Rust

CSV Append a Column with Values

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Append an additional column and initialize with a value. Rust

// First initialize the CSV with content.  

// 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();

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

// Now let's add a new rightmost column.
let num_columns = csv.num_columns();
let num_rows = csv.num_rows();

// Set the column name.
let column_idx = num_columns;
let _ = csv.set_column_name(column_idx, "new_column");

// Add the column to each row.
let mut i = 0;
while i < num_rows {
    let _ = csv.set_cell(i, column_idx, "newData");
    i = i + 1;
}

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