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

Building on @Leonardo Rignanese's answer. An extension function for a more functional approach:

extension MapExt on Map {
  Map sortedBy(Comparable value(U u)) {
    final entries = this.entries.toList();
    entries.sort((a, b) => value(a.value).compareTo(value(b.value)));
    return Map.fromEntries(entries);
  }
}

General usage:

foos.sortedBy((it) => it.bar);

Usage for OP:

final sortedChordtypes = chordtypes.sortedBy((it) => it.length);

Gist here: https://gist.github.com/nmwilk/68ae0424e848b9f05a8239db6b708390