qosainbox.blogg.se - Slice array javascript

The sort() function transforms the initial array The regular sorting takes place in an alphabetical sequence. It sorts the elements in ascending or descending order. Sort() – this is probably the most frequently-used method as well.Reverse() – it reverses the positions of the pieces, the ultimate element becomes the first in a line and vice versa.This approach does not change the initial array Join() – it returns a new string where all the pieces of the array are joined.Let’s pay closer attention to the most popular of them: There is a variety of built-in tools, which are necessary for working with JavaScript arrays, and which also greatly simplify writing code, making it cleaner. Below, we will briefly consider some of the most popular methods, and then learn in detail the peculiarities of the JavaScript slice method. Each method has a unique function that makes it possible to modify arrays.

They make it possible to manage, sort, transform, and perform the necessary data manipulations when required. So, the power of JS arrays lies in their methods.

It is used to hold multiple values in one variable.Ī pair of square brackets denotes an array, the pieces are divided by commas, while the location of an element is indicated by an index.

We do not need to specify the size of the array in advance – it changes (increases/decreases) automatically

It stores values of mixed types, which can contain numbers, strings, and units from other arrays.

Unlike other languages, where an array is a reference to multiple variables, in JavaScript it is the only variable that can store multiple pieces: To work with an array, developers usually apply the built-in functions provided like JavaScript slice. When we want to store a list of certain parts and then access them with a single variable, that’s when we use an array.

An array in JavaScript is an ordered list of elements with a specified index (the key to them).