Rust

CSV Append New Row

Demonstrates how to append a new row to a CSV. Rust

// We have the following CSV...

// permalink,company,numEmps,category,city,state,fundedDate,raisedAmt,raisedCurrency,round
// lifelock,LifeLock,,web,Tempe,AZ,1-May-07,6850000,USD,b
// mycityfaces,MyCityFaces,7,web,Scottsdale,AZ,1-Jan-08,50000,USD,seed
// flypaper,Flypaper,,web,Phoenix,AZ,1-Feb-08,3000000,USD,a
// infusionsoft,Infusionsoft,105,software,Gilbert,AZ,1-Oct-07,9000000,USD,a
// gauto,gAuto,4,web,Scottsdale,AZ,1-Jan-08,250000,USD,seed

let b_crlf = true;
let sb = chilkat::StringBuilder::new();
let _ = sb.append_line("permalink,company,numEmps,category,city,state,fundedDate,raisedAmt,raisedCurrency,round", b_crlf);
let _ = sb.append_line("lifelock,LifeLock,,web,Tempe,AZ,1-May-07,6850000,USD,b", b_crlf);
let _ = sb.append_line("mycityfaces,MyCityFaces,7,web,Scottsdale,AZ,1-Jan-08,50000,USD,seed", b_crlf);
let _ = sb.append_line("flypaper,Flypaper,,web,Phoenix,AZ,1-Feb-08,3000000,USD,a", b_crlf);
let _ = sb.append_line("infusionsoft,Infusionsoft,105,software,Gilbert,AZ,1-Oct-07,9000000,USD,a", b_crlf);
let _ = sb.append_line("gauto,gAuto,4,web,Scottsdale,AZ,1-Jan-08,250000,USD,seed", b_crlf);

let csv = chilkat::Csv::new();

csv.set_has_column_names(true);
let _ = csv.load_from_string(&sb.get_as_string().unwrap_or_default()).is_ok();

// Let's say we want to append the following row:
// yelp,Yelp,,web,San Francisco,CA,1-Jul-04,1000000,USD,a

// If we have the row as-is, we could do this:
let csv_temp = chilkat::Csv::new();
let _ = csv_temp.load_from_string("yelp,Yelp,,web,San Francisco,CA,1-Jul-04,1000000,USD,a").is_ok();
let num_cols = csv_temp.num_columns();
let mut i = 0;
let row = csv.num_rows();
while i < num_cols {
    let _ = csv.set_cell(row, i, &csv_temp.get_cell(0, i).unwrap_or_default());
    i = i + 1;
}

// Show the updated CSV:
println!("{}", csv.save_to_string().unwrap_or_default());

// Output should be:
// permalink,company,numEmps,category,city,state,fundedDate,raisedAmt,raisedCurrency,round
// lifelock,LifeLock,,web,Tempe,AZ,1-May-07,6850000,USD,b
// mycityfaces,MyCityFaces,7,web,Scottsdale,AZ,1-Jan-08,50000,USD,seed
// flypaper,Flypaper,,web,Phoenix,AZ,1-Feb-08,3000000,USD,a
// infusionsoft,Infusionsoft,105,software,Gilbert,AZ,1-Oct-07,9000000,USD,a
// gauto,gAuto,4,web,Scottsdale,AZ,1-Jan-08,250000,USD,seed
// yelp,Yelp,,web,San Francisco,CA,1-Jul-04,1000000,USD,a