Check if key exists in multiple maps in one condition

Question

I need to check if the same key exists in two maps:

if v1, ok1 := map1[\"aaa\"]; ok1 {
 ...
}
if v2, ok2 := map2[\"aaa\"]; ok2 {
 ...
}

Is

Answer 1

you could also use variadic parameter(three dots) to check multiple keys :

// check map 1 and map2 is null or not
func checkMap(m1, m2 map[string]interface{}, keys ...string) []bool {
    var isExist []bool

    for key := range keys {
        //checking value from map 1
        _, ok := m1[keys[key]]
        if ok {
            isExist = append(isExist, true) // append for the first time to avoid panic
        } else {
            isExist = append(isExist, false) // append for the first time to avoid panic
        }

        // checking value from map2
        _, ok = m2[keys[key]]
        if ok {
            isExist[key] = true
        } else {
            isExist[key] = false
        }
    }

    return isExist
}

And then you can check your keys in order like this :

result := checkMap(myMap, myMap2, "a", "b", "c", "d", "e", "f", "g")
fmt.Printf("result = %+v\n", result) // print the result

if result[0] {
    fmt.Println("key a exist in both map")
}

if result[1] {
    fmt.Println("key b exist in both map")
}