Matt Doyle | Elated Communications
Web and WordPress Development
Learn how to create and use arrays in JavaScript.
In previous tutorials we’ve taken a look at JavaScript array basics, manipulating arrays, and sorting arrays. So far, all the arrays we’ve dealt with have been “flat” arrays; each array element contains a single value, such as a number, string, or object.
However, like most programming languages, JavaScript lets you create arrays inside arrays, known as nested arrays. In a nested array, the elements of one array are themselves arrays. For example:
Previously we looked at the basics of JavaScript arrays, and showed how to manipulate the elements within them. In this tutorial, we take a look at how to sort array elements. You learn how to reverse the order of an array; how to sort an array alphabetically; and how to sort an array’s elements into any order you like.
My first tutorial on JavaScript arrays covered the basics: creating arrays, accessing the contents of arrays, array lengths, and looping through arrays.
In this tutorial, you explore arrays in more depth, and learn how to use various methods of the Array object to manipulate arrays.
Like most languages, JavaScript lets you create arrays to store bunches of values in. An array is simply a sequence, or list, of values. A value in a JavaScript array can be anything from a number or string, through to a function or an object; JavaScript arrays can store pretty much any type of data. A single value in a JavaScript array is called an element.
With JavaScript arrays, you can:
JavaScript stores arrays as Array objects, so most of the things you can do with arrays revolve around the properties and methods of the Array class.
In this introductory article, you look at creating arrays, accessing the contents of arrays, the concept of array lengths, and looping through arrays.
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