切片指针跟指针切片的循环注意事项（重要）

package main

import "fmt"

func main() {
   //var x,y,z = 1,2,3
   var s []*int = []*int{new(int)}

   for i:=range s {                 
      fmt.Println(*s[i])    //s=nil会报错，空指针不可取值   = 0
   }
   var l *[]int

   l=&[]int{1,2,3}
   *l= append(*l, *l...)
   
   for _,x:=range (*l) {
      fmt.Println(x) // 被引用 1,2,3 1,2,3
      
   }

}

package main

import "fmt"

func RemoveSlicStr(o []string,p string) []string {    //单个切片切割，浅拷贝

   for i:=0;i<len(o);i++{
      if o[i] == p {
         o = append(o[:i], o[i+1:]...)
         i--

      }
   }
   return o

}

func main() {
   o:=[]string{"cheyunhua","che"}
   fmt.Println(RemoveSlicStr(o,"che"))


}

package main

import "fmt"

func RemoveSlicStr(o []string,p string) (n []string) {   //比较消耗资源，引用类型，深

   for i,v:=range o{
      if o[i] != p {
         n = append(n, v)
         return n



      }
   }
   return

}

func main() {
   o:=[]string{"cheyunhua","che"}
   fmt.Println(RemoveSlicStr(o,"che"))


}

//结果
0
1
2
3
1
2
3

 

 

 

func DemoRemoveDubb(o,n []string)  []string{
   var l []string


   m:=map[string]int{}
   for _,v:=range o{
      m[v]++
   }
   for _,x:=range n{
      m[x]++
      if m[x] > 1{
         l=append(l, x)
         //return l   //返回等于 [cheyunhua】不对

      }

   }
   return l

}



func main() {
   o:=[]string{"cheyunhua","test","ffdsf"}
   n:=[]string{"cheyunhua","test","xxx"}
   fmt.Println(DemoRemoveDubb(o,n))



}



//
[cheyunhua test]