How to remove a key/value pair, satisfying some test, from a `Map`.

README.md

#dart:core example

How to remove a key/value pair, satisfying some test, from a Map. Similar as the List.removeWhere method.

Main library: dart:core
Main elements: Map Map.remove
Gist: https://gist.github.com/kasperpeulen/7fbb9d27a05b7534a808
DartPad: https://dartpad.dartlang.org/7fbb9d27a05b7534a808
Tags: #removeWhere

main.dart

void main() {
  Map map = {
    0: "not null",
    1: null
  };
  bool test(key) => map[key] == null;

  // This will remove all key/value pairs where the value is null.
  map.keys.where(test).toList().forEach(map.remove);

  // So the map should be of length 1 now.
  assert(map.length == 1);

  // prints {0: not null}
  print(map);
}

pubspec.yaml

name: dart.core_Map_Map.remove_'removeWhere'
description: |
  How to remove a key/value pair, satisfying some test, from a `Map`.
  Similar as the `List.removeWhere` method.
homepage: https://gist.github.com/kasperpeulen/7fbb9d27a05b7534a808
homepage: https://gist.github.com/kasperpeulen/7fbb9d27a05b7534a808
environment:
  sdk: '>=1.0.0 <2.0.0'