1 d3.csv.format = function(rows) {

     2   return rows.map(d3_csv_formatRow).join("\n");

     3 };

     4 

     5 function d3_csv_formatRow(row) {

     6   return row.map(d3_csv_formatValue).join(",");

     7 }

     8 

     9 function d3_csv_formatValue(text) {

    10   return /[",\n]/.test(text)

    11       ? "\"" + text.replace(/\"/g, "\"\"") + "\""

    12       : text;

    13 }