Class AbstractMultiReaderMutableCollection<T>

    • Constructor Detail

      • AbstractMultiReaderMutableCollection

        public AbstractMultiReaderMutableCollection()
    • Method Detail

      • contains

        public boolean contains​(java.lang.Object item)
        Description copied from interface: RichIterable
        Returns true if the iterable has an element which responds true to element.equals(object).
        Specified by:
        contains in interface java.util.Collection<T>
        Specified by:
        contains in interface RichIterable<T>
      • containsAll

        public boolean containsAll​(java.util.Collection<?> collection)
        Description copied from interface: RichIterable
        Returns true if all elements in source are contained in this collection.
        Specified by:
        containsAll in interface java.util.Collection<T>
        Specified by:
        containsAll in interface RichIterable<T>
        See Also:
        Collection.containsAll(Collection)
      • containsAllIterable

        public boolean containsAllIterable​(java.lang.Iterable<?> source)
        Description copied from interface: RichIterable
        Returns true if all elements in source are contained in this collection.
        Specified by:
        containsAllIterable in interface RichIterable<T>
      • containsAllArguments

        public boolean containsAllArguments​(java.lang.Object... elements)
        Description copied from interface: RichIterable
        Returns true if all elements in the specified var arg array are contained in this collection.
        Specified by:
        containsAllArguments in interface RichIterable<T>
      • noneSatisfy

        public boolean noneSatisfy​(Predicate<? super T> predicate)
        Description copied from interface: RichIterable
        Returns true if the predicate evaluates to false for every element of the iterable or if the iterable is empty. Otherwise, returns false.
        Specified by:
        noneSatisfy in interface RichIterable<T>
      • noneSatisfyWith

        public <P> boolean noneSatisfyWith​(Predicate2<? super T,​? super P> predicate,
                                           P parameter)
        Description copied from interface: RichIterable
        Returns true if the predicate evaluates to false for every element of the collection, or return false. Returns true if the collection is empty.
        Specified by:
        noneSatisfyWith in interface RichIterable<T>
      • allSatisfy

        public boolean allSatisfy​(Predicate<? super T> predicate)
        Description copied from interface: RichIterable
        Returns true if the predicate evaluates to true for every element of the iterable or if the iterable is empty. Otherwise, returns false.
        Specified by:
        allSatisfy in interface RichIterable<T>
      • allSatisfyWith

        public <P> boolean allSatisfyWith​(Predicate2<? super T,​? super P> predicate,
                                          P parameter)
        Description copied from interface: RichIterable
        Returns true if the predicate evaluates to true for every element of the collection, or returns false.
        Specified by:
        allSatisfyWith in interface RichIterable<T>
      • anySatisfy

        public boolean anySatisfy​(Predicate<? super T> predicate)
        Description copied from interface: RichIterable
        Returns true if the predicate evaluates to true for any element of the iterable. Returns false if the iterable is empty, or if no element returned true when evaluating the predicate.
        Specified by:
        anySatisfy in interface RichIterable<T>
      • anySatisfyWith

        public <P> boolean anySatisfyWith​(Predicate2<? super T,​? super P> predicate,
                                          P parameter)
        Description copied from interface: RichIterable
        Returns true if the predicate evaluates to true for any element of the collection, or return false. Returns false if the collection is empty.
        Specified by:
        anySatisfyWith in interface RichIterable<T>
      • into

        public <R extends java.util.Collection<T>> R into​(R target)
        Description copied from interface: RichIterable
        Adds all the elements in this iterable to the specific target Collection.
        Specified by:
        into in interface RichIterable<T>
      • toMap

        public <NK,​NV> MutableMap<NK,​NV> toMap​(Function<? super T,​? extends NK> keyFunction,
                                                           Function<? super T,​? extends NV> valueFunction)
        Description copied from interface: RichIterable
        Converts the collection to a MutableMap implementation using the specified key and value functions.
        Specified by:
        toMap in interface RichIterable<T>
      • toSortedMap

        public <NK,​NV> MutableSortedMap<NK,​NV> toSortedMap​(Function<? super T,​? extends NK> keyFunction,
                                                                       Function<? super T,​? extends NV> valueFunction)
        Description copied from interface: RichIterable
        Converts the collection to a MutableSortedMap implementation using the specified key and value functions sorted by the key elements' natural ordering.
        Specified by:
        toSortedMap in interface RichIterable<T>
      • toSortedMap

