Javascript reduce method parameters The reduce method accepts two arguments: a reducer function for the array that is used as a callback, and an optional initialValue argument.

9 Must Know Array Iteration Methods Syntax JavaScript app - map, filter, reduce, some, every, find, findIndex, forEach. On materials of the FreeCodeCamp.

Array.prototype.map() is a method that iterates over an array and applies a function to each element, modifying it in some way. The result is then returned as a new array, leaving the original array ...