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() {
  final buffer = StringBuffer();

  // Printing the matrix in the following format:
  // [1, 2, 3]
  // [4, 5, 6]
  for (var i = 0; i < rowCount; ++i) {
    // Leading opening [
    buffer.write('[');

    for (var j = 0; j < columnCount; ++j) {
      buffer.write(this(i, j));

      // Adding a comma only between two values
      if (j < columnCount - 1) {
        buffer.write(', ');
      }
    }

    // Ending closing ]
    if (i < rowCount - 1) {
      buffer.writeln(']');
    } else {
      buffer.write(']');
    }
  }

  return buffer.toString();
}