        public <NK,​NV> MutableSortedMap<NK,​NV> toSortedMap​(java.util.Comparator<? super NK> comparator,
                                                                       Function<? super T,​? extends NK> keyFunction,
                                                                       Function<? super T,​? extends NV> valueFunction)
        Description copied from interface: RichIterable
        Converts the collection to a MutableSortedMap implementation using the specified key and value functions sorted by the given comparator.
        Specified by:
        toSortedMap in interface RichIterable<T>
      • toBiMap

        public <NK,​NV> MutableBiMap<NK,​NV> toBiMap​(Function<? super T,​? extends NK> keyFunction,
                                                               Function<? super T,​? extends NV> valueFunction)
        Description copied from interface: RichIterable
        Converts the collection to a BiMap implementation using the specified key and value functions.
        Specified by:
        toBiMap in interface RichIterable<T>
      • asLazy

        public LazyIterable<T> asLazy()
        Description copied from interface: RichIterable
        Returns a lazy (deferred) iterable, most likely implemented by calling LazyIterate.adapt(this).
        Specified by:
        asLazy in interface RichIterable<T>
      • toSortedBag

        public MutableSortedBag<T> toSortedBag()
        Description copied from interface: RichIterable
        Converts the collection to a MutableSortedBag implementation and sorts it using the natural order of the elements.
        Specified by:
        toSortedBag in interface RichIterable<T>
      • toSortedBag

        public MutableSortedBag<T> toSortedBag​(java.util.Comparator<? super T> comparator)
        Description copied from interface: RichIterable
        Converts the collection to the MutableSortedBag implementation and sorts it using the specified comparator.
        Specified by:
        toSortedBag in interface RichIterable<T>
      • toImmutableSortedBag

        public ImmutableSortedBag<T> toImmutableSortedBag​(java.util.Comparator<? super T> comparator)
        Description copied from interface: RichIterable
        Converts the collection to an ImmutableSortedBag implementation and sorts it using the specified comparator.
        Specified by:
        toImmutableSortedBag in interface RichIterable<T>
      • toImmutableSortedBagBy

        public <V extends java.lang.Comparable<? super V>> ImmutableSortedBag<T> toImmutableSortedBagBy​(Function<? super T,​? extends V> function)
        Description copied from interface: RichIterable
        Converts the collection to an ImmutableSortedBag implementation and sorts it based on the natural order of the attribute returned by function.
        Specified by:
        toImmutableSortedBagBy in interface RichIterable<T>
      • toSortedList

        public MutableList<T> toSortedList()
        Description copied from interface: RichIterable
        Converts the collection to a MutableList implementation and sorts it using the natural order of the elements.
        Specified by:
        toSortedList in interface RichIterable<T>
      • toSortedList

        public MutableList<T> toSortedList​(java.util.Comparator<? super T> comparator)
        Description copied from interface: RichIterable
        Converts the collection to a MutableList implementation and sorts it using the specified comparator.
        Specified by:
        toSortedList in interface RichIterable<T>
      • toImmutableSortedList

        public ImmutableList<T> toImmutableSortedList​(java.util.Comparator<? super T> comparator)
        Description copied from interface: RichIterable
        Converts the collection to an ImmutableList implementation and sorts it using the specified comparator.
        Specified by:
        toImmutableSortedList in interface RichIterable<T>
      • toSortedListBy

        public <V extends java.lang.Comparable<? super V>> MutableList<T> toSortedListBy​(Function<? super T,​? extends V> function)
        Description copied from interface: RichIterable
        Converts the collection to a MutableList implementation and sorts it based on the natural order of the attribute returned by function.
        Specified by:
        toSortedListBy in interface RichIterable<T>
      • toImmutableSortedListBy

        public <V extends java.lang.Comparable<? super V>> ImmutableList<T> toImmutableSortedListBy​(Function<? super T,​? extends V> function)
        Description copied from interface: RichIterable
        Converts the collection to an ImmutableList implementation and sorts it based on the natural order of the attribute returned by function.
        Specified by:
        toImmutableSortedListBy in interface RichIterable<T>
      • toSortedSet

        public MutableSortedSet<T> toSortedSet()
        Description copied from interface: RichIterable
        Converts the collection to a MutableSortedSet implementation and sorts it using the natural order of the elements.
        Specified by:
        toSortedSet in interface RichIterable<T>
      • toSortedSet

        public MutableSortedSet<T> toSortedSet​(java.util.Comparator<? super T> comparator)
        Description copied from interface: RichIterable
        Converts the collection to a MutableSortedSet implementation and sorts it using the specified comparator.
        Specified by:
        toSortedSet in interface RichIterable<T>
      • toImmutableSortedSet

        public ImmutableSortedSet<T> toImmutableSortedSet​(java.util.Comparator<? super T> comparator)
        Description copied from interface: RichIterable
        Converts the collection to an ImmutableSortedSet implementation and sorts it using the specified comparator.
        Specified by:
        toImmutableSortedSet in interface RichIterable<T>
      • toSortedSetBy

