Go Slices are Pointers to Array Segments


Example

Slices are pointers to arrays, with the length of the segment, and its capacity. They behave as pointers, and assigning their value to another slice, will assign the memory address. To copy a slice value to another, use the built-in copy function: func copy(dst, src []Type) int (returns the amount of items copied).

package main

import (
    "fmt"
)

func main() {
    x := []byte{'a', 'b', 'c'}
    fmt.Printf("%s", x)       // prints: abc
    y := x
    y[0], y[1], y[2] = 'x', 'y', 'z'
    fmt.Printf("%s", x)       // prints: xyz
    z := make([]byte, len(x))
    // To copy the value to another slice, but 
    // but not the memory address use copy:
    _ = copy(z, x)            // returns count of items copied
    fmt.Printf("%s", z)       // prints: xyz
    z[0], z[1], z[2] = 'a', 'b', 'c'
    fmt.Printf("%s", x)       // prints: xyz
    fmt.Printf("%s", z)       // prints: abc
}