JavaScript has()

0
10K

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
Read More
Business
Internal Teams Not Knowing What We Do: The Visibility Challenge for Product Marketing
One of the biggest frustrations Product Marketing Managers (PMMs) face isn’t just juggling...
By Dacey Rankins 2025-09-15 18:58:36 0 2K
Business
What Ethical and Bias Considerations Arise in Its Application?
While Management Science offers powerful tools for decision-making, ethical and bias issues can...
By Dacey Rankins 2025-08-15 20:28:13 0 3K
Business
CONSULTING AS ONE OF THE MOST EFFECTIVE WAYS TO MANAGE A BUSINESS
Business consulting involves the cooperation of companies with professionals in a certain field,...
By Dacey Rankins 2024-07-23 08:40:35 0 13K
Business
Why does a start-up business need marketing?
Why does a start-up business need marketing? It seems that the English-language term...
By Leonard Pokrovski 2024-08-30 00:02:17 0 19K
Business
B2B Marketing
B2B Marketing   In B2B (business to business), one company sells a product or...
By Leonard Pokrovski 2024-08-30 20:22:18 0 30K

BigMoney.VIP Powered by Hosting Pokrov