Zig

CSV Append a Column with Values

See more CSV Examples

Append an additional column and initialize with a value. Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // 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

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

    const csv = try chilkat.Csv.init();
    defer csv.deinit();

    csv.setHasColumnNames(true);
    try csv.loadFromString(try sb.getAsString(alloc));

    // Show the initial CSV:
    std.debug.print("{s}\n", .{try csv.saveToString(alloc)});
    std.debug.print("----\n", .{});

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

    // Set the column name.
    const column_idx = num_columns;
    csv.setColumnName(column_idx, "new_column") catch {};

    // Add the column to each row.
    var i: i32 = 0;
    while (i < num_rows) {
        csv.setCell(i, column_idx, "newData") catch {};
        i = i + 1;
    }

    // Show the updated CSV:
    std.debug.print("{s}\n", .{try csv.saveToString(alloc)});
}