Array Map in Javascript

Sometimes you may need to take an array and apply a function to its elements so that you get a new array with modified elements.

Instead of manually iterating over the array using a loop, you can simply use the built-in method.

The method allows you to iterate over an array and modify its elements using a callback function. The callback function is executed on each of the array's elements and returns a transformed (or mapped) version of the element.

Array Reduce in Javascript


This JavaScript method is used to reduce the array to a single value. reduce() and executes a provided function for each value of the array (from left-to-right), and the return value of the function is stored in an accumulator parameter.