Golang找两个切片的交差集

func difference(slice1, slice2 []int) []int {   //取要校验的和已经校验过的差集，找出需要校验的切片IP（找出slice1中  slice2中没有的）
    m := make(map[int]int)
    n := make([]int,0)
    inter := intersect(slice1, slice2)
    for _, v := range inter {
        m[v]++
    }
    for _, value := range slice1 {
        if m[value] == 0 {
            n = append(n, value)
        }
    }

    for _, v := range slice2 {
        if m[v] == 0 {
            n = append(n, v)
        }
    }
    return n
}



func intersect(slice1, slice2 []int) []int { // 取两个切片的交集
    m := make(map[int]int)
    n := make([]int, 0)
    for _, v := range slice1 {
        m[v]++
    }
    for _, v := range slice2 {
        times, _ := m[v]
        if times == 1 {
            n = append(n, v)
        }
    }
    return n

}

摘自：https://blog.csdn.net/weixin_43202081/article/details/108050870

 

第二种：

//第二种
func getDifference( slice1, slice2 []int) []int {
    var diff []int
    for _,val:= range slice1{
        if bool := Contain(val, slice2); bool ==  false{
            diff = append(diff,val)
        }
    }
    return diff
}
func Contain(obj interface{}, target interface{}) (bool) {
    targetValue := reflect.ValueOf(target)
    switch reflect.TypeOf(target).Kind() {
    case reflect.Slice, reflect.Array:
        for i := 0; i < targetValue.Len(); i++ {
            fmt.Println("****",targetValue.Index(i))
            if targetValue.Index(i).Interface() == obj {
                return true
            }
        }
    }

    return false
}

第三种：

package php
 
//ArrayDiff 模拟PHP array_diff函数
func ArrayDiff(array1 []interface{}, othersParams ...[]interface{}) ([]interface{}, error) {
    if len(array1) == 0 {
        return []interface{}{}, nil
    }
    if len(array1) > 0 && len(othersParams) == 0 {
        return array1, nil
    }
    var tmp = make(map[interface{}]int, len(array1))
    for _, v := range array1 {
        tmp[v] = 1
    }
    for _, param := range othersParams {
        for _, arg := range param {
            if tmp[arg] != 0 {
                tmp[arg]++
            }
        }
    }
    var res = make([]interface{}, 0, len(tmp))
    for k, v := range tmp {
        if v == 1 {
            res = append(res, k)
        }
    }
    return res, nil
}
 
//ArrayIntersect 模拟PHP array_intersect函数
func ArrayIntersect(array1 []interface{}, othersParams ...[]interface{}) ([]interface{}, error) {
    if len(array1) == 0 {
        return []interface{}{}, nil
    }
    if len(array1) > 0 && len(othersParams) == 0 {
        return array1, nil
    }
    var tmp = make(map[interface{}]int, len(array1))
    for _, v := range array1 {
        tmp[v] = 1
    }
    for _, param := range othersParams {
        for _, arg := range param {
            if tmp[arg] != 0 {
                tmp[arg]++
            }
        }
    }
    var res = make([]interface{}, 0, len(tmp))
    for k, v := range tmp {
        if v > 1 {
            res = append(res, k)
        }
    }
    return res, nil
}




//demo
    var sl2 = []interface{}{7, 8, 9, 10, "ff"}
 
    var sl3 = []interface{}{"sds", "dddd", "ff", "yy"}
  
    res, err := php.ArrayIntersect(sl2, sl3)
    if err == nil {
        fmt.Println(res)
    } else {
        fmt.Println(err)
    }