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master
examples/tutorial-write-02.rs
42 строки
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Paolo Barbolini
style: address many Clippy lints
17 окт 2025, 14:51
Не верифицирован
17 окт 2025, 14:51
7c7c135
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use std::{env, error::Error, ffi::OsString, process}; fn run() -> Result<(), Box<dyn Error>> { let file_path = get_first_arg()?; let mut wtr = csv::Writer::from_path(file_path)?; wtr.write_record([ "City", "State", "Population", "Latitude", "Longitude", ])?; wtr.write_record([ "Davidsons Landing", "AK", "", "65.2419444", "-165.2716667", ])?; wtr.write_record(["Kenai", "AK", "7610", "60.5544444", "-151.2583333"])?; wtr.write_record(["Oakman", "AL", "", "33.7133333", "-87.3886111"])?; wtr.flush()?; Ok(()) } /// Returns the first positional argument sent to this process. If there are no /// positional arguments, then this returns an error. fn get_first_arg() -> Result<OsString, Box<dyn Error>> { match env::args_os().nth(1) { None => Err(From::from("expected 1 argument, but got none")), Some(file_path) => Ok(file_path), } } fn main() { if let Err(err) = run() { println!("{}", err); process::exit(1); } }