Mastering Go - Second Edition

Another example with slices

The Go code of the slices.go program will hopefully clarify many things about slices and will be presented in five parts.

The first part of the program contains the expected preamble as well as the definition of two slices:

package main 
 
import ( 
    "fmt" 
) 
 
func main() { 
    aSlice := []int{1, 2, 3, 4, 5} 
    fmt.Println(aSlice) 
    integers := make([]int, 2) 
    fmt.Println(integers) 
    integers = nil 
    fmt.Println(integers) 

The second part shows how to use the [:] notation to create a new slice that references an existing array. Remember that you are not creating a copy of the array, just a reference to it that will be verified in the output of the program:

 anArray := [5]int{-1, -2, -3, -4, -5} refAnArray := anArray[:] fmt.Println(anArray) ...