You want to filter this array to only keep the user objects for users that were born before 1990. This is a perfect use-case for an XPath query. We can start by finding all keys the object that have a ...

Arrays are wonderful and a very particular type in JavaScript. There are many useful built-in properties and methods that will help you resolve any task which involves this kind of type. Today, we ...

JSON arrays are an ordered list of values. Arrays are used to store objects, strings, number notation and Boolean notation. An array can be made up of multiple data types. Arrays in JSON are ...

Map, filter, reduce and find are array methods that are coming from a programming paradigm named functional programming.. To sum it up: Array.prototype.map() takes an array, does something on its ...