fromIterable<K, V, I> static method
IMapOfSets<K, V>
fromIterable<K, V, I>(
- Iterable<
I> iterable, { - K keyMapper(
- I
- V valueMapper(
- I
- bool ignore(
- I
- ConfigMapOfSets? config,
Creates a map of sets instance in which the keys and values are
computed from the iterable
.
For each element of the iterable
it computes a key/value pair,
by applying keyMapper
and valueMapper
respectively. When the key
is new, it will be created with a set containing the value. When the key
already exists, each following value will be added to the existing set.
If keyMapper
and valueMapper
are not specified, the default is the
identity function.
If ignore
is provided and return true, the entry will not be included.
Implementation
@useCopy
static IMapOfSets<K, V> fromIterable<K, V, I>(
Iterable<I> iterable, {
K Function(I)? keyMapper,
V Function(I)? valueMapper,
bool Function(I)? ignore,
ConfigMapOfSets? config,
}) {
Map<K, Set<V>> map = _mutableMapOfSets<K, V, I>(
iterable,
keyMapper: keyMapper,
valueMapper: valueMapper,
ignore: ignore,
);
return IMapOfSets.withConfig(map, config ?? defaultConfig);
}