Interface UnsortedBag<T>
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- All Superinterfaces:
Bag<T>
,InternalIterable<T>
,java.lang.Iterable<T>
,RichIterable<T>
- All Known Subinterfaces:
ImmutableBag<T>
,MultiReaderBag<T>
,MutableBag<T>
- All Known Implementing Classes:
AbstractHashBag
,AbstractImmutableBag
,AbstractMutableBag
,HashBag
,HashBagWithHashingStrategy
,ImmutableArrayBag
,ImmutableEmptyBag
,ImmutableHashBag
,ImmutableSingletonBag
,MultiReaderHashBag
,MultiReaderHashBag.UntouchableMutableBag
,SynchronizedBag
,UnmodifiableBag
public interface UnsortedBag<T> extends Bag<T>
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Method Summary
All Methods Instance Methods Abstract Methods Default Methods Deprecated Methods Modifier and Type Method Description <V> UnsortedBag<V>
collect(Function<? super T,? extends V> function)
Returns a new collection with the results of applying the specified function on each element of the source collection.BooleanBag
collectBoolean(BooleanFunction<? super T> booleanFunction)
Returns a new primitiveboolean
iterable with the results of applying the specified function on each element of the source collection.ByteBag
collectByte(ByteFunction<? super T> byteFunction)
Returns a new primitivebyte
iterable with the results of applying the specified function on each element of the source collection.CharBag
collectChar(CharFunction<? super T> charFunction)
Returns a new primitivechar
iterable with the results of applying the specified function on each element of the source collection.DoubleBag
collectDouble(DoubleFunction<? super T> doubleFunction)
Returns a new primitivedouble
iterable with the results of applying the specified function on each element of the source collection.FloatBag
collectFloat(FloatFunction<? super T> floatFunction)
Returns a new primitivefloat
iterable with the results of applying the specified function on each element of the source collection.<V> UnsortedBag<V>
collectIf(Predicate<? super T> predicate, Function<? super T,? extends V> function)
Returns a new collection with the results of applying the specified function on each element of the source collection, but only for those elements which return true upon evaluation of the predicate.IntBag
collectInt(IntFunction<? super T> intFunction)
Returns a new primitiveint
iterable with the results of applying the specified function on each element of the source collection.LongBag
collectLong(LongFunction<? super T> longFunction)
Returns a new primitivelong
iterable with the results of applying the specified function on each element of the source collection.ShortBag
collectShort(ShortFunction<? super T> shortFunction)
Returns a new primitiveshort
iterable with the results of applying the specified function on each element of the source collection.<P,V>
UnsortedBag<V>collectWith(Function2<? super T,? super P,? extends V> function, P parameter)
Same asRichIterable.collect(Function)
with aFunction2
and specified parameter which is passed to the block.<V> UnsortedBag<V>
collectWithOccurrences(ObjectIntToObjectFunction<? super T,? extends V> function)
Iterates over the unique elements and their occurrences and collects the results of applying the specified function.<V> UnsortedBag<V>
flatCollect(Function<? super T,? extends java.lang.Iterable<V>> function)
flatCollect
is a special case ofRichIterable.collect(Function)
.default <P,V>
UnsortedBag<V>flatCollectWith(Function2<? super T,? super P,? extends java.lang.Iterable<V>> function, P parameter)
<V> UnsortedBagMultimap<V,T>
groupBy(Function<? super T,? extends V> function)
For each element of the iterable, the function is evaluated and the results of these evaluations are collected into a new multimap, where the transformed value is the key and the original values are added to the same (or similar) species of collection as the source iterable.<V> UnsortedBagMultimap<V,T>
groupByEach(Function<? super T,? extends java.lang.Iterable<V>> function)
Similar toRichIterable.groupBy(Function)
, except the result of evaluating function will return a collection of keys for each value.PartitionUnsortedBag<T>
partition(Predicate<? super T> predicate)
Filters a collection into a PartitionedIterable based on the evaluation of the predicate.UnsortedBag<T>
reject(Predicate<? super T> predicate)
Returns all elements of the source collection that return false when evaluating of the predicate.<P> UnsortedBag<T>
rejectWith(Predicate2<? super T,? super P> predicate, P parameter)
Similar toRichIterable.reject(Predicate)
, except with an evaluation parameter for the second generic argument inPredicate2
.UnsortedBag<T>
