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The JavaScript array is a data type that consists of a list of elements. There are many useful built-in methods to work with arrays in JavaScript. Methods that modify the original array are known as mutator methods, and methods that return a new value or representation are known as accessor methods. In this tutorial, we will focus on accessor methods.
In order to get the most out of this tutorial, you should have some familiarity with creating, indexing, modifying, and looping through arrays, which you can review in the tutorial Understanding Arrays in JavaScript.
This tutorial will go over methods that will concatenate arrays, convert arrays to strings, copy portions of an array to a new array, and find the indices of arrays.
Note: Array methods are properly written out as Array.prototype.method(), as Array.prototype refers to the Array object itself. For simplicity, we will simply list the name as method().
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An array in JavaScript is a type of global object used to store data. Arrays can store multiple values in a single variable, which can condense and organize our code. JavaScript provides many built-in methods to work with arrays, including mutator, accessor, and iteration methods.
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Thatβs a great article. Inspired me to write a 3 part series over Arrays in JS:
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