golang学习笔记---make/copy/append

package main

import (

	"fmt"

)

func main() {

	a := [...]int{0, 1, 2, 3, 4, 5, 6, 7}

	s := make([]int, 6)

	b := make([]byte, 5)

	fmt.Println(a)

	fmt.Println(b)

	fmt.Println(s)

	n1 := copy(s, a[0:])

	fmt.Println(n1)

	fmt.Println(s)

	n2 := copy(s, a[2:])

	fmt.Println(n2)

	fmt.Println(s)

	n3 := copy(b, "Hi")

	fmt.Println(n3)

	fmt.Println(b)

}

package main

import (
	"fmt"
)

func main() {

	s0 := []int{0, 0}
	s1 := append(s0, 2)    //s1 ==[]int{0,0,2}
	s2 := append(s1, 3, 5) //s2 ==[]int{0,0,2,3,5}
	s3 := append(s2, s0...)
	fmt.Println(s0, len(s0), cap(s0))
	fmt.Println(s1, len(s1), cap(s1))
	fmt.Println(s2, len(s2), cap(s2))
	fmt.Println(s3, len(s3), cap(s3))

}