40 lines
989 B
Rust
40 lines
989 B
Rust
use std::error::Error;
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use std::io;
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use std::process;
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// This lets us write `#[derive(Deserialize)]`.
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use serde::Deserialize;
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// We don't need to derive `Debug` (which doesn't require Serde), but it's a
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// good habit to do it for all your types.
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//
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// Notice that the field names in this struct are NOT in the same order as
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// the fields in the CSV data!
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#[derive(Debug, Deserialize)]
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#[serde(rename_all = "PascalCase")]
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struct Record {
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latitude: f64,
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longitude: f64,
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population: Option<u64>,
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city: String,
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state: String,
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}
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fn run() -> Result<(), Box<dyn Error>> {
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let mut rdr = csv::Reader::from_reader(io::stdin());
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for result in rdr.deserialize() {
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let record: Record = result?;
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println!("{:?}", record);
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// Try this if you don't like each record smushed on one line:
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// println!("{:#?}", record);
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}
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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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