        public <V extends java.lang.Comparable<? super V>> MutableSortedSet<T> toSortedSetBy​(Function<? super T,​? extends V> function)
        Description copied from interface: RichIterable
        Converts the collection to a MutableSortedSet implementation and sorts it based on the natural order of the attribute returned by function.
        Specified by:
        toSortedSetBy in interface RichIterable<T>
      • toImmutableSortedSetBy

        public <V extends java.lang.Comparable<? super V>> ImmutableSortedSet<T> toImmutableSortedSetBy​(Function<? super T,​? extends V> function)
        Description copied from interface: RichIterable
        Converts the collection to an ImmutableSortedSet implementation and sorts it based on the natural order of the attribute returned by function.
        Specified by:
        toImmutableSortedSetBy in interface RichIterable<T>
      • count

        public int count​(Predicate<? super T> predicate)
        Description copied from interface: RichIterable
        Return the total number of elements that answer true to the specified predicate.

        Example using a Java 8 lambda expression:

         int count =
             people.count(person -> person.getAddress().getState().getName().equals("New York"));
         

        Example using an anonymous inner class:

         int count =
             people.count(new Predicate<Person>()
             {
                 public boolean accept(Person person)
                 {
                     return person.getAddress().getState().getName().equals("New York");
                 }
             });
         
        Specified by:
        count in interface RichIterable<T>
      • countWith

        public <P> int countWith​(Predicate2<? super T,​? super P> predicate,
                                 P parameter)
        Description copied from interface: RichIterable
        Returns the total number of elements that evaluate to true for the specified predicate.
        e.g.
         return lastNames.countWith(Predicates2.equal(), "Smith");
         
        Specified by:
        countWith in interface RichIterable<T>
      • detect

        public T detect​(Predicate<? super T> predicate)
        Description copied from interface: RichIterable
        Returns the first element of the iterable for which the predicate evaluates to true or null in the case where no element returns true. This method is commonly called find.

        Example using a Java 8 lambda expression:

         Person person =
             people.detect(person -> person.getFirstName().equals("John") && person.getLastName().equals("Smith"));
         

        Example using an anonymous inner class:

         Person person =
             people.detect(new Predicate<Person>()
             {
                 public boolean accept(Person person)
                 {
                     return person.getFirstName().equals("John") && person.getLastName().equals("Smith");
                 }
             });
         
        Specified by:
        detect in interface RichIterable<T>
      • detectWith

        public <P> T detectWith​(Predicate2<? super T,​? super P> predicate,
                                P parameter)
        Description copied from interface: RichIterable
        Returns the first element that evaluates to true for the specified predicate2 and parameter, or null if none evaluate to true.

        Example using a Java 8 lambda expression:

         Person person =
             people.detectWith((person, fullName) -> person.getFullName().equals(fullName), "John Smith");
         

        Example using an anonymous inner class:

         Person person =
             people.detectWith(new Predicate2<Person, String>()
             {
                 public boolean accept(Person person, String fullName)
                 {
                     return person.getFullName().equals(fullName);
                 }
             }, "John Smith");
         
        Specified by:
        detectWith in interface RichIterable<T>
      • detectOptional

        public java.util.Optional<T> detectOptional​(Predicate<? super T> predicate)
        Description copied from interface: RichIterable
        Returns the first element of the iterable for which the predicate evaluates to true as an Optional. This method is commonly called find.

        Example using a Java 8 lambda expression:

         Person person =
             people.detectOptional(person -> person.getFirstName().equals("John") && person.getLastName().equals("Smith"));
         

        Specified by:
        detectOptional in interface RichIterable<T>
      • detectWithOptional

        public <P> java.util.Optional<T> detectWithOptional​(Predicate2<? super T,​? super P> predicate,
                                                            P parameter)
        Description copied from interface: RichIterable
        Returns the first element that evaluates to true for the specified predicate2 and parameter as an Optional.

