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 list = <String>[];
  var node = _head;
  while (node != null) {
    list.add('${node.key}:${node.value}');
    node = node.trail;
  }
  return list.join(' -> ');
}