comes from the Greek word ethnos, which means people. In the fashion...
От FWhoop Xelqua 2022-12-15 17:39:03 0 24Кб
Спорт
Атлас. Atlas. (2021)
Аллегра живет в швейцарском Лугано и любит проводить время со своим парнем Бенни, лучшей подругой...
От Nikolai Pokryshkin 2022-09-03 19:52:30 0 39Кб
Business
What Motivates and Retains Employees Here?
Understanding what drives and keeps employees engaged in a company gives insight into its...
От Dacey Rankins 2025-08-09 18:31:13 0 7Кб

BigMoney.VIP Powered by Hosting Pokrov