如何找到golang中两个切片的拦截结果

Question

There is two slices in string type.I want to finding intercept result in set from the two slices in golang.I want to find the best solution rather than iterating each slice.

first_slice := []string{"F8-E7-1E-14-AE-00", "F8-E7-1E-14-D0-30", "84-18-3A-2F-05-E0","84-18-3A-2F-05-E8" } 
second_slice := []string{"F8-E7-1E-14-D0-30", "84-18-3A-2F-05-E8","F8-E7-1E-54-AE-08"}


Output:
    result_slice := []string{"F8-E7-1E-14-D0-30", "84-18-3A-2F-05-E8"}

I have use following approaches but it is not best approaches for large data set.

var result_slice *[]string

for _, i := range first_slice {
    for _, x := range second_slice {
        if i == x {
            &result_slice.append(i)
        }
    }
}

Appreciate if give me good solution that.

Answer 1

firstSlice := []string{"F8-E7-1E-14-AE-00", "F8-E7-1E-14-D0-30",
    "84-18-3A-2F-05-E0", "84-18-3A-2F-05-E8"}
secondSlice := []string{"F8-E7-1E-14-D0-30", "84-18-3A-2F-05-E8",
    "F8-E7-1E-54-AE-08"}

resultSlice := []string{}
checkMap := map[string]struct{}{}

for _, addr := range firstSlice {
    checkMap[addr] = struct{}{}
}
for _, addr := range secondSlice {
    if _, ok := checkMap[addr]; ok {
        resultSlice = append(resultSlice, addr)
    }
}

fmt.Println(resultSlice)

---

The output is what you want.

An empty struct takes no space in monery

What's more, always use camel in golang.