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 ...

Learn how JavaScript’s built-in functions like map() and filter(), as well as compose() and chain(), support a more elegant handling of JavaScript arrays.

The map() method creates a new array populated with the results of the callback function for each element in the array. Similar to the other methods, the callback function will receive three ...

Make sure you are first filtering the data and then mapping over the array that returns. To do that, first use the filter function and then the map function. Verify that the filter function has a ...