如何从Golang的嵌套结构中获取值

Question

Very new to statically typed languages, so I have this complex struct I'm Unmarshalling

type MyStruc1 struct {
    Property1 uint16 `json:property1`
    Property2 struct {
        Sub2Property1 string `json:sub2property1`
        Sub2Property2 uint16 `json:sub2property2`
        Sub2Property3 struct {
            SubSub2Property1 string `json:subsub2property1`
            SubSub2Property2 string `json:subsub2property1`
        } `json:sub2property3`
    } `json:property2`
    Property3 struct {
        Sub3Property1 string `json:sub3property1`
        Sub3Property2 uint16 `json:sub3property2`
        Sub3Property3 struct {
            SubSub3Property1 string `json:subsub3property1`
            SubSub3Property2 string `json:subsub3property1`
        } `json:sub3peroperty3`
    } `json:property3`
    Property4 string `json:property4`
}

How do i write a function or struct method to accept any one of these arrays and return the value from MyStruct1? Is this possible?

strArray1 := []string{"Property2", "Sub2Property3", "SubSub2Property1"}

strArray2 := []string{"Property3", "Sub3Property1"}

strArray3 := []string{"Property4"}

strArray4 := []string{"Property1"}

Thank you ahead of time with any replies

Answer 1

You can with reflect

func FieldBySlice(strct interface{}, fields []string) interface{} {
    val := reflect.ValueOf(strct)
    for _, field := range fields {
        val = val.FieldByName(field)
    }
    return val.Interface()
}

This code works, but you will use it only if very much necessary. It's ugly and not recommended. Try to think different, Go is not scripting, dynamic language