MapExtension<K, V> extension

Extension for Map<K, V>.

on

• Map<K, V>

Methods

copy() → Map<K, V>

Copies this Map.

equalsKeysValues(Iterable<K> keys, Map<K, V> other) → bool

Returns true if other have keys of equals value.

filterKey(K key, V filter(V val)) → bool

Filter key with filter.

getStringKeyValue(String key) → V?

Returns a value by String key, treating all this instance keys as String.

getUnknownKeys(Iterable<K> knownKeys) → List<K>

Returns all unknown keys, not present at knownKeys.

getValuesInKeysOrder(Iterable<K> keys) → List<V>

Returns the values for keys (in the same order).

getValuesInStringKeysOrder(Iterable<String> keys) → List<V>

Returns the values for keys (in the same order), using getStringKeyValue.

keepKeys(Iterable<K> keys) → void

Only keep keys, removing any key not in keys parameter.

keepKeysAndReturnValus(Iterable<K> keys) → Map<K, V>

Only keep keys, removing any key not in keys parameter, than return a Map with them.

mergeKeysValues<M>(Map<K, V> other, M merger(K key, V val1, V val2), {V onAbsentKey(K key, bool other)?}) → Map<K, M>

Merge this instance with other, calling merger for each key (of both Maps).

mergeKeysValuesNullable<M>(Map<K, V> other, M merger(K key, V? val1, V? val2)) → Map<K, M>

Same as mergeKeysValues, but allows null at merger.

mergeKeysValuesToList(Map<K, V> other, {V onAbsentKey(K key, bool other)?}) → Map<K, List<V>>

Merge this instance with other, merging keys values to a List<V>. See mergeKeysValues.

mergeKeysValuesToListNoNulls(Map<K, V> other) → Map<K, List<V>>

Same as mergeKeysValuesToList, but ignore null values. See mergeKeysValues.

mergeKeysValuesToListNullable(Map<K, V> other) → Map<K, List<V?>>

Same as mergeKeysValuesToList, but allows null values. See mergeKeysValues.

printElements({dynamic printer(Object? o)?, String prefix = '', String keyDelimiter = ': '}) → void

Prints this Map entries to printer, using keyDelimiter ("$key$keyDelimiter$value") to map each entry to String.

removeKeys(Iterable<K> keys) → void

Remove keys.

removeKeysAndReturnValues(Iterable<K> keys) → Map<K, V>

Removes keys and return a Map with them.

renameKeys(Map<K, K> rename) → void

Rename the keys using the rename mapper.