golang 字符串切片去重实例

package main 
import "fmt" 
func main() {
 var arr = []string{"hello", "hi", "world", "hi", "china", "hello", "hi"}
 fmt.Println(RemoveRepeatedElement(arr))
}
 
//去除重复字符串
func RemoveRepeatedElement(arr []string) (newArr []string) {
 newArr = make([]string, 0)
 for i := 0; i < len(arr); i++ {
  repeat := false
  for j := i + 1; j < len(arr); j++ {
   if arr[i] == arr[j] {
    repeat = true
    break
   }
  }
  if !repeat {
   newArr = append(newArr, arr[i])
  }
 }
 return newArr
}

package main 
import(
 "fmt"
 "sort"
)
 
 //去除重复字符串和空格
func RemoveDuplicatesAndEmpty(a []string) (ret []string){
 a_len := len(a)
 for i:=0; i < a_len; i++{
  if (i > 0 && a[i-1] == a[i]) || len(a[i])==0{
   continue;
  }
  ret = append(ret, a[i])
 }
 return
}
 
func main(){
 a := []string{"hello", "", "world", "yes", "hello", "nihao", "shijie", "hello", "yes", "nihao","good"}
 sort.Strings(a)
 fmt.Println(a)
 fmt.Println(RemoveDuplicatesAndEmpty(a))
}

package main 
import (
 "fmt"
)
 
func main() {
 testStr := make([]string, 0)
 testStr = append(testStr, "haha", "hehe", "hoho", "hehe") 
 afterStr := removeDuplicate(testStr)
 fmt.Println(afterStr)
}
 
// 通过map主键唯一的特性过滤重复元素
func removeDuplicate(arr []string) []string {
 resArr := make([]string, 0)
 tmpMap := make(map[string]interface{})
 for _, val := range arr {
  //判断主键为val的map是否存在
  if _, ok := tmpMap[val]; !ok {
   resArr = append(resArr, val)
   tmpMap[val] = nil
  }
 } 
 return resArr
}

// 删除切片中重复的数据
package main
import (
 "fmt"
 "reflect"
 "sort"
)
func main() {
 b := []string{"a", "b", "c", "c", "e", "f", "a", "g", "b", "b", "c"}
 sort.Strings(b)
 fmt.Println(Duplicate(b))
 c := []int{1, 1, 2, 4, 6, 7, 8, 4, 3, 2, 5, 6, 6, 8}
 sort.Ints(c)
 fmt.Println(DeleteDuplicateValue(c))
}
func Duplicate(a interface{}) (ret []interface{}) {
 fmt.Printf("a : %+v\n", a)
 va := reflect.ValueOf(a)
 fmt.Printf("va : %+v\n", va)
 for i := 0; i < va.Len(); i++ {
 if i > 0 && reflect.DeepEqual(va.Index(i-1).Interface(), va.Index(i).Interface()) {
 continue
 }
 ret = append(ret, va.Index(i).Interface())
 }
 return ret
}
// 这种方式比较容易理解
func DeleteDuplicateValue(s []int) (ret []int) {
 fmt.Printf("s :%+v\n", s)
 tmpM := make(map[int]int) // key的类型要和切片中的数据类型一致
 for _, v := range s {
 tmpM[v] = 1
 }
 // 先清空s
 s = []int{}
 for i, _ := range tmpM {
 s = append(s, i)
 }
 return s
}