Delete selected keys from Dart Map

Question

What is the Dart idiomatic way to remove selected keys from a Map? Below I'm using a temporary emptyList to hold String keys. Is there a cleaner way?

List<String> emptyList = new List<String>(); _objTable.keys.forEach((String name) {    if (_objTable[name].indices.isEmpty) {     emptyList.add(name);     print("OBJ: deleting empty object=$name loaded from url=$url");   }  }); emptyList.forEach((String name) => _objTable.remove(name)); 

Answer 1

Simply do:

_objTable.removeWhere((key, value) => key == "propertyName"); 

It works with nested Maps too.

Answer 2

You can do something like this :

_objTable.keys   .where((k) => _objTable[k].indices.isEmpty) // filter keys   .toList() // create a copy to avoid concurrent modifications   .forEach(_objTable.remove); // remove selected keys