Map in JS

JavaScript Maps are versatile data structures that store key-value pairs, maintaining the order of insertion and supporting various data types as keys. Unlike objects, Maps allow flexible key types such as objects and functions, ensuring unique keys for efficient data retrieval. With operations like set(), get(), and delete(), Maps offer O(1) time complexity for frequent insertions and deletions, making them a robust alternative for managing dynamic key-value data efficiently.

Maps provide features like secure key management, unique keys, and easy retrieval of collection size with the size property. They also allow for flexible key types and maintain insertion order, which enhances performance compared to traditional objects. JavaScript Maps are widely used in scenarios like counting frequencies, maintaining dictionaries, and solving problems like finding distinct elements, subarrays with specific sums, or frequent element occurrences in arrays.

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