Golang中深拷贝与浅拷贝详解

package main

import (
	"fmt"
	"reflect"
	"unsafe"
)

func main() {
	slice1 := []int{1, 2, 3, 4, 5, 6}

	//slice2是slice1的浅拷贝
	slice2 := slice1
	fmt.Println(slice1)
	fmt.Println(slice2)

	//修改slice1的值，slice2的值也会发生改变
	slice1[1] = 100
	fmt.Println(slice1)
	fmt.Println(slice2)

	//slice1和slice2的地址是一样的
	fmt.Println("slice1地址:", (*reflect.SliceHeader)(unsafe.Pointer(&slice1)))
	fmt.Println("slice2地址:", (*reflect.SliceHeader)(unsafe.Pointer(&slice2)))
}

package main

import (
	"fmt"
	"reflect"
	"unsafe"
)

func main() {
	src := []int{1, 2, 3, 4, 5, 6}

	//输出一下src的初度和值
	fmt.Println("src长度:", len(src), "src:", src)
	//输出一下src地址
	fmt.Println("src地址:", (*reflect.SliceHeader)(unsafe.Pointer(&src)))

	dst1 := make([]int, 2)
	copy(dst1, src)
	fmt.Println("dst1长度:", len(dst1), "dst1:", dst1)
	fmt.Println("dst1地址:", (*reflect.SliceHeader)(unsafe.Pointer(&dst1)))

	dst2 := make([]int, len(src))
	copy(dst2, src)
	fmt.Println("dst2长度:", len(dst2), "dst2:", dst2)
	fmt.Println("dst2地址:", (*reflect.SliceHeader)(unsafe.Pointer(&dst2)))

	dst3 := make([]int, len(src)+2)
	copy(dst3, src)
	fmt.Println("dst3长度:", len(dst3), "dst3:", dst3)
	fmt.Println("dst3地址:", (*reflect.SliceHeader)(unsafe.Pointer(&dst3)))
}