toString method

@override String toString()

A string representation of this object.

Some classes have a default textual representation, often paired with a static parse function (like int.parse). These classes will provide the textual representation as their string representation.

Other classes have no meaningful textual representation that a program will care about. Such classes will typically override toString to provide useful information when inspecting the object, mainly for debugging or logging.

Implementation

@override
String toString() {
  var buffer = StringBuffer();
  buffer.writeln(columns.join(' | '));
  buffer.writeln('-' * (columns.length * 8));
  for (var row in rows.take(5)) {
    buffer.writeln(row.map((v) => v?.toString() ?? 'null').join(' | '));
  }
  if (rows.length > 5) {
    buffer.writeln('... ${rows.length - 5} more rows');
  }
  return buffer.toString();
}