Day3 - CSV - Writer::from_file() deprecated

[Sefrys]

The method from_file() for Writer from BurntSushi's CSV crate has been deprecated a while ago and replaced by from_path(). As a relatively new person to Rust, this kind of got me stuck with the presented examples for writing into a CSV file until I dug into the documentation :).

Instead of:

let dollar_films = vec![
    ("A Fistful of Dollars", "Rojo", 1964),
    ("For a Few Dollars More", "El Indio", 1965),
    ("The Good, the Bad and the Ugly", "Tuco", 1966),
];
let path = "westerns.csv";
let mut writer = Writer::from_file(path).unwrap();
for row in dollar_films {
    writer.encode(row).expect("CSV writer error");
}

The following works just fine using the current version of CSV crate (1.1.1):

let dollar_films = vec![
    ["A Fistful of Dollars", "Rojo", "1964"],
    ["For a Few Dollars More", "El Indio", "1965"],
    ["The Good, the Bad and the Ugly", "Tuco", "1966"],
];
let path = "westerns.cvs";
let mut writer = Writer::from_path(path).unwrap();
for row in dollar_films {
    writer.write_record(&row).expect("CSV writer error");
    writer.flush();
}

[nitzel]

For others being stuck here, as of CSV v 1.1.3
writer.encode(row)
has changed to
writer.serialize(row)
as well.

Then you can keep the type of dollay_films a Vec<(&str, &str, i32)> instead of changing it to Vec<[&str; _]> by storing the years as strings instead of numbers.

---

Also, to be able to serialize Movie with csv:

in Cargo.toml, add dependency serde = { version = "1.0", features = ["derive"] }
and then in day3.rs

use serde::{Serialize, Deserialize};

#[derive(Serialize, Deserialize, Debug)] // Debug to be able to print movies
struct Movie { // ..

---

To skip the csv headers one now needs to configure the reader via:

  let mut rb = ReaderBuilder::new();
  rb.has_headers(false);

  let mut reader = rb.from_path(path).unwrap();