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How to resize an array in Kotlin

How to resize an array in Kotlin.

Here's a step-by-step tutorial on how to resize an array in Kotlin.

Step 1: Declare an array​

First, you need to declare an array in Kotlin. You can do this by specifying the type of elements the array will hold, followed by the name of the array and the initial size. For example, to declare an array of integers with an initial size of 5, you can use the following code:

val array = IntArray(5)

Step 2: Initialize the array​

Next, you can initialize the array by assigning values to its elements. You can do this using the index operator ([]). For example, to assign the value 10 to the first element of the array, you can use the following code:

array[0] = 10

You can repeat this step to initialize the other elements of the array.

Step 3: Resize the array​

To resize an array in Kotlin, you need to create a new array with the desired size and copy the elements from the old array to the new array. Kotlin provides the copyOf() function to create a new array with a specified size.

Here's an example that demonstrates how to resize an array:

val newArray = array.copyOf(10)

In this example, we create a new array newArray with a size of 10 by calling the copyOf() function on the existing array array.

Step 4: Copy elements to the resized array​

After creating the new array, you need to copy the elements from the old array to the resized array. Kotlin provides the copyInto() function to copy elements from one array to another.

Here's an example that demonstrates how to copy elements to the resized array:

array.copyInto(newArray)

In this example, we copy the elements from the old array array to the new array newArray using the copyInto() function.

Step 5: Update the array reference​

Finally, you need to update the reference to the array to point to the resized array. This can be done by assigning the resized array to the original array variable.

Here's an example that demonstrates how to update the array reference:

array = newArray

In this example, we update the reference to the array by assigning the resized array newArray to the original array variable array.

That's it! You have successfully resized an array in Kotlin. Remember to update the array reference to point to the resized array in order to use the resized array in your code.