Kas saaksite selgitada, mis on lõik (slice) programmeerimises ja kuidas see töötab?

In Go, a slice is a dynamic, resizable fragment of an array. It is a structure that contains:

• a pointer to the first element of the array,
• the length (number of elements in the slice),
• the capacity (the maximum number of elements the slice can hold without reallocation).

Slices allow working with sequences of elements without copying data.

Example of creating and using a slice:

arr := [5]int{1, 2, 3, 4, 5}
slice := arr[1:4] // slice of elements with indices 1,2,3
fmt.Println(slice) // [2 3 4]

slice = append(slice, 6) // add an element, if necessary, new memory is allocated
fmt.Println(slice) // [2 3 4 6]

Slices are useful because they can be created from existing slices, their size can be changed, and they can be passed to functions without copying the entire array.