![]() Method 1: Setting the length property to 0 Now that we know what an array is, let's look at different ways to clear an array in JavaScript. In JavaScript, arrays are very versatile and can store different types of data, like numbers, strings, or even other arrays. Think of it as a collection of items, like a shopping list where you can add, remove, or modify items. An array is a data structure that allows you to store multiple values in a single variable. We'll be focusing on simple, beginner-friendly explanations and examples, so if you are just starting your programming journey, you're in the right place!īefore we dive into the main topic, let's quickly go over what an array is. ![]() In this blog post, we'll explore different ways to clear an array in JavaScript. ![]() One such common task is clearing an array. As you venture into the world of programming, you'll often come across situations where you need to manipulate data in various ways. Howmany - The number of items to be removed. Index - Integer that specifies at what position to add/remove items, Use negative values to specify the position from the end of the array.< After the first and the second argument, you can add any number of arguments that will indicate the elements to be inserted.ĭocument.writeln(x + '') // outputs: 1,2,3,4,101,102,103,7,8,9,10Īt this point we are formally ready to understand the definition of the splice method as.Īrray.splice(index,howmany,item1.,itemX) What if you wish to insert some elememts in the array after splicing it, from the position of splice. If you specify two arguments to the splice method, then the second argument specifies the number of elements to remove.ĭocument.writeln(x + '') // outputs: 1,2,3,4,7,8,9,10 If you specify one argument to the splice method, it cuts the array after a number of element specified by that argument.ĭocument.writeln(x + '') // outputs: 1,2,3,4ĭocument.writeln(y) // outputs 5,6,7,8,9,10 We will rarely use splice method withut any argument. This does not really do anything meaningful. It will leave the original array intact and will return an empty array.ĭocument.writeln(x) // outputs: 1,2,3,4,5,6,7,8,9,10ĭocument.writeln(yy) // outputs undefined If you specify no argument to the splice method, it does not really do anything. So at the end of the operation, you have two arrays - the orginal array with a part of it removed and a returned array that consists of the removed items. Additionally, it returns the removed elements in another array. The splice method is a versatile way to reduce contiguous area of the Array.
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