How to sort map's values?

Question

Can someone give me a hint? I want to sort a map\'s values by the length of the lists.

var chordtypes = {
  \"maj\": [0, 4, 7],
  \"M7\": [0, 4, 7, 11],
  \"         


        

Answer 1

Using DART language:

Let's say you want to sort a Map with integer key and value of type Foo:

class Foo {
  int x; //it can be any type
}

So you can get the list of all the entries, sort them like a normal list and then rebuild the map:

Map map = //fill map

var entries = map.entries.toList();
entries.sort((MapEntry a, MapEntry b) => a.value.x.compareTo(b.value.x));
map = Map.fromEntries(entries);