GroupByIterable<TSource, TKey> class
This class is created by calls to Iterable.groupBy
and isn't intended to be
instantiated directly.
- Inheritance
- Available Extensions
- AggregateExtension
- AggregateRightExtension
- AggregateRightSelectExtension
- AggregateSelectExtension
- AllExtension
- AppendAllExtension
- AppendExtension
- AssertAllExtension
- AssertAnyExtension
- AssertCountExtension
- AtLeastExtension
- AtMostExtension
- AverageExtension
- BatchExtension
- BatchSelectExtension
- BetweenExtension
- CartesianExtension
- CartesianSelectExtension
- CompareCountExtension
- ConcatAllExtension
- ConcatExtension
- ConsumeExtension
- CountByExtension
- Deconstruct1Extension
- Deconstruct2Extension
- Deconstruct3Extension
- Deconstruct4Extension
- Deconstruct5Extension
- Deconstruct6Extension
- Deconstruct7Extension
- Deconstruct8Extension
- Deconstruct9Extension
- DefaultIfEmptyExtension
- DefaultRangeIfEmptyExtension
- DistinctExtension
- ElementAtOrDefaultExtension
- EndsWithExtension
- EnumByName
- ExceptExtension
- ExcludeAtExtension
- ExcludeExtension
- ExcludeRangeExtension
- FillBackwardExtension
- FillForwardExtension
- FillMissingExtension
- FirstOrDefaultExtension
- FirstWhereOrDefaultExtension
- GroupByExtension
- GroupByValueExtension
- GroupJoinExtension
- GroupSelectExtension
- GroupSelectValueExtension
- IndexExtension
- InsertAllExtension
- InsertExtension
- InsertionIterableExtensions
- InsertOrAppendAll
- InsertOrAppendExtension
- InterleaveAllExtension
- InterleaveExtension
- IntersectExtension
- IterableExtensions
- JoinMapExtension
- LagExtension
- LagSelectExtension
- LastOrDefaultExtension
- LastWhereOrDefaultExtension
- LeadExtension
- LeadSelectExtension
- MathConsumerExtensions
- MaxExtension
- MemoizeExtension
- MinExtension
- MoveExtension
- NonNullExtension
- NullableIterableExtensions
- OfTypeExtension
- OrderByDescendingExtension
- OrderByExtension
- PadEndExtension
- PairwiseExtension
- PartitionExtension
- PermutationsExtension
- PrependAllExtension
- PrependExtension
- PreScanExtension
- RandomizeExtension
- RandomSubsetExtension
- RepeatExtension
- ReverseExtension
- ScanExtension
- SelectExtension
- SelectManyExtension
- SequenceEqualsExtension
- SequenceEqualsSelectExtension
- SingleOrDefaultExtension
- SingleWhereOrDefaultExtension
- SkipLastExtension
- SplitExtension
- StartsWithExtension
- SubsetsExtension
- SumExtension
- TakeEveryExtension
- TakeLastExtension
- ThenByDescendingExtension
- ThenByExtension
- ToHashMapExtension
- ToLinkedHashMapExtension
- ToMapExtension
- ToSplayTreeMapExtension
- ToStreamExtension
- TryAggregateExtension
- TryAggregateRightExtension
- TryInsertAllExtension
- TryInsertExtension
- TrySingleOrDefaultExtension
- TrySingleWhereOrDefaultExtension
- UnionExtension
- ZipExtension
Constructors
-
GroupByIterable(Iterable<
TSource> source, TKey keySelector(TSource), EqualityComparer<TKey> keyComparer) -
const
Properties
-
first
→ Grouping<
TKey, TSource> -
The first element.
no setterinherited
- hashCode → int
-
The hash code for this object.
no setterinherited
- isEmpty → bool
-
Whether this collection has no elements.
no setterinherited
- isNotEmpty → bool
-
Whether this collection has at least one element.
no setterinherited
-
iterator
→ Iterator<
Grouping< TKey, TSource> > -
A new
Iterator
that allows iterating the elements of thisIterable
.no setteroverride -
keyComparer
→ EqualityComparer<
TKey> -
final
- keySelector → TKey Function(TSource)
-
final
-
last
→ Grouping<
TKey, TSource> -
The last element.
