How can I create a copy of an array in JavaScript without modifying the original?
Richard W

To create a copy of an array in JavaScript without modifying the original array, you can use various techniques. Here's a step-by-step guide on how to achieve this: 1. Define the array you want to copy:

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   const originalArray = [1, 2, 3, 4, 5];

Replace[1, 2, 3, 4, 5] with the actual array you want to copy. 2. Use the spread operator: The spread operator (...) can be used to create a shallow copy of an array.

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   const copiedArray = [...originalArray];

The spread operator expands the elements of theoriginalArray and creates a new array with those elements. This technique works for both primitive values and object references. 3. Use theArray.from() method: TheArray.from() method can be used to create a new array from an existing array.

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   const copiedArray = Array.from(originalArray);

TheArray.from() method creates a new array by iterating over the elements of theoriginalArray and copying them to the new array. 4. Use theslice() method: Theslice() method can create a copy of an array by specifying the start and end indices.

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   const copiedArray = originalArray.slice();

When called without arguments, theslice() method returns a copy of the entire array. 5. Verify the copied array: You can verify that the copied array is indeed a separate entity from the original array by making changes to one of them and observing that it doesn't affect the other.

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   copiedArray.push(6);
   console.log(originalArray); // Output: [1, 2, 3, 4, 5]
   console.log(copiedArray);   // Output: [1, 2, 3, 4, 5, 6]

In this example, pushing a new value to thecopiedArray does not modify theoriginalArray. By following these steps, you can create a copy of an array in JavaScript without modifying the original array. Choose the technique that suits your preference or the requirements of your project. Ensure that you select the correct method based on the specific use case, such as preserving object references or creating a shallow copy.

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