MapExtensions<K, V> extension

Common Map extensions

on

• Map<K, V>

Methods

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

Filters the map based on a condition applied to its keys.

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

Filters the map based on a condition applied to its values.

getOrDefault(K key, V defaultValue) → V?

Retrieves the value for the specified key from the map. If the key does not exist, returns the provided defaultValue.

getOrNull(K key) → V?

Retrieves the value for the specified key from the map. If the key does not exist, returns null.

invert() → Map<V, K>

Inverts the map by swapping its keys and values. Assumes that the values are unique.

merge(Map<K, V> other, V resolve(V v1, V v2)?) → Map<K, V>

Merges this map with another other map. For duplicate keys, resolve determines the final value.

toJsonString() → String

Converts the map to a JSON string.

toJsonStringWithIndent([int spaces = 2]) → String

Converts the map to a formatted JSON string, with specified indentation.