Here is the list of the top 5 data structures essential for JavaScript programming.

· Arrays  · Objects  · Linked lists  · Hash tables  · Trees


Arrays are used to store a list of ordered items, such as numbers, strings, or objects. One can be used for a variety of tasks, such as storing data, manipulating data, and performing calculations.


Objects are used to store key-value pairs, where the key is a unique identifier and the value can be any type of data, such as a number, string, object, or array. They are useful for storing and organizing data in a complex way.

Linked lists

Linked lists are data structures that consist of a sequence of nodes, each node containing a value and a pointer to the next node in the sequence.

Hash tables

Hash tables store key-value pairs, where the key is used to hash the value into a unique index in the table. They are very efficient for searching and retrieving data and are often used for databases and caches.


Trees are used to store hierarchical data, such as a file system or a family tree. They are used for searching and retrieving data, and they are often used for algorithms such as sorting and searching.

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