CODEWITHSUNDEEP
rubymethodsgoreflection
user130268
user130268

Reputation: 1361

What's the Golang's equivalent of Ruby's "methods" method?

I'm playing with Golang and I want to know if there is a way that can list all the methods or properties I can use on a variable. In Ruby I can simply use some_variable.methods to get all the methods defined on some_variable. Is there a similar thing in Golang?

Upvotes: 1

Views: 307

Answers (2)

Uvelichitel
Uvelichitel

Reputation: 8490

If you only need this in development phase guru development tool can help you a lot.

Upvotes: 2

Not_a_Golfer
Not_a_Golfer

Reputation: 49275

Yes, you can. With reflection, each reflect.Type object can enumerate all the methods the actual type exposes. but it's not a very common or idiomatic thing to do in Go:

import (
    "fmt"
    "reflect"
)

type Foo struct {
}

func (f Foo) Bar() {
}

func (f Foo) Baz() {
}

func main() {

    t := reflect.TypeOf(Foo{})
    for i := 0; i < t.NumMethod(); i++ {
        fmt.Println(t.Method(i).Name)
    }
}
// Output:
// Bar
// Baz

This can also be done on reflect.Value, depending on what you need.

But the real question is - what are you trying to achieve here? Are you trying to check if a type implements an interface or something like this? There probably is a simpler solution to your goal. What is your actual goal?

Upvotes: 6

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