Merge pull request #41 from netglade/feat/mapIndex-map-where

Add mapIndexed2 and where on map type extension

Author: petrnymsa

packages/netglade_utils/CHANGELOG.md

@@ -1,4 +1,8 @@
 
+## 2.2.0
+- Add `mapIndexed2` - replacement for built-in mapIndexed which uses sync*
+- Add `where` extension on Map type - returning new map instance. 
+
 ## 2.1.0
 - Add `byNameOrDefault` and `byNameOrNull` Enum's extensions.
 - Add `normalizeUrl` and `rtrim` String's extensions.

packages/netglade_utils/lib/src/extensions/iterable_extensions.dart

@@ -13,6 +13,12 @@ extension IterableExtensions<T> on Iterable<T> {
 
     return result.values;
   }
+
+  /// Maps into [K] with index.
+  ///
+  /// Faster than mapIndexed `sync*`.
+  // ignore: prefer-typedefs-for-callbacks, ok to have it inline, avoid-positional-record-field-access
+  Iterable<K> mapIndexed2<K>(K Function(int index, T value) map) => indexed.map((entry) => map(entry.$1, entry.$2));
 }
 
 extension IterableIterableExtension<T> on Iterable<Iterable<T>> {

packages/netglade_utils/lib/src/extensions/map_extensions.dart

@@ -0,0 +1,15 @@
+extension MapExtensions<KEY, VALUE> on Map<KEY, VALUE> {
+  /// Immutable where on maps.
+  // ignore: prefer-typedefs-for-callbacks, ok to have it inline.
+  Map<KEY2, VALUE2> where<KEY2, VALUE2>(bool Function(KEY key, VALUE value) test) {
+    final result = <KEY2, VALUE2>{};
+
+    for (final entry in entries) {
+      if (test(entry.key, entry.value)) {
+        result[entry.key as KEY2] = entry.value as VALUE2;
+      }
+    }
+
+    return result;
+  }
+}

packages/netglade_utils/pubspec.yaml

@@ -1,5 +1,5 @@
 name: netglade_utils
-version: 2.1.0
+version: 2.2.0
 description: Dart utils used internally at netglade.
 repository: https://github.com/netglade/flutter_core/tree/main/packages/netglade_utils
 issue_tracker: https://github.com/netglade/flutter_core/issues