Function parse

docs/tests/v2/es6/js/sanddance.js:77784–77793

(text, f)

      DELIMITER = delimiter.charCodeAt(0);

  function parse(text, f) {
    var convert,
        columns,
        rows = parseRows(text, function (row, i) {
      if (convert) return convert(row, i - 1);
      columns = row, convert = f ? customConverter(row, f) : objectConverter(row);
    });
    rows.columns = columns || [];
    return rows;
  }

  function parseRows(text, f) {
    var rows = [],