golang：从切片中删除一个元素

Posted 2023-02-22 IGuoSJ

package main

import "fmt"

/*
 Author: Guo
 Date: 3/16/21 2:24 PM
 Description:
 Company: 
 Updated: ??@??@?? ????
*/

//方式一：使用copy()
func removeSample1(in []interface, index int) ([]interface, bool) 
	if len(in) == 0 || index < 0 
		return in, false
	
	if len(in)-1 == index 
		return in[:len(in)-1], true
	
	if len(in)-1 < index 
		return in, false
	
	copy(in[index:], in[index+1:])
	return in[:len(in)-1], true

//方式二：使用append()
func removeSample2(in []interface, index int) ([]interface, bool) 
	if len(in) == 0 || index < 0 
		return in, false
	
	if len(in)-1 == index 
		return in[:len(in)-1], true
	
	if len(in)-1 < index 
		return in, false
	
	return append(in[:index], in[index+1:]...), true


func main() 
	in1 := make([]interface, 0)
	fmt.Println(removeSample2(in1, -1))
	fmt.Println(removeSample2(in1, 0))
	in2 := []interface1
	fmt.Println(removeSample2(in2, -1))
	fmt.Println(removeSample2(in2, 0))
	fmt.Println(removeSample2(in2, 1))
	in3 := []interface1, 2, 3, 4
	fmt.Println(removeSample2(in3, 0))
	in4 := []interface1, 2, 3, 4
	fmt.Println(removeSample2(in4, 1))
	in5 := []interface1, 2, 3, 4
	fmt.Println(removeSample2(in5, 2))


//其中返回的bool值表示要删除的元素是否存在

执行结果：

[] false
[] false
[1] false
[] true
[1] false
[2 3 4] true
[1 3 4] true
[1 2 4] true