List comprehension in Go

Question

I have an array of structs.

var a = [] struct {
    f1 string
    f2 string
}{
    {"foo", "bar"},
    {"biz", "baz"},
}

I want to pass an array of the f2 fields to a function, like so

var f2s []string
for _, s := range a {
    f2s = append.f2s(s.f2)
}
// f2s = {"bar", "baz"}
SomeFunc(f2s)

Is there a more idiomatic way to do this? In Python I would do SomeFunc([s.f2 for s in a]). In a functional language I would do (SomeFunc (map (lambda (s) (s.f2)) a)).

Answer 1

No, Go has no list coercion or that like. Your code looks fine. For longer slices it might be better to allocate the proper length with make.

Answer 2

No, sincerely, they wouldn't.

Maps and lists comprehension is mainstream enough to be considered basic in any modern language.

It's a nice language with great ideas, but I'm still way far from being comfortable, and often times I feel my code is dirty even when it is idiomatic, well structured code in the Go way of doing things.

Hope this changes in the future.