go-learning/tour_of_go/l4/arrays.go

package main

import "fmt"

func main() {
	var aa [2]string

	aa[0] = "Hello"
	aa[1] = "World"
	fmt.Println(aa[0], aa[1])
	fmt.Println(aa)

	primes := [6]int{2, 3, 5, 7, 11, 13}
	fmt.Println(primes)

	var s []int = primes[1:4]
	fmt.Printf("The primes are %d and the slice is %d", primes, s)

	// Slices are references to array sections
	// Changing elements in a slice results in changes to the array
	// So other slices referencing the same array section will also be changed

	names := [4]string{
		"John",
		"Paul",
		"George",
		"Ringo",
	}
	fmt.Println(names)

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

	// Now make some changes
	b[0] = "XXX"
	fmt.Println(a, b)
	fmt.Println(names)

	// Slice literals - like array literals, but without the length
	q := []int{2, 3, 5, 7, 11, 13}
	fmt.Println(q)

	r := []bool{true, false, true, true, false, true}
	fmt.Println(r)

	sx := []struct {
		i int
		b bool
	}{
		{2, true},
		{3, false},
		{5, true},
		{7, true},
		{11, false},
		{13, true},
	}
	fmt.Println(sx)

	// Slice defaults

	ss := []int{2, 3, 5, 7, 11, 13}

	ss = ss[1: 4]
	fmt.Println(ss)

	ss = ss[:2]
	fmt.Println(ss)

	ss = ss[1:]
	fmt.Println(ss)
}