![]() These methods create a shallow copy of the original array which only copies the first level of data. ![]() The blog post explains that there are three common ways to copy an array in JavaScript: the slice method, spread operator and om method. But for basic data structures, it’s an easy way to create a deep copy. 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)) If you have an array of objects or arrays, you may need to create a deep copy to copy the nested data as well. 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. ![]() In JavaScript, you can copy an array using various methods. 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. Increment the index after performing the splice.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. ![]() For each item in the first array splice it into the copied array in the index given as argument. Loop through all of the items in the first array. This can be done by using the slice operation on the second array, and assign it to a variable. This will ensure that the original array is not mutated. Relevant LinksĬreate a copy of the second array inside of the function. ![]() That is, we cannot make any changes to the original arrays. We’ve also got to ensure that the original arrays are not mutated. We need to copy each element from the first array into the second array starting at the index n. ![]()
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