How to sort a slice in go without mutating the original slice

Question

In Golang, I am trying to sort a slice without mutating the original value

func main() {
    originalArray := []int{4, 2, 1, 1, 2}
    newArray := originalArray
    sort.Ints(newArray)

    fmt.Printf("%v", originalArray) // prints [1 1 2 2 4]
}

How can I sort a slice in golang without mutating the original value?

Answer 1

You need to make a copy of the original slice.

Use:

newArray := make([]int, len(originalArray))
copy(newArray, originalArray)

or:

newArray := append([]int{}, originalArray...)