        Example using a Java 8 lambda expression:

         Optional<Person> person =
             people.detectWithOptional((person, fullName) -> person.getFullName().equals(fullName), "John Smith");
         

        Specified by:
        detectWithOptional in interface RichIterable<T>
      • detectIfNone

        public T detectIfNone​(Predicate<? super T> predicate,
                              Function0<? extends T> function)
        Description copied from interface: RichIterable
        Returns the first element of the iterable for which the predicate evaluates to true. If no element matches the predicate, then returns the value of applying the specified function.
        Specified by:
        detectIfNone in interface RichIterable<T>
      • detectWithIfNone

        public <P> T detectWithIfNone​(Predicate2<? super T,​? super P> predicate,
                                      P parameter,
                                      Function0<? extends T> function)
        Description copied from interface: RichIterable
        Returns the first element of the iterable that evaluates to true for the specified predicate2 and parameter, or returns the value of evaluating the specified function.
        Specified by:
        detectWithIfNone in interface RichIterable<T>
      • min

        public T min​(java.util.Comparator<? super T> comparator)
        Description copied from interface: RichIterable
        Returns the minimum element out of this container based on the comparator.
        Specified by:
        min in interface RichIterable<T>
      • max

        public T max​(java.util.Comparator<? super T> comparator)
        Description copied from interface: RichIterable
        Returns the maximum element out of this container based on the comparator.
        Specified by:
        max in interface RichIterable<T>
      • minOptional

        public java.util.Optional<T> minOptional​(java.util.Comparator<? super T> comparator)
        Description copied from interface: RichIterable
        Returns the minimum element out of this container based on the comparator as an Optional. If the container is empty Optional.empty() is returned.
        Specified by:
        minOptional in interface RichIterable<T>
      • maxOptional

        public java.util.Optional<T> maxOptional​(java.util.Comparator<? super T> comparator)
        Description copied from interface: RichIterable
        Returns the maximum element out of this container based on the comparator as an Optional. If the container is empty Optional.empty() is returned.
        Specified by:
        maxOptional in interface RichIterable<T>
      • min

        public T min()
        Description copied from interface: RichIterable
        Returns the minimum element out of this container based on the natural order.
        Specified by:
        min in interface RichIterable<T>
      • max

        public T max()
        Description copied from interface: RichIterable
        Returns the maximum element out of this container based on the natural order.
        Specified by:
        max in interface RichIterable<T>
      • minOptional

        public java.util.Optional<T> minOptional()
        Description copied from interface: RichIterable
        Returns the minimum element out of this container based on the natural order as an Optional. If the container is empty Optional.empty() is returned.
        Specified by:
        minOptional in interface RichIterable<T>
      • maxOptional

        public java.util.Optional<T> maxOptional()
        Description copied from interface: RichIterable
        Returns the maximum element out of this container based on the natural order as an Optional. If the container is empty Optional.empty() is returned.
        Specified by:
        maxOptional in interface RichIterable<T>
      • minBy

        public <V extends java.lang.Comparable<? super V>> T minBy​(Function<? super T,​? extends V> function)
        Description copied from interface: RichIterable
        Returns the minimum elements out of this container based on the natural order of the attribute returned by Function.
        Specified by:
        minBy in interface RichIterable<T>
      • maxBy

        public <V extends java.lang.Comparable<? super V>> T maxBy​(Function<? super T,​? extends V> function)
        Description copied from interface: RichIterable
        Returns the maximum elements out of this container based on the natural order of the attribute returned by Function.
        Specified by:
        maxBy in interface RichIterable<T>
      • minByOptional

        public <V extends java.lang.Comparable<? super V>> java.util.Optional<T> minByOptional​(Function<? super T,​? extends V> function)
        Description copied from interface: RichIterable
        Returns the minimum elements out of this container based on the natural order of the attribute returned by Function as an Optional. If the container is empty Optional.empty() is returned.
        Specified by:
        minByOptional in interface RichIterable<T>
      • maxByOptional

        public <V extends java.lang.Comparable<? super V>> java.util.Optional<T> maxByOptional​(Function<? super T,​? extends V> function)
        Description copied from interface: RichIterable
        Returns the maximum elements out of this container based on the natural order of the attribute returned by Function as an Optional. If the container is empty Optional.empty() is returned.
        Specified by:
        maxByOptional in interface RichIterable<T>
      • getFirst

        public T getFirst()
        Description copied from interface: RichIterable
        Returns the first element of an iterable. In the case of a List it is the element at the first index. In the case of any other Collection, it is the first element that would be returned during an iteration. If the iterable is empty, null is returned. If null is a valid element of the container, then a developer would need to check to see if the iterable is empty to validate that a null result was not due to the container being empty.

        The order of Sets are not guaranteed (except for TreeSets and other Ordered Set implementations), so if you use this method, the first element could be any element from the Set.

        Specified by:
        getFirst in interface RichIterable<T>
      • getLast

        public T getLast()
        Description copied from interface: RichIterable
        Returns the last element of an iterable. In the case of a List it is the element at the last index. In the case of any other Collection, it is the last element that would be returned during an iteration. If the iterable is empty, null is returned. If null is a valid element of the container, then a developer would need to check to see if the iterable is empty to validate that a null result was not due to the container being empty.

