toString method
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 numerator = <String>[];
final denominator = <String>[];
final keys = _terms.keys.toList()..sort();
for (final key in keys) {
final exp = _terms[key]!;
final absExp = exp.abs();
final token = absExp == 1 ? key : '$key^$absExp';
if (exp > 0) {
numerator.add(token);
} else {
denominator.add(token);
}
}
final numeratorText = numerator.isEmpty ? '1' : numerator.join('*');
if (denominator.isEmpty) return numeratorText;
return '$numeratorText/${denominator.join('*')}';
}