Dart - How to sort Map's keys

Question

I have question in sorting Map's key in Dart.

Map<String, Object> map = new Map(); 

How can I sort the keys in map? or Sort the Iterable map.keys.

Answer 1

In Dart, it's called SplayTreeMap:

import "dart:collection";  main() {   final SplayTreeMap<String, Map<String,String>> st =        SplayTreeMap<String, Map<String,String>>();    st["yyy"] = {"should be" : "3rd"};   st["zzz"] = {"should be" : "last"};   st["aaa"] = {"should be" : "first"};   st["bbb"] = {"should be" : "2nd"};    for (final String key in st.keys) {     print("$key : ${st[key]}");   } }  // Output: // aaa : first // bbb : 2nd // yyy : 3rd // zzz : last 

Answer 2

If you want a sorted List of the map's keys:

var sortedKeys = map.keys.toList()..sort(); 

You can optionally pass a custom sort function to the List.sort method.

Finally, might I suggest using Map<String, dynamic> rather than Map<String, Object>?