http://stackoverflow.com/questions/29158406/creating-a-string-from-vecchar Pythonでいうstring.join(list)っぽいのやりたい。 let mut as_str: Vec<String> = Vec::new(); for (key, val) in &map { let raw = format!(r#"key:{0} val:{1}"#, key, val); as_str</string>…