let name = "hoge"; let capitalized_name = format!("{}{}", &name[0..1].to_uppercase(), &name[1..name.len()]);
to_capitalとかあればいいが
let name = "hoge"; let capitalized_name = format!("{}{}", &name[0..1].to_uppercase(), &name[1..name.len()]);
to_capitalとかあればいいが