        The order of Sets are not guaranteed (except for TreeSets and other Ordered Set implementations), so if you use this method, the last element could be any element from the Set.

        Specified by:
        getLast in interface RichIterable<T>
      • getOnly

        public T getOnly()
        Description copied from interface: RichIterable
        Returns the element if the iterable has exactly one element. Otherwise, throw IllegalStateException.
        Specified by:
        getOnly in interface RichIterable<T>
        Returns:
        an element of an iterable.
      • notEmpty

        public boolean notEmpty()
        Description copied from interface: RichIterable
        The English equivalent of !this.isEmpty()
        Specified by:
        notEmpty in interface RichIterable<T>
      • selectAndRejectWith

        public <P> Twin<MutableList<T>> selectAndRejectWith​(Predicate2<? super T,​? super P> predicate,
                                                            P parameter)
        Description copied from interface: MutableCollection
        Filters a collection into two separate collections based on a predicate returned via a Pair.
        e.g.
         return lastNames.selectAndRejectWith(Predicates2.lessThan(), "Mason");
         
        Specified by:
        selectAndRejectWith in interface MutableCollection<T>
      • collect

        public <V,​R extends java.util.Collection<V>> R collect​(Function<? super T,​? extends V> function,
                                                                     R target)
        Description copied from interface: RichIterable
        Same as RichIterable.collect(Function), except that the results are gathered into the specified target collection.

        Example using a Java 8 lambda expression:

         MutableList<String> names =
             people.collect(person -> person.getFirstName() + " " + person.getLastName(), Lists.mutable.empty());
         

        Example using an anonymous inner class:

         MutableList<String> names =
             people.collect(new Function<Person, String>()
             {
                 public String valueOf(Person person)
                 {
                     return person.getFirstName() + " " + person.getLastName();
                 }
             }, Lists.mutable.empty());
         
        Specified by:
        collect in interface RichIterable<T>
        Parameters:
        function - a Function to use as the collect transformation function
        target - the Collection to append to for all elements in this RichIterable that meet select criteria function
        Returns:
        target, which contains appended elements as a result of the collect transformation
        See Also:
        RichIterable.collect(Function)
      • collectBoolean

        public <R extends MutableBooleanCollection> R collectBoolean​(BooleanFunction<? super T> booleanFunction,
                                                                     R target)
        Description copied from interface: RichIterable
        Same as RichIterable.collectBoolean(BooleanFunction), except that the results are gathered into the specified target collection.

        Example using a Java 8 lambda expression:

         BooleanArrayList licenses =
             people.collectBoolean(person -> person.hasDrivingLicense(), new BooleanArrayList());
         

        Example using an anonymous inner class:

         BooleanArrayList licenses =
             people.collectBoolean(new BooleanFunction<Person>()
             {
                 public boolean booleanValueOf(Person person)
                 {
                     return person.hasDrivingLicense();
                 }
             }, new BooleanArrayList());
         
        Specified by:
        collectBoolean in interface RichIterable<T>
        Parameters:
        booleanFunction - a BooleanFunction to use as the collect transformation function
        target - the MutableBooleanCollection to append to for all elements in this RichIterable
        Returns:
        target, which contains appended elements as a result of the collect transformation
      • collectByte

        public <R extends MutableByteCollection> R collectByte​(ByteFunction<? super T> byteFunction,
                                                               R target)
        Description copied from interface: RichIterable
        Same as RichIterable.collectByte(ByteFunction), except that the results are gathered into the specified target collection.

        Example using a Java 8 lambda expression:

         ByteArrayList bytes =
             people.collectByte(person -> person.getCode(), new ByteArrayList());
         

        Example using an anonymous inner class:

         ByteArrayList bytes =
             people.collectByte(new ByteFunction<Person>()
             {
                 public byte byteValueOf(Person person)
                 {
                     return person.getCode();
                 }
             }, new ByteArrayList());
         
        Specified by:
        collectByte in interface RichIterable<T>
        Parameters:
        byteFunction - a ByteFunction to use as the collect transformation function
        target - the MutableByteCollection to append to for all elements in this RichIterable
        Returns:
        target, which contains appended elements as a result of the collect transformation
      • collectChar

        public <R extends MutableCharCollection> R collectChar​(CharFunction<? super T> charFunction,
                                                               R target)
        Description copied from interface: RichIterable
        Same as RichIterable.collectChar(CharFunction), except that the results are gathered into the specified target collection.

