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To make a deep copy, JSON can be used but it has some limitations such as not working with functions or objects containing circular references. A shallow copy duplicates the contents of an object into. These methods create a shallow copy of the original array which only copies the first level of data. slice() array method returns a shallow copy of all or part of an array without modifying the original.

The blog post explains that there are three common ways to copy an array in JavaScript: the slice method, spread operator and om method. After splitting the string into multiple substrings, the split() method puts them in an array and returns it. The splitter can be a single character, another string, or a regular expression. But for basic data structures, it’s an easy way to create a deep copy. The split() method splits (divides) a string into two or more substrings depending on a splitter (or divider). This approach has some limitations: it doesn’t work with functions or objects containing circular references. Here’s an example using JSON:Ĭonst originalArray = Ĭonst copiedArray = JSON.parse(JSON.stringify(originalArray)) Syntax The splice () method is represented by the following syntax: array. The splice () method also modifies the original array. It returns the removed elements from an array. If you have an array of objects or arrays, you may need to create a deep copy to copy the nested data as well. The JavaScript array splice () method is used to add/remove the elements to/from the existing array. Here are three common ways:Ĭonst copiedArray = originalArray.slice() Ĭonst copiedArray = om(originalArray) Īll these methods create a shallow copy of the original array, which means they can only copy the first level of the original array. 2 It will, however, always work to clear the original array, regardless of references. Splicing won't be as fast as the other two methods because it will return the removed elements as an array. In JavaScript, you can copy an array using various methods. To set the 'a' array to zero, use the following code: a.length 0 3 Splice the array. We will also look at how to create a deep copy using JSON when dealing with nested data structures such as objects or arrays containing circular references. Using slice, create newCar from m圜ar.Are you looking for a way to copy an array in JavaScript? In this blog post, we’ll discuss three common methods of copying arrays: the slice method, spread operator and om method.