no setterinherited
- length → int
-
The number of elements in this.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
single
→ Grouping<
TKey, TSource> -
Checks that this iterable has only one element, and returns that element.
no setterinherited
-
source
→ Iterable<
TSource> -
final
Methods
-
any(
bool test(Grouping< TKey, TSource> element)) → bool -
Checks whether any element of this iterable satisfies
test
.inherited -
cast<
R> () → Iterable< R> -
A view of this iterable as an iterable of
R
instances.inherited -
contains(
Object? element) → bool -
Whether the collection contains an element equal to
element
.inherited -
elementAt(
int index) → Grouping< TKey, TSource> -
Returns the
index
th element.inherited -
every(
bool test(Grouping< TKey, TSource> element)) → bool -
Checks whether every element of this iterable satisfies
test
.inherited -
expand<
T> (Iterable< T> toElements(Grouping<TKey, TSource> element)) → Iterable<T> -
Expands each element of this Iterable into zero or more elements.
inherited
-
firstWhere(
bool test(Grouping< TKey, TSource> element), {Grouping<TKey, TSource> orElse()?}) → Grouping<TKey, TSource> -
The first element that satisfies the given predicate
test
.inherited -
fold<
T> (T initialValue, T combine(T previousValue, Grouping< TKey, TSource> element)) → T -
Reduces a collection to a single value by iteratively combining each
element of the collection with an existing value
inherited
-
followedBy(
Iterable< Grouping< other) → Iterable<TKey, TSource> >Grouping< TKey, TSource> > -
Creates the lazy concatenation of this iterable and
other
.inherited -
forEach(
void action(Grouping< TKey, TSource> element)) → void -
Invokes
action
on each element of this iterable in iteration order.inherited -
join(
[String separator = ""]) → String -
Converts each element to a String and concatenates the strings.
inherited
-
lastWhere(
bool test(Grouping< TKey, TSource> element), {Grouping<TKey, TSource> orElse()?}) → Grouping<TKey, TSource> -
The last element that satisfies the given predicate
test
.inherited -
map<
T> (T toElement(Grouping< TKey, TSource> e)) → Iterable<T> -
The current elements of this iterable modified by
toElement
.inherited -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
reduce(
Grouping< TKey, TSource> combine(Grouping<TKey, TSource> value, Grouping<TKey, TSource> element)) → Grouping<TKey, TSource> -
Reduces a collection to a single value by iteratively combining elements
of the collection using the provided function.
inherited
-
singleWhere(
bool test(Grouping< TKey, TSource> element), {Grouping<TKey, TSource> orElse()?}) → Grouping<TKey, TSource> -
The single element that satisfies
test
.inherited -
skip(
int count) → Iterable< Grouping< TKey, TSource> > -
Creates an Iterable that provides all but the first
count
elements.inherited -
skipWhile(
bool test(Grouping< TKey, TSource> value)) → Iterable<Grouping< TKey, TSource> > -
Creates an
Iterable
that skips leading elements whiletest
is satisfied.inherited -
take(
int count) → Iterable< Grouping< TKey, TSource> > -
Creates a lazy iterable of the
count
first elements of this iterable.inherited -
takeWhile(
bool test(Grouping< TKey, TSource> value)) → Iterable<Grouping< TKey, TSource> > -
Creates a lazy iterable of the leading elements satisfying
test
.inherited -
toList(
{bool growable = true}) → List< Grouping< TKey, TSource> > -
Creates a List containing the elements of this Iterable.
inherited
-
toSet(
) → Set< Grouping< TKey, TSource> > -
Creates a Set containing the same elements as this iterable.
inherited
-
toString(
) → String -
Returns a string representation of (some of) the elements of
this
.inherited -
where(
bool test(Grouping< TKey, TSource> element)) → Iterable<Grouping< TKey, TSource> > -
Creates a new lazy Iterable with all elements that satisfy the
predicate
test
.inherited -
whereType<
T> () → Iterable< T> -
Creates a new lazy Iterable with all elements that have type
T
.inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited