go 学习笔记

go笔记

二维数组的copy

package main

import "fmt"

func main() {
	data := [][]string{
		[]string{"id", "title"},
		[]string{"1", "title1"},
		[]string{"2", "title2"},
		[]string{"3", "title3"},
		[]string{"4", "title4"},
	}
	dst := make([][]string, len(data)) // copy的变量, 里面类型根据自己需要来设定,
	copy(dst, data)
	// 修改下标为3的元素
	dst[3] = []string{"AAA", "BBB"}
	fmt.Println(data) //[[id title] [1 title1] [2 title2] [3 title3] [4 title4]]
	fmt.Println(dst)  //[[id title] [1 title1] [2 title2] [AAA BBB] [4 title4]]
	// 删除下标为2的元素
	dst = append(dst[:2], dst[3:]...)
	fmt.Println(data) //[[id title] [1 title1] [2 title2] [3 title3] [4 title4]]
	fmt.Println(dst)  //[[id title] [1 title1] [AAA BBB] [4 title4]]
}