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
- DefaultIfEmptyExtension
- DefaultRangeIfEmptyExtension
- DistinctExtension
- ElementAtOrDefaultExtension
- EndsWithExtension
- ExceptExtension
- ExcludeAtExtension
- ExcludeExtension
- ExcludeRangeExtension
- FillBackwardExtension
- FillForwardExtension
- FillMissingExtension
- FirstOrDefaultExtension
- FirstWhereOrDefaultExtension
- GroupByExtension
- GroupByValueExtension
- GroupJoinExtension
- GroupSelectExtension
- GroupSelectValueExtension
- IndexExtension
- InsertAllExtension
- InsertExtension
- InsertionIterableExtensions
- InsertOrAppendAll
- InsertOrAppendExtension
- InterleaveAllExtension
- InterleaveExtension
- IntersectExtension
- JoinMapExtension
- LagExtension
- LagSelectExtension
- LastOrDefaultExtension
- LastWhereOrDefaultExtension
- LeadExtension
- LeadSelectExtension
- MathConsumerExtensions
- MaxExtension
- MemoizeExtension
- MinExtension
- MoveExtension
- NonNullExtension
- OfTypeExtension
- OrderByDescendingExtension
- OrderByExtension
- OrderedIterableExtensions
- PadEndExtension
- PairwiseExtension
- PartitionExtension
- PermutationsExtension
- PrependAllExtension
- PrependExtension
- PreScanExtension
- RandomSubsetExtension
- RepeatExtension
- ReverseExtension
- ScanExtension
- SelectExtension
- SelectManyExtension
- SequenceEqualsExtension
- SingleOrDefaultExtension
- SingleWhereOrDefaultExtension
- SkipLastExtension
- SplitExtension
- StartsWithExtension
- SubsetsExtension
- SumExtension
- TakeEveryExtension
- TakeLastExtension
- 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> -
Returns the first element. [...]
read-only, inherited
- hashCode → int
-
The hash code for this object. [...]
read-only, inherited
- isEmpty → bool
-
Returns
true
if there are no elements in this collection. [...]read-only, inherited - isNotEmpty → bool
-
Returns true if there is at least one element in this collection. [...]
read-only, inherited
-
iterator
→ Iterator<
Grouping< TKey, TSource> > -
Returns a new
Iterator
that allows iterating the elements of thisIterable
. [...]read-only, override -
keyComparer
→ EqualityComparer<
TKey> -
final
-
keySelector
→ TKey Function(TSource
) -
final
-
last
→ Grouping<
TKey, TSource> -
Returns the last element. [...]
read-only, inherited
- length → int
-
Returns the number of elements in this. [...]
read-only, inherited
- runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
-
single
→ Grouping<
TKey, TSource> -
Checks that this iterable has only one element, and returns that element. [...]
read-only, inherited
-
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> -
Provides a view of this iterable as an iterable of
R
instances. [...]inherited -
contains(
Object element ) → bool -
Returns true if 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> f(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> -
Returns 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< otherTKey, TSource> >) → Iterable< Grouping< TKey, TSource> > -
Returns the lazy concatentation of this iterable and
other
. [...]inherited -
forEach(
void f(Grouping< TKey, TSource> element) ) → void -
Applies the function
f
to each element of this collection 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> -
Returns the last element that satisfies the given predicate
test
. [...]inherited -
map<
T> (T f(Grouping< TKey, TSource> e) ) → Iterable< T> -
Returns a new lazy Iterable with elements that are created by
calling
f
on each element of thisIterable
in iteration order. [...]inherited -
noSuchMethod(
Invocation invocation ) → dynamic -
Invoked when a non-existent 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> -
Returns the single element that satisfies
test
. [...]inherited -
skip(
int count ) → Iterable< Grouping< TKey, TSource> > -
Returns an Iterable that provides all but the first
count
elements. [...]inherited -
skipWhile(
bool test(Grouping< TKey, TSource> value) ) → Iterable< Grouping< TKey, TSource> > -
Returns an
Iterable
that skips leading elements whiletest
is satisfied. [...]inherited -
take(
int count ) → Iterable< Grouping< TKey, TSource> > -
Returns a lazy iterable of the
count
first elements of this iterable. [...]inherited -
takeWhile(
bool test(Grouping< TKey, TSource> value) ) → Iterable< Grouping< TKey, TSource> > -
Returns 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> > -
Returns a new lazy Iterable with all elements that satisfy the
predicate
test
. [...]inherited -
whereType<
T> () → Iterable< T> -
Returns a new lazy Iterable with all elements that have type
T
. [...]inherited
Operators
-
operator ==(
Object other ) → bool -
The equality operator. [...]
inherited