        Example using a Java 8 lambda expression:

         CharArrayList chars =
             people.collectChar(person -> person.getMiddleInitial(), new CharArrayList());
         

        Example using an anonymous inner class:

         CharArrayList chars =
             people.collectChar(new CharFunction<Person>()
             {
                 public char charValueOf(Person person)
                 {
                     return person.getMiddleInitial();
                 }
             }, new CharArrayList());
         
        Specified by:
        collectChar in interface RichIterable<T>
        Parameters:
        charFunction - a CharFunction to use as the collect transformation function
        target - the MutableCharCollection to append to for all elements in this RichIterable
        Returns:
        target, which contains appended elements as a result of the collect transformation
      • collectDouble

        public <R extends MutableDoubleCollection> R collectDouble​(DoubleFunction<? super T> doubleFunction,
                                                                   R target)
        Description copied from interface: RichIterable
        Same as RichIterable.collectDouble(DoubleFunction), except that the results are gathered into the specified target collection.

        Example using a Java 8 lambda expression:

         DoubleArrayList doubles =
             people.collectDouble(person -> person.getMilesFromNorthPole(), new DoubleArrayList());
         

        Example using an anonymous inner class:

         DoubleArrayList doubles =
             people.collectDouble(new DoubleFunction<Person>()
             {
                 public double doubleValueOf(Person person)
                 {
                     return person.getMilesFromNorthPole();
                 }
             }, new DoubleArrayList());
         
        Specified by:
        collectDouble in interface RichIterable<T>
        Parameters:
        doubleFunction - a DoubleFunction to use as the collect transformation function
        target - the MutableDoubleCollection to append to for all elements in this RichIterable
        Returns:
        target, which contains appended elements as a result of the collect transformation
      • collectFloat

        public <R extends MutableFloatCollection> R collectFloat​(FloatFunction<? super T> floatFunction,
                                                                 R target)
        Description copied from interface: RichIterable
        Same as RichIterable.collectFloat(FloatFunction), except that the results are gathered into the specified target collection.

        Example using a Java 8 lambda expression:

         FloatArrayList floats =
             people.collectFloat(person -> person.getHeightInInches(), new FloatArrayList());
         

        Example using an anonymous inner class:

         FloatArrayList floats =
             people.collectFloat(new FloatFunction<Person>()
             {
                 public float floatValueOf(Person person)
                 {
                     return person.getHeightInInches();
                 }
             }, new FloatArrayList());
         
        Specified by:
        collectFloat in interface RichIterable<T>
        Parameters:
        floatFunction - a FloatFunction to use as the collect transformation function
        target - the MutableFloatCollection to append to for all elements in this RichIterable
        Returns:
        target, which contains appended elements as a result of the collect transformation
      • collectInt

        public <R extends MutableIntCollection> R collectInt​(IntFunction<? super T> intFunction,
                                                             R target)
        Description copied from interface: RichIterable
        Same as RichIterable.collectInt(IntFunction), except that the results are gathered into the specified target collection.

        Example using a Java 8 lambda expression:

         IntArrayList ints =
             people.collectInt(person -> person.getAge(), new IntArrayList());
         

        Example using an anonymous inner class:

         IntArrayList ints =
             people.collectInt(new IntFunction<Person>()
             {
                 public int intValueOf(Person person)
                 {
                     return person.getAge();
                 }
             }, new IntArrayList());
         
        Specified by:
        collectInt in interface RichIterable<T>
        Parameters:
        intFunction - a IntFunction to use as the collect transformation function
        target - the MutableIntCollection to append to for all elements in this RichIterable
        Returns:
        target, which contains appended elements as a result of the collect transformation
      • collectLong

        public <R extends MutableLongCollection> R collectLong​(LongFunction<? super T> longFunction,
                                                               R target)
        Description copied from interface: RichIterable
        Same as RichIterable.collectLong(LongFunction), except that the results are gathered into the specified target collection.

        Example using a Java 8 lambda expression:

         LongArrayList longs =
             people.collectLong(person -> person.getGuid(), new LongArrayList());
         

        Example using an anonymous inner class:

         LongArrayList longs =
             people.collectLong(new LongFunction<Person>()
             {
                 public long longValueOf(Person person)
                 {
                     return person.getGuid();
                 }
             }, new LongArrayList());
         
        Specified by:
        collectLong in interface RichIterable<T>
        Parameters:
        longFunction - a LongFunction to use as the collect transformation function
        target - the MutableLongCollection to append to for all elements in this RichIterable
        Returns:
        target, which contains appended elements as a result of the collect transformation
      • collectShort

        public <R extends MutableShortCollection> R collectShort​(ShortFunction<? super T> shortFunction,
                                                                 R target)
        Description copied from interface: RichIterable
        Same as RichIterable.collectShort(ShortFunction), except that the results are gathered into the specified target collection.

