What does the Array prototype map method do? #javascriptinterviewquestions #javascriptinterview

The callback function passed to map is expected to return the value that will be placed in the new array. The new array will have the same length as the original array.

Here's a simple example:
Example:
const numbers = [1, 2, 3, 4, 5];

function callbackfunc {
return num * num;
}

In this example, the map function is used to create a new array (squaredNumbers) where each element is the square of the corresponding element in the numbers array.

It's important to note that map does not mutate the original array. If you need to modify the original array itself, you might want to use other array methods like forEach or for...of loops.

The map method is a powerful tool for transforming data in arrays, and it is commonly used in functional programming paradigms.

Above points are very useful for interview aspect.

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