51 lines
1.1 KiB
Rust
51 lines
1.1 KiB
Rust
use std::{error::Error, io, process};
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use serde::Serialize;
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// Note that structs can derive both Serialize and Deserialize!
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#[derive(Debug, Serialize)]
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#[serde(rename_all = "PascalCase")]
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struct Record<'a> {
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city: &'a str,
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state: &'a str,
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population: Option<u64>,
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latitude: f64,
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longitude: f64,
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}
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fn run() -> Result<(), Box<dyn Error>> {
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let mut wtr = csv::Writer::from_writer(io::stdout());
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wtr.serialize(Record {
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city: "Davidsons Landing",
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state: "AK",
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population: None,
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latitude: 65.2419444,
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longitude: -165.2716667,
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})?;
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wtr.serialize(Record {
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city: "Kenai",
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state: "AK",
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population: Some(7610),
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latitude: 60.5544444,
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longitude: -151.2583333,
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})?;
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wtr.serialize(Record {
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city: "Oakman",
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state: "AL",
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population: None,
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latitude: 33.7133333,
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longitude: -87.3886111,
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})?;
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wtr.flush()?;
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Ok(())
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}
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fn main() {
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if let Err(err) = run() {
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println!("{}", err);
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process::exit(1);
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}
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}
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