select(Predicate<? super T> predicate)
Returns all elements of the source collection that return true when evaluating the predicate.UnsortedBag<T>
selectByOccurrences(IntPredicate predicate)
Returns all elements of the bag that have a number of occurrences that satisfy the predicate.default UnsortedBag<T>
selectDuplicates()
Returns all elements of the bag that have more than one occurrence.<S> UnsortedBag<S>
selectInstancesOf(java.lang.Class<S> clazz)
Returns all elements of the source collection that are instances of the Classclazz
.UnsortedSetIterable<T>
selectUnique()
Returns a set containing all elements of the bag that have exactly one occurrence.<P> UnsortedBag<T>
selectWith(Predicate2<? super T,? super P> predicate, P parameter)
Similar toRichIterable.select(Predicate)
, except with an evaluation parameter for the second generic argument inPredicate2
.UnsortedBag<T>
tap(Procedure<? super T> procedure)
Executes the Procedure for each element in the iterable and returnsthis
.<S> UnsortedBag<Pair<T,S>>
zip(java.lang.Iterable<S> that)
Deprecated.in 6.0.UnsortedSetIterable<Pair<T,java.lang.Integer>>
zipWithIndex()
Deprecated.in 6.0.-
Methods inherited from interface org.eclipse.collections.api.bag.Bag
aggregateBy, allSatisfyWithOccurrences, anySatisfyWithOccurrences, bottomOccurrences, collectWithOccurrences, detectWithOccurrences, distinctView, equals, forEachWithOccurrences, hashCode, noneSatisfyWithOccurrences, occurrencesOf, partitionWith, reduceInPlace, reduceInPlace, sizeDistinct, summarizeDouble, summarizeFloat, summarizeInt, summarizeLong, toImmutable, toMapOfItemToCount, topOccurrences, toStringOfItemToCount
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Methods inherited from interface org.eclipse.collections.api.InternalIterable
forEach, forEachWith, forEachWithIndex
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Methods inherited from interface org.eclipse.collections.api.RichIterable
aggregateBy, aggregateInPlaceBy, allSatisfy, allSatisfyWith, anySatisfy, anySatisfyWith, appendString, appendString, appendString, asLazy, chunk, collect, collectBoolean, collectByte, collectChar, collectDouble, collectFloat, collectIf, collectInt, collectLong, collectShort, collectWith, contains, containsAll, containsAllArguments, containsAllIterable, containsAny, containsAnyIterable, containsBy, containsNone, containsNoneIterable, count, countBy, countBy, countByEach, countByEach, countByWith, countByWith, countWith, detect, detectIfNone, detectOptional, detectWith, detectWithIfNone, detectWithOptional, each, flatCollect, flatCollectBoolean, flatCollectByte, flatCollectChar, flatCollectDouble, flatCollectFloat, flatCollectInt, flatCollectLong, flatCollectShort, flatCollectWith, forEach, getAny, getFirst, getLast, getOnly, groupBy, groupByAndCollect, groupByEach, groupByUniqueKey, groupByUniqueKey, injectInto, injectInto, injectInto, injectInto, injectInto, injectIntoDouble, injectIntoFloat, injectIntoInt, injectIntoLong, into, isEmpty, makeString, makeString, makeString, makeString, max, max, maxBy, maxByOptional, maxOptional, maxOptional, min, min, minBy, minByOptional, minOptional, minOptional, noneSatisfy, noneSatisfyWith, notEmpty, reduce, reject, rejectWith, select, selectWith, size, sumByDouble, sumByFloat, sumByInt, sumByLong, sumOfDouble, sumOfFloat, sumOfInt, sumOfLong, toArray, toArray, toBag, toBiMap, toImmutableBag, toImmutableBiMap, toImmutableList, toImmutableMap, toImmutableSet, toImmutableSortedBag, toImmutableSortedBag, toImmutableSortedBagBy, toImmutableSortedList, toImmutableSortedList, toImmutableSortedListBy, toImmutableSortedSet, toImmutableSortedSet, toImmutableSortedSetBy, toList, toMap, toMap, toSet, toSortedBag, toSortedBag, toSortedBagBy, toSortedList, toSortedList, toSortedListBy, toSortedMap, toSortedMap, toSortedMapBy, toSortedSet, toSortedSet, toSortedSetBy, toString, zip, zipWithIndex
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Method Detail
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tap
UnsortedBag<T> tap(Procedure<? super T> procedure)
Description copied from interface:RichIterable
Executes the Procedure for each element in the iterable and returnsthis
.Example using a Java 8 lambda expression:
RichIterable<Person> tapped = people.tap(person -> LOGGER.info(person.getName()));
Example using an anonymous inner class:
RichIterable<Person> tapped = people.tap(new Procedure<Person>() { public void value(Person person) { LOGGER.info(person.getName()); } });
- Specified by:
tap
in interfaceBag<T>
- Specified by:
tap
in interfaceRichIterable<T>
- See Also:
RichIterable.each(Procedure)
,RichIterable.forEach(Procedure)
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selectByOccurrences
UnsortedBag<T> selectByOccurrences(IntPredicate predicate)
Description copied from interface:Bag
Returns all elements of the bag that have a number of occurrences that satisfy the predicate.- Specified by:
selectByOccurrences
in interfaceBag<T>
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selectDuplicates
default UnsortedBag<T> selectDuplicates()
Description copied from interface:Bag
Returns all elements of the bag that have more than one occurrence.- Specified by:
selectDuplicates
in interfaceBag<T>
- Since:
- 9.2
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selectUnique
UnsortedSetIterable<T> selectUnique()
Description copied from interface:Bag
Returns a set containing all elements of the bag that have exactly one occurrence.- Specified by:
selectUnique
in interfaceBag<T>
- Since:
- 9.2
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select
UnsortedBag<T> select(Predicate<? super T> predicate)
Description copied from interface:RichIterable
Returns all elements of the source collection that return true when evaluating the predicate. This method is also commonly called filter.Example using a Java 8 lambda expression:
RichIterable<Person> selected = people.select(person -> person.getAddress().getCity().equals("London"));
Example using an anonymous inner class:
RichIterable<Person> selected = people.select(new Predicate<Person>() { public boolean accept(Person person) { return person.getAddress().getCity().equals("London"); } });
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selectWith
<P> UnsortedBag<T> selectWith(Predicate2<? super T,? super P> predicate, P parameter)
Description copied from interface:RichIterable
Similar toRichIterable.select(Predicate)
, except with an evaluation parameter for the second generic argument inPredicate2
.E.g. return a
Collection
of Person elements where the person has an age greater than or equal to 18 yearsExample using a Java 8 lambda expression:
RichIterable<Person> selected = people.selectWith((Person person, Integer age) -> person.getAge()>= age, Integer.valueOf(18));
Example using an anonymous inner class:
RichIterable<Person> selected = people.selectWith(new Predicate2<Person, Integer>() { public boolean accept(Person person, Integer age) { return person.getAge()>= age; } }, Integer.valueOf(18));
- Specified by:
selectWith
in interfaceBag<T>
- Specified by:
selectWith
in interfaceRichIterable<T>
- Parameters:
predicate
- aPredicate2
to use as the select criteriaparameter
- a parameter to pass in for evaluation of the second argumentP
inpredicate
- See Also:
RichIterable.select(Predicate)
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reject
UnsortedBag<T> reject(Predicate<? super T> predicate)
Description copied from interface:RichIterable
Returns all elements of the source collection that return false when evaluating of the predicate. This method is also sometimes called filterNot and is the equivalent of calling iterable.select(Predicates.not(predicate)).Example using a Java 8 lambda expression:
RichIterable<Person> rejected = people.reject(person -> person.person.getLastName().equals("Smith"));
Example using an anonymous inner class:
RichIterable<Person> rejected = people.reject(new Predicate<Person>() { public boolean accept(Person person) { return person.person.getLastName().equals("Smith"); } });
- Specified by:
reject
in interfaceBag<T>
- Specified by:
reject
in interfaceRichIterable<T>
- Parameters:
predicate
- aPredicate
to use as the reject criteria- Returns:
- a RichIterable that contains elements that cause
Predicate.accept(Object)
method to evaluate to false
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rejectWith
<P> UnsortedBag<T> rejectWith(Predicate2<? super T,? super P> predicate, P parameter)
Description copied from interface:RichIterable
Similar toRichIterable.reject(Predicate)
, except with an evaluation parameter for the second generic argument inPredicate2
.E.g. return a
Collection
of Person elements where the person has an age greater than or equal to 18 yearsExample using a Java 8 lambda expression:
RichIterable<Person> rejected = people.rejectWith((Person person, Integer age) -> person.getAge() < age, Integer.valueOf(18));
Example using an anonymous inner class:
MutableList<Person> rejected = people.rejectWith(new Predicate2<Person, Integer>() { public boolean accept(Person person, Integer age) { return person.getAge() < age; } }, Integer.valueOf(18));
- Specified by:
rejectWith
in interfaceBag<T>
- Specified by:
rejectWith
in interfaceRichIterable<T>
- Parameters:
predicate
- aPredicate2
to use as the select criteriaparameter
- a parameter to pass in for evaluation of the second argumentP
inpredicate
- See Also:
RichIterable.select(Predicate)
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selectInstancesOf
<S> UnsortedBag<S> selectInstancesOf(java.lang.Class<S> clazz)
Description copied from interface:RichIterable
Returns all elements of the source collection that are instances of the Classclazz
.RichIterable<Integer> integers = List.mutable.with(new Integer(0), new Long(0L), new Double(0.0)).selectInstancesOf(Integer.class);
- Specified by:
selectInstancesOf
in interfaceBag<T>
- Specified by:
selectInstancesOf
in interfaceRichIterable<T>
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partition
PartitionUnsortedBag<T> partition(Predicate<? super T> predicate)
Description copied from interface:RichIterable
Filters a collection into a PartitionedIterable based on the evaluation of the predicate.Example using a Java 8 lambda expression:
PartitionIterable<Person> newYorkersAndNonNewYorkers = people.partition(person -> person.getAddress().getState().getName().equals("New York"));
Example using an anonymous inner class:
PartitionIterable<Person> newYorkersAndNonNewYorkers = people.partition(new Predicate<Person>() { public boolean accept(Person person) { return person.getAddress().getState().getName().equals("New York"); } });
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collect
<V> UnsortedBag<V> collect(Function<? super T,? extends V> function)
Description copied from interface:RichIterable
Returns a new collection with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.Example using a Java 8 lambda expression:
RichIterable<String> names = people.collect(person -> person.getFirstName() + " " + person.getLastName());
Example using an anonymous inner class:
RichIterable<String> names = people.collect(new Function<Person, String>() { public String valueOf(Person person) { return person.getFirstName() + " " + person.getLastName(); } });
- Specified by:
collect
in interfaceRichIterable<T>
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collectBoolean
BooleanBag collectBoolean(BooleanFunction<? super T> booleanFunction)
Description copied from interface:RichIterable
Returns a new primitiveboolean
iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.Example using a Java 8 lambda expression:
BooleanIterable licenses = people.collectBoolean(person -> person.hasDrivingLicense());
Example using an anonymous inner class:
BooleanIterable licenses = people.collectBoolean(new BooleanFunction<Person>() { public boolean booleanValueOf(Person person) { return person.hasDrivingLicense(); } });
- Specified by:
collectBoolean
in interfaceRichIterable<T>
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collectByte
ByteBag collectByte(ByteFunction<? super T> byteFunction)
Description copied from interface:RichIterable
Returns a new primitivebyte
iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.Example using a Java 8 lambda expression:
ByteIterable bytes = people.collectByte(person -> person.getCode());
Example using an anonymous inner class:
ByteIterable bytes = people.collectByte(new ByteFunction<Person>() { public byte byteValueOf(Person person) { return person.getCode(); } });
- Specified by:
collectByte
in interfaceRichIterable<T>
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collectChar
CharBag collectChar(CharFunction<? super T> charFunction)
Description copied from interface:RichIterable
Returns a new primitivechar
iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.Example using a Java 8 lambda expression:
CharIterable chars = people.collectChar(person -> person.getMiddleInitial());
Example using an anonymous inner class:
CharIterable chars = people.collectChar(new CharFunction<Person>() { public char charValueOf(Person person) { return person.getMiddleInitial(); } });
- Specified by:
collectChar
in interfaceRichIterable<T>
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collectDouble
DoubleBag collectDouble(DoubleFunction<? super T> doubleFunction)
Description copied from interface:RichIterable
Returns a new primitivedouble
iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.Example using a Java 8 lambda expression:
DoubleIterable doubles = people.collectDouble(person -> person.getMilesFromNorthPole());
Example using an anonymous inner class:
DoubleIterable doubles = people.collectDouble(new DoubleFunction<Person>() { public double doubleValueOf(Person person) { return person.getMilesFromNorthPole(); } });
- Specified by:
collectDouble
in interfaceRichIterable<T>
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collectFloat
FloatBag collectFloat(FloatFunction<? super T> floatFunction)
Description copied from interface:RichIterable
Returns a new primitivefloat
iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.Example using a Java 8 lambda expression:
FloatIterable floats = people.collectFloat(person -> person.getHeightInInches());
Example using an anonymous inner class:
FloatIterable floats = people.collectFloat(new FloatFunction<Person>() { public float floatValueOf(Person person) { return person.getHeightInInches(); } });
- Specified by:
collectFloat
in interfaceRichIterable<T>
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collectInt
IntBag collectInt(IntFunction<? super T> intFunction)
Description copied from interface:RichIterable
Returns a new primitiveint
iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.Example using a Java 8 lambda expression:
IntIterable ints = people.collectInt(person -> person.getAge());
Example using an anonymous inner class:
IntIterable ints = people.collectInt(new IntFunction<Person>() { public int intValueOf(Person person) { return person.getAge(); } });
- Specified by:
collectInt
in interfaceRichIterable<T>
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collectLong
LongBag collectLong(LongFunction<? super T> longFunction)
Description copied from interface:RichIterable
Returns a new primitivelong
iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.Example using a Java 8 lambda expression:
LongIterable longs = people.collectLong(person -> person.getGuid());
Example using an anonymous inner class:
LongIterable longs = people.collectLong(new LongFunction<Person>() { public long longValueOf(Person person) { return person.getGuid(); } });
- Specified by:
collectLong
in interfaceRichIterable<T>
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collectShort
ShortBag collectShort(ShortFunction<? super T> shortFunction)
Description copied from interface:RichIterable
Returns a new primitiveshort
iterable with the results of applying the specified function on each element of the source collection. This method is also commonly called transform or map.Example using a Java 8 lambda expression:
ShortIterable shorts = people.collectShort(person -> person.getNumberOfJunkMailItemsReceivedPerMonth());
Example using an anonymous inner class:
ShortIterable shorts = people.collectShort(new ShortFunction<Person>() { public short shortValueOf(Person person) { return person.getNumberOfJunkMailItemsReceivedPerMonth(); } });
- Specified by:
collectShort
in interfaceRichIterable<T>
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collectWith
<P,V> UnsortedBag<V> collectWith(Function2<? super T,? super P,? extends V> function, P parameter)
Description copied from interface:RichIterable
Same asRichIterable.collect(Function)
with aFunction2
and specified parameter which is passed to the block.Example using a Java 8 lambda expression:
RichIterable<Integer> integers = Lists.mutable.with(1, 2, 3).collectWith((each, parameter) -> each + parameter, Integer.valueOf(1));
Example using an anonymous inner class:
Function2<Integer, Integer, Integer> addParameterFunction = new Function2<Integer, Integer, Integer>() { public Integer value(Integer each, Integer parameter) { return each + parameter; } }; RichIterable<Integer> integers = Lists.mutable.with(1, 2, 3).collectWith(addParameterFunction, Integer.valueOf(1));
- Specified by:
collectWith
in interfaceRichIterable<T>
- Parameters:
function
- AFunction2
to use as the collect transformation functionparameter
- A parameter to pass in for evaluation of the second argumentP
infunction
- Returns:
- A new
RichIterable
that contains the transformed elements returned byFunction2.value(Object, Object)
- See Also:
RichIterable.collect(Function)
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collectIf
<V> UnsortedBag<V> collectIf(Predicate<? super T> predicate, Function<? super T,? extends V> function)
Description copied from interface:RichIterable
Returns a new collection with the results of applying the specified function on each element of the source collection, but only for those elements which return true upon evaluation of the predicate. This is the optimized equivalent of calling iterable.select(predicate).collect(function).Example using a Java 8 lambda and method reference:
RichIterable<String> strings = Lists.mutable.with(1, 2, 3).collectIf(e -> e != null, Object::toString);
Example using Predicates factory:
RichIterable<String> strings = Lists.mutable.with(1, 2, 3).collectIf(Predicates.notNull(), Functions.getToString());
- Specified by:
collectIf
in interfaceRichIterable<T>
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collectWithOccurrences
<V> UnsortedBag<V> collectWithOccurrences(ObjectIntToObjectFunction<? super T,? extends V> function)
Description copied from interface:Bag
Iterates over the unique elements and their occurrences and collects the results of applying the specified function.- Specified by:
collectWithOccurrences
in interfaceBag<T>
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flatCollect
<V> UnsortedBag<V> flatCollect(Function<? super T,? extends java.lang.Iterable<V>> function)
Description copied from interface:RichIterable
flatCollect
is a special case ofRichIterable.collect(Function)
. Withcollect
, when theFunction
returns a collection, the result is a collection of collections.flatCollect
outputs a single "flattened" collection instead. This method is commonly called flatMap.Consider the following example where we have a
Person
class, and eachPerson
has a list ofAddress
objects. Take the followingFunction
:Function<Person, List<Address>> addressFunction = Person::getAddresses; RichIterable<Person> people = ...;
Usingcollect
returns a collection of collections of addresses.RichIterable<List<Address>> addresses = people.collect(addressFunction);
UsingflatCollect
returns a single flattened list of addresses.RichIterable<Address> addresses = people.flatCollect(addressFunction);
- Specified by:
flatCollect
in interfaceRichIterable<T>
- Parameters:
function
- TheFunction
to apply- Returns:
- a new flattened collection produced by applying the given
function
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flatCollectWith
default <P,V> UnsortedBag<V> flatCollectWith(Function2<? super T,? super P,? extends java.lang.Iterable<V>> function, P parameter)
- Specified by:
flatCollectWith
in interfaceRichIterable<T>
- Since:
- 9.2
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zip
@Deprecated <S> UnsortedBag<Pair<T,S>> zip(java.lang.Iterable<S> that)
Deprecated.in 6.0. UseOrderedIterable.zip(Iterable)
instead.Description copied from interface:RichIterable
Returns aRichIterable
formed from thisRichIterable
and anotherRichIterable
by combining corresponding elements in pairs. If one of the twoRichIterable
s is longer than the other, its remaining elements are ignored.- Specified by:
zip
in interfaceRichIterable<T>
- Type Parameters:
S
- the type of the second half of the returned pairs- Parameters:
that
- TheRichIterable
providing the second half of each result pair- Returns:
- A new
RichIterable
containing pairs consisting of corresponding elements of thisRichIterable
and that. The length of the returnedRichIterable
is the minimum of the lengths of thisRichIterable
and that.
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zipWithIndex
@Deprecated UnsortedSetIterable<Pair<T,java.lang.Integer>> zipWithIndex()
Deprecated.in 6.0. UseOrderedIterable.zipWithIndex()
instead.Description copied from interface:RichIterable
Zips thisRichIterable
with its indices.- Specified by:
zipWithIndex
in interfaceBag<T>
- Specified by:
zipWithIndex
in interfaceRichIterable<T>
- Returns:
- A new
RichIterable
containing pairs consisting of all elements of thisRichIterable
paired with their index. Indices start at 0. - See Also:
RichIterable.zip(Iterable)
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groupBy
<V> UnsortedBagMultimap<V,T> groupBy(Function<? super T,? extends V> function)
Description copied from interface:RichIterable
For each element of the iterable, the function is evaluated and the results of these evaluations are collected into a new multimap, where the transformed value is the key and the original values are added to the same (or similar) species of collection as the source iterable.Example using a Java 8 method reference:
Multimap<String, Person> peopleByLastName = people.groupBy(Person::getLastName);
Example using an anonymous inner class:
Multimap<String, Person> peopleByLastName = people.groupBy(new Function<Person, String>() { public String valueOf(Person person) { return person.getLastName(); } });
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groupByEach
<V> UnsortedBagMultimap<V,T> groupByEach(Function<? super T,? extends java.lang.Iterable<V>> function)
Description copied from interface:RichIterable
Similar toRichIterable.groupBy(Function)
, except the result of evaluating function will return a collection of keys for each value.- Specified by:
groupByEach
in interfaceBag<T>
- Specified by:
groupByEach
in interfaceRichIterable<T>
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