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fn parse_csv(args: Vec<String>) -> Result<(), Box<dyn Error>> {// Read the CSV file// assuming it has a header#[cfg(not(pipe))]let mut rdr = csv::ReaderBuilder::new().has_headers(true).delimiter(b';').from_path(&args[1])?;#[cfg(pipe)]
let mut transaction_buffer: Vec<[String; 16]> = Vec::new();// The file is read from top to bottom, ICA exorts// the most recent transactions at the top// thus the deserialization goes "backwards" in time//// This is of special importance when parsing transaction_number// with multiple transactions during the same day
wtr.write_record(&[
// If this is the second time a date appearsif last_seen_date == record.datum {// Store the record in write buffer} else {// A fresh new date, print all buffer contentswrite_csv(&mut wtr, &mut transaction_buffer)?;// Set the last seen datelast_seen_date = record.datum.clone();}transaction_buffer.push([
if let Err(err) = example() {println!("error running example: {}", err);
let args: Vec<String> = env::args().collect();println!(" Input file: {}", args[1]);println!("Output file: {}", args[2]);if let Err(err) = parse_csv(args) {println!("Unable to parse CSV: {}", err);
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