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Definition and Usage

The map() function applies a given callback function to each element of an array and returns a new array.

The original array remains unchanged during this process.

The callback function passed to the map() function transforms each element and returns a new array with these transformed values.

This process is called "mapping", which is why the function is named map() — it maps original values to new ones.

Mapping refers to the process of associating one value with another.

This concept is used in various fields such as mathematics, computer science, and geographic information systems (GIS).

Why Use the map() Function?

The map() function is used to transform each element in an existing array according to a specific rule or logic defined in the callback function, and then creates a new array composed of the transformed elements.

Creating a new array of squared values from a number array

Converting all strings in an array…