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7 lines
213 B
7 lines
213 B
3 years ago
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typedef MapFunction<T, K> = T Function(K key);
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extension MapKeysExtension<K, V> on Map<K, V> {
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Map<T, V> mapKeys<T>(MapFunction<T, K> keyMapper) =>
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map((key, value) => MapEntry(keyMapper(key), value));
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}
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