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
What Are Effective B2C Marketing Strategies?
Business-to-Consumer (B2C) marketing is about capturing the attention of individual customers,...
Por Dacey Rankins 2025-09-23 16:26:56 0 4KB
Business
What Resources (Time, Money, People) Are Available? Assessing Constraints and Allocations Early On
Successful project execution starts with a clear understanding of the resources...
Por Dacey Rankins 2025-07-11 19:45:19 0 5KB
Business
How Do I Make Meetings More Engaging?
Moving Beyond Monologues to Meaningful Interaction Let’s face it—many meetings are...
Por Dacey Rankins 2025-07-31 16:55:03 0 7KB
Science Fiction and Fantasy
The Dark Knight. (2008)
When the menace known as the Joker wreaks havoc and chaos on the people of Gotham, Batman must...
Por Leonard Pokrovski 2022-11-01 19:46:51 0 29KB
Earth Sciences
Unveiling Earth's Secrets: Exploring the Wonders of Earth Sciences
Unveiling Earth's Secrets: Exploring the Wonders of Earth Sciences Earth, our home planet, is a...
Por Leonard Pokrovski 2024-05-22 20:43:46 0 20KB

BigMoney.VIP Powered by Hosting Pokrov