        Example using a Java 8 lambda expression:

         ShortArrayList shorts =
             people.collectShort(person -> person.getNumberOfJunkMailItemsReceivedPerMonth, new ShortArrayList());
         

        Example using an anonymous inner class:

         ShortArrayList shorts =
             people.collectShort(new ShortFunction<Person>()
             {
                 public short shortValueOf(Person person)
                 {
                     return person.getNumberOfJunkMailItemsReceivedPerMonth;
                 }
             }, new ShortArrayList());
         
        Specified by:
        collectShort in interface RichIterable<T>
        Parameters:
        shortFunction - a ShortFunction to use as the collect transformation function
        target - the MutableShortCollection to append to for all elements in this RichIterable
        Returns:
        target, which contains appended elements as a result of the collect transformation
      • flatCollect

        public <V,​R extends java.util.Collection<V>> R flatCollect​(Function<? super T,​? extends java.lang.Iterable<V>> function,
                                                                         R target)
        Description copied from interface: RichIterable
        Same as flatCollect, only the results are collected into the target collection.
        Specified by:
        flatCollect in interface RichIterable<T>
        Parameters:
        function - The Function to apply
        target - The collection into which results should be added.
        Returns:
        target, which will contain a flattened collection of results produced by applying the given function
        See Also:
        RichIterable.flatCollect(Function)
      • collectIf

        public <V,​R extends java.util.Collection<V>> R collectIf​(Predicate<? super T> predicate,
                                                                       Function<? super T,​? extends V> function,
                                                                       R target)
        Description copied from interface: RichIterable
        Same as the collectIf method with two parameters but uses the specified target collection for the results.
        Specified by:
        collectIf in interface RichIterable<T>
        Parameters:
        predicate - a Predicate to use as the select criteria
        function - a Function to use as the collect transformation function
        target - the Collection to append to for all elements in this RichIterable that meet the collect criteria predicate
        Returns:
        targetCollection, which contains appended elements as a result of the collect criteria and transformation
        See Also:
        RichIterable.collectIf(Predicate, Function)
      • collectWith

        public <P,​V,​R extends java.util.Collection<V>> R collectWith​(Function2<? super T,​? super P,​? extends V> function,
                                                                                 P parameter,
                                                                                 R targetCollection)
        Description copied from interface: RichIterable
        Same as collectWith but with a targetCollection parameter to gather the results.

        Example using a Java 8 lambda expression:

         MutableSet<Integer> integers =
             Lists.mutable.with(1, 2, 3).collectWith((each, parameter) -> each + parameter, Integer.valueOf(1), Sets.mutable.empty());
         

        Example using an anonymous inner class:

         Function2<Integer, Integer, Integer> addParameterFunction =
             new Function2<Integer, Integer, Integer>()
             {
                 public Integer value(final Integer each, final Integer parameter)
                 {
                     return each + parameter;
                 }
             };
         MutableSet<Integer> integers =
             Lists.mutable.with(1, 2, 3).collectWith(addParameterFunction, Integer.valueOf(1), Sets.mutable.empty());
         
        Specified by:
        collectWith in interface RichIterable<T>
        Parameters:
        function - a Function2 to use as the collect transformation function
        parameter - a parameter to pass in for evaluation of the second argument P in function
        targetCollection - the Collection to append to for all elements in this RichIterable that meet select criteria function
        Returns:
        targetCollection, which contains appended elements as a result of the collect transformation
      • selectWith

        public <P,​R extends java.util.Collection<T>> R selectWith​(Predicate2<? super T,​? super P> predicate,
                                                                        P parameter,
                                                                        R targetCollection)
        Description copied from interface: RichIterable
        Similar to RichIterable.select(Predicate, Collection), except with an evaluation parameter for the second generic argument in Predicate2.

        E.g. return a Collection of Person elements where the person has an age greater than or equal to 18 years

        Example using a Java 8 lambda expression:

         MutableList<Person> selected =
             people.selectWith((Person person, Integer age) -> person.getAge()>= age, Integer.valueOf(18), Lists.mutable.empty());
         

        Example using an anonymous inner class:

         MutableList<Person> selected =
             people.selectWith(new Predicate2<Person, Integer>()
             {
                 public boolean accept(Person person, Integer age)
                 {
                     return person.getAge()>= age;
                 }
             }, Integer.valueOf(18), Lists.mutable.empty());
         
        Specified by:
        selectWith in interface RichIterable<T>
        Parameters:
        predicate - a Predicate2 to use as the select criteria
        parameter - a parameter to pass in for evaluation of the second argument P in predicate
        targetCollection - the Collection to append to for all elements in this RichIterable that meet select criteria predicate
        Returns:
        targetCollection, which contains appended elements as a result of the select criteria
        See Also:
        RichIterable.select(Predicate), RichIterable.select(Predicate, Collection)
      • reject

        public <R extends java.util.Collection<T>> R reject​(Predicate<? super T> predicate,
                                                            R target)
        Description copied from interface: RichIterable
        Same as the reject method with one parameter but uses the specified target collection for the results.

        Example using a Java 8 lambda expression:

         MutableList<Person> rejected =
             people.reject(person -> person.person.getLastName().equals("Smith"), Lists.mutable.empty());
         

        Example using an anonymous inner class:

         MutableList<Person> rejected =
             people.reject(new Predicate<Person>()
             {
                 public boolean accept(Person person)
                 {
                     return person.person.getLastName().equals("Smith");
                 }
             }, Lists.mutable.empty());
         
        Specified by:
        reject in interface RichIterable<T>
        Parameters:
        predicate - a Predicate to use as the reject criteria
        target - the Collection to append to for all elements in this RichIterable that cause Predicate#accept(Object) method to evaluate to false
        Returns:
        target, which contains appended elements as a result of the reject criteria
      • rejectWith

        public <P,​R extends java.util.Collection<T>> R rejectWith​(Predicate2<? super T,​? super P> predicate,
                                                                        P parameter,
                                                                        R targetCollection)
        Description copied from interface: RichIterable
        Similar to RichIterable.reject(Predicate, Collection), except with an evaluation parameter for the second generic argument in Predicate2.

        E.g. return a Collection of Person elements where the person has an age greater than or equal to 18 years

        Example using a Java 8 lambda expression:

         MutableList<Person> rejected =
             people.rejectWith((Person person, Integer age) -> person.getAge() < age, Integer.valueOf(18), Lists.mutable.empty());
         

        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), Lists.mutable.empty());
         
        Specified by:
        rejectWith in interface RichIterable<T>
        Parameters:
        predicate - a Predicate2 to use as the reject criteria
        parameter - a parameter to pass in for evaluation of the second argument P in predicate
        targetCollection - the Collection to append to for all elements in this RichIterable that cause Predicate#accept(Object) method to evaluate to false
        Returns:
        targetCollection, which contains appended elements as a result of the reject criteria
        See Also:
        RichIterable.reject(Predicate), RichIterable.reject(Predicate, Collection)
      • select

        public <R extends java.util.Collection<T>> R select​(Predicate<? super T> predicate,
                                                            R target)
        Description copied from interface: RichIterable
        Same as the select method with one parameter but uses the specified target collection for the results.

        Example using a Java 8 lambda expression:

         MutableList<Person> selected =
             people.select(person -> person.person.getLastName().equals("Smith"), Lists.mutable.empty());
         

        Example using an anonymous inner class:

         MutableList<Person> selected =
             people.select(new Predicate<Person>()
             {
                 public boolean accept(Person person)
                 {
                     return person.person.getLastName().equals("Smith");
                 }
             }, Lists.mutable.empty());
         

        Specified by:
        select in interface RichIterable<T>
        Parameters:
        predicate - a Predicate to use as the select criteria
        target - the Collection to append to for all elements in this RichIterable that meet select criteria predicate
        Returns:
        target, which contains appended elements as a result of the select criteria
        See Also:
        RichIterable.select(Predicate)
      • injectInto

        public <IV> IV injectInto​(IV injectedValue,
                                  Function2<? super IV,​? super T,​? extends IV> function)
        Description copied from interface: RichIterable
        Returns the final result of evaluating function using each element of the iterable and the previous evaluation result as the parameters. The injected value is used for the first parameter of the first evaluation, and the current item in the iterable is used as the second parameter. This method is commonly called fold or sometimes reduce.
        Specified by:
        injectInto in interface RichIterable<T>
      • injectInto

        public int injectInto​(int injectedValue,
                              IntObjectToIntFunction<? super T> function)
        Description copied from interface: RichIterable
        Returns the final int result of evaluating function using each element of the iterable and the previous evaluation result as the parameters. The injected value is used for the first parameter of the first evaluation, and the current item in the iterable is used as the second parameter.
        Specified by:
        injectInto in interface RichIterable<T>
      • injectInto

        public long injectInto​(long injectedValue,
                               LongObjectToLongFunction<? super T> function)
        Description copied from interface: RichIterable
        Returns the final long result of evaluating function using each element of the iterable and the previous evaluation result as the parameters. The injected value is used for the first parameter of the first evaluation, and the current item in the iterable is used as the second parameter.
        Specified by