How to delete slices in go language

go languageMethod to delete slices: First create a go sample file; then declare variables; finally pass "ss=append(ss[:index],ss[index 1:]. ..)print("after delete",ss)" can be used to delete slice elements.

The operating environment of this tutorial: Windows 7 system, Go version 1.14, Dell G3 computer.

1. Declare variables, go automatically initializes to nil, length: 0, address: 0, nil

func main(){
    var ss []string;
    fmt.Printf("length:%v \taddr:%p \tisnil:%v",len(ss),ss, ss==nil)    
}
 
---
Running...
 
length:0     addr:0x0     isnil:true
Success: process exited with code 0.

2. Add, delete, insert operations of slices

func main(){
    var ss []string;
    fmt.Printf("[ local print ]\t:\t length:%v\taddr:%p\tisnil:%v\n",len(ss),ss, ss==nil)    
    print("func print",ss)
    //切片尾部追加元素append elemnt
    for i:=0;i<10;i++{
        ss=append(ss,fmt.Sprintf("s%d",i));
    }
    fmt.Printf("[ local print ]\t:\tlength:%v\taddr:%p\tisnil:%v\n",len(ss),ss, ss==nil)    
    print("after append",ss)
    //删除切片元素remove element at index
    index:=5;
    ss=append(ss[:index],ss[index+1:]...)
    print("after delete",ss)
    //在切片中间插入元素insert element at index;
    //注意：保存后部剩余元素，必须新建一个临时切片
    rear:=append([]string{},ss[index:]...) 
    ss=append(ss[0:index],"inserted")
    ss=append(ss,rear...)
    print("after insert",ss)
}
func print(msg string,ss []string){
    fmt.Printf("[ %20s ]\t:\tlength:%v\taddr:%p\tisnil:%v\tcontent:%v",msg,len(ss),ss, ss==nil,ss)    
    fmt.Println()
}
------
Running...
 
[ local print ]    :     length:0    addr:0x0    isnil:true
[           func print ]    :    length:0    addr:0x0    isnil:true    content:[]
[ local print ]    :    length:10    addr:0xc208056000    isnil:false
[         after append ]    :    length:10    addr:0xc208056000    isnil:false    content:[s0 s1 s2 s3 s4 s5 s6 s7 s8 s9]
[         after delete ]    :    length:9    addr:0xc208056000    isnil:false    content:[s0 s1 s2 s3 s4 s6 s7 s8 s9]
[         after insert ]    :    length:10    addr:0xc208056000    isnil:false    content:[s0 s1 s2 s3 s4 inserted s6 s7 s8 s9]
 
Success: process exited with code 0.

Recommended: "go Language Tutorial"

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