MapExtensions<K, V> extension

Extensions on Map for lookup and transformation.

on

• Map<K, V>

Methods

deepMerge(Map<K, V> other) → Map<K, V>

Available on Map<K, V>, provided by the MapExtensions extension

Recursively merges two maps.

filterKeys(bool test(K key)) → Map<K, V>

Available on Map<K, V>, provided by the MapExtensions extension

Keeps entries whose key matches test.

filterValues(bool test(V value)) → Map<K, V>

Available on Map<K, V>, provided by the MapExtensions extension

Keeps entries whose value matches test.

getOrElse(K key, V defaultValue) → V

Available on Map<K, V>, provided by the MapExtensions extension

Gets a value from a map, or a default value if the key doesn't exist.

getOrPut(K key, V put()) → V

Available on Map<K, V>, provided by the MapExtensions extension

Returns the value for key, computing and storing it if absent.

invert() → Map<V, K>

Available on Map<K, V>, provided by the MapExtensions extension

Swaps keys and values.

keysOf(V value) → List<K>

Available on Map<K, V>, provided by the MapExtensions extension

Keys whose value equals value.

mapKeys<T>(T transform(K key)) → Map<T, V>

Available on Map<K, V>, provided by the MapExtensions extension

Transforms the keys of a map.

mapValues<T>(T transform(V value)) → Map<K, T>

Available on Map<K, V>, provided by the MapExtensions extension

Transforms the values of a map.

merge(Map<K, V> other) → Map<K, V>

Available on Map<K, V>, provided by the MapExtensions extension

Shallow merge with other (other wins on key conflicts).

omit(Iterable<K> keys) → Map<K, V>

Available on Map<K, V>, provided by the MapExtensions extension

Returns a new map without the given keys.

pick(Iterable<K> keys) → Map<K, V>

Available on Map<K, V>, provided by the MapExtensions extension

Returns a new map with only the given keys (missing keys ignored).

where(bool test(K key, V value)) → Map<K, V>

Available on Map<K, V>, provided by the MapExtensions extension

Filters a map based on a predicate.