CODEWITHSUNDEEP
functiongostruct
Mirabeau
Mirabeau

Reputation: 52

How to pass a struct as an argument of a function

I have several configuration JSON files, each of which has a specific struc type for each file

currently I created a function per file/struct name:

type ConfigOne struct {
    App     string `json:"app"`
    Web     string `json:"web"`
    Archive string `json:"archive"`
}

type ConfigTwo struct {
    Options string `json:"options"`
    Source  string `json:"source"`
    Backup  bool `json:"backup"`
}
    
func ReadJsonConfigOne(file string, config *ConfigOne) error {
    str := GetContentFile(file)
    return json.Unmarshal([]byte(str), config)
}

func ReadJsonConfigTwo(file string, config *ConfigTwo) error {
    str := GetContentFile(file)
    return json.Unmarshal([]byte(str), config)
}

func main() {
    One := ConfigOne{}
    err := ReadJsonConfigOne("file_one.json", &One)
    
    Two := ConfigTwo{}
    err := ReadJsonConfigTwo("file_two.json", &Two)
    
    ../..
}

How to use only one function and passing a the struct as a parameter?

Upvotes: 0

Views: 39

Answers (1)

sonus21
sonus21

Reputation: 5388

func ReadJsonConfig(file string, config interface{}) error {
    str := GetContentFile(file)
    return json.Unmarshal([]byte(str), config)
}

Usage

func main() {
    One := ConfigOne{}
    err := ReadJsonConfig("file_one.json", &One)
    
    Two := ConfigTwo{}
    err := ReadJsonConfig("file_two.json", &Two)
    
    ../..
}

Use interface as function parameter.

Upvotes: 3

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