Go array & slice

A slice does not store any data, it just describes a section of an underlying array.

Changing the elements of a slice modifies the corresponding elements of its underlying array.

Other slices that share the same underlying array will see those changes.

When initialising a variable with a composite literal, Go requires that each line of the composite literal end with a comma, even the last line of your declaration.

package main

import "fmt"

func main() {
    names := [4]string{
        "Alice",
        "Jack",
        "Johnny",
        "Zed",
    }
    fmt.Println(names)

    a := names[0: 2]
    b := names[1: 3]
    fmt.Println(a, b)

    b[0] = "XXX"
    fmt.Println(a, b)
    fmt.Println(names)
}

[Alice Jack Johnny Zed]
[Alice Jack] [Jack Johnny]
[Alice XXX] [XXX Johnny]
[Alice XXX Johnny Zed]