39 lines
1.1 KiB
Dart
39 lines
1.1 KiB
Dart
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extension ExtraList<E> on List<E> {
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bool replace(E old, E newItem) {
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final index = indexOf(old);
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if (index == -1) return false;
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this[index] = newItem;
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return true;
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}
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}
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extension ExtraMapNullableKey<K extends Object, V> on Map<K?, V> {
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Map<K, V> whereNotNullKey() => <K, V>{for (var v in keys.nonNulls) v: this[v] as V};
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}
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extension ExtraMapNullableValue<K extends Object, V> on Map<K, V?> {
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Map<K, V> whereNotNullValue() => <K, V>{for (var kv in entries.where((kv) => kv.value != null)) kv.key: kv.value as V};
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}
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extension ExtraMapNullableKeyValue<K extends Object, V> on Map<K?, V?> {
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Map<K, V?> whereNotNullKey() => <K, V?>{for (var v in keys.nonNulls) v: this[v]};
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Map<K?, V> whereNotNullValue() => <K?, V>{for (var kv in entries.where((kv) => kv.value != null)) kv.key: kv.value as V};
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}
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extension ExtraNumIterable on Iterable<int?> {
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int get sum => fold(0, (prev, v) => prev + (v ?? 0));
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}
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extension ExtraEnum<T extends Enum> on Iterable<T> {
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T safeByName(String name, T defaultValue) {
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try {
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return byName(name);
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} catch (error) {
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return defaultValue;
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}
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}
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}
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