Javascript Map On Empty Array

The map () method is used to get a modified version of the array or a reduced value using callback functions. If you want to get all the results, the simplest way would be promise.all: List of functions you can perform with the array.map () function are:

.length example one first, let's create a new array with no elements. With a traditional object in javascript, it is easy enough to check if it is empty using the object.keys method: This modification is done based on what is returned in the callback function.

Doing.map () on empty array will not produces an error, but will return an empty array.

New map(iterable) create a map from values in iterable object iterable. To check if the array is empty or not with.length, we can do this in in three ways. .map () can be used to iterate through objects in an array and, in a similar fashion to traditional arrays, modify the content of each individual object and return a new array. This method accepts five parameters as mentioned above and described below: