How does Javascript implement a mapping array without map ()

This article is about how Javascript implements mapping arrays without map (). The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Mapping array without map ()

Let's first introduce the map method. The map () method returns a new array in which the elements are the values of the original array elements after calling the function, and it processes the elements in turn in the order of the original array elements. Note: map () does not change the original array, nor does it detect empty arrays.

Let's implement an array mapping without map:

/ / array.map (function (currentValue,index,arr), thisValue) var plants = [{name: "Saturn"}, {name: "Uranus"}, {name: "Mercury"}, {name: "Venus"},] var plantsName = Array.from (plants, ({name}) = > name); console.log (plantsName); / / [Saturn', 'Uranus',' Mercury', 'Venus'] Thank you for reading! This is the end of the article on "how to implement the mapping array without map () in Javascript". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it out for more people to see!