![]() 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. Join over 14k others.An array in JavaScript is an ordered list of elements with a specified index (the key to them). Hate the complexity of modern front‑end web development? I send out a short email each weekday on how to build a simpler, more resilient web. □ Flash Sale! This week only, get 50% off every JavaScript course and ebook. You can play with all of the code from today’s article on CodePen.Īnd if you’d like to hear Steve Griffith’s soothing voice explain this, you can watch his video on these methods here. Super nerdy, and may not work for you, but that’s how I keep them sorted in my head. You can cut the array up add, remove or replace things and then tape it all back together. ![]() If an array were a film reel, the splice() method behaves like physically splicing that reel would. With the slice() method, you’re taking a slice of an array. I use analog references to help me remember the difference between these two. splice ( 2, 1, 'Hermione' ) How to remember: slicing and splicing splice ( 2, 0, 'Dumbledore' ) // This replaces "Dumbledore" with "Hermione" This adds "Dumbledore" at index 2, and removes 0 items at that index ![]()
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