My very first go function, d'aww

first.go

func files(dir string) ([]string, error) {
    files, err := ioutil.ReadDir(dir)

    if err != nil {
        return nil, err
    }

    filenames := make([]string, 0)

    for _, f := range files {
        if string(f.Name()[0]) != "." {
            filenames = append(filenames, f.Name())
        }
    }

    return filenames, nil
}