flutter - Dart: convert Map to List of Objects

Question

Did several google searches, nothing helpful came up. Been banging my head against some errors when trying to do something that should be pretty simple. Convert a map such as {2019-07-26 15:08:42.889861: 150, 2019-07-27 10:26:28.909330: 182} into a list of objects with the format:

class Weight {
  final DateTime date;
  final double weight;
  bool selected = false;

  Weight(this.date, this.weight);
}

I've tried things like: List<Weight> weightData = weights.map((key, value) => Weight(key, value));

There's no toList() method for maps, apparently. So far I'm not loving maps in dart. Nomenclature is confusing between the object type map and the map function. Makes troubleshooting on the internet excruciating.

question from:https://stackoverflow.com/questions/57234575/dart-convert-map-to-list-of-objects

Answer 1

Following on Richard Heap's comment above, I would:

List<Weight> weightData =
  mapData.entries.map( (entry) => Weight(entry.key, entry.value)).toList();

Don't forget to call toList, as Dart's map returns a kind of Iterable.