GO语言内存拷贝

package main

import "fmt"

func main() {

	slice1 := []byte{1, 2, 3, 4, 5} 
	slice2 := []byte{5, 4, 3} 

	copy(slice2, slice1) // 只会复制slice1的前3个元素到slice2中 
	fmt.Printf("%x\n",slice1)
	fmt.Printf("%x\n",slice2)


	copy(slice1, slice2) // 只会复制slice2的3个元素到slice1的前3个位置
	fmt.Printf("%x\n",slice1)
	fmt.Printf("%x\n",slice2)

	var md5code [16]byte
	arybyte := md5code[0:16]

	aryb2 := []byte{0,1,2,3,4,5,6,7,8,9,0xA,0xB,0xC,0xD,0xE,0xF}
	copy(arybyte,aryb2)

    fmt.Printf("%x",md5code)
}

/*
D:\gotest>go build copytest.go

D:\gotest>copytest.exe
0102030405
010203
0102030405
010203
000102030405060708090a0b0c0d0e0f
*/