This content originally appeared on DEV Community and was authored by zain ul abdin
In a vast variety of useful tools and features that JavaScript offers, powerful structures such as Sets and Maps often get overlooked.
What are they?
A Set is like a special list that is perfect when you need to ensure all your items are different.
On the other hand, a Map works a bit like a dictionary. Instead of words, you have keys, and instead of meanings, you have values.
A Set can be used to store names of people at a party without repetition, while a Map allows you to store people’s names and their favorite colors in a key-value pair.
Both Sets and Maps share some methods that make them easy to work with, such as set() to set a new value, get() to retrieve that value, and size to know the size of the structure.
However, when it comes to checking if something is a Set or a Map, it gets a little tricky, as using typeof returns both as objects. Instead, using instanceof will correctly tell you if your data is a Set or a Map.
Sets and Maps are powerful tools in JavaScript, allowing you to store and organize data in smart and efficient ways depending on your needs, and should be used more often.
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This content originally appeared on DEV Community and was authored by zain ul abdin
zain ul abdin | Sciencx (2024-08-22T02:12:40+00:00) What Are JavaScript Sets and Maps?. Retrieved from https://www.scien.cx/2024/08/22/what-are-javascript-sets-and-maps/
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