42 lines
963 B
Rust
42 lines
963 B
Rust
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use std::error::Error;
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use std::io;
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use std::process;
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use serde::Serialize;
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#[derive(Debug, Serialize)]
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struct Record {
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city: String,
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region: String,
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country: String,
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population: Option<u64>,
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}
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fn example() -> Result<(), Box<dyn Error>> {
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let mut wtr = csv::Writer::from_writer(io::stdout());
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// When writing records with Serde using structs, the header row is written
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// automatically.
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wtr.serialize(Record {
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city: "Southborough".to_string(),
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region: "MA".to_string(),
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country: "United States".to_string(),
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population: Some(9686),
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})?;
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wtr.serialize(Record {
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city: "Northbridge".to_string(),
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region: "MA".to_string(),
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country: "United States".to_string(),
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population: Some(14061),
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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) = example() {
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println!("error running example: {}", err);
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process::exit(1);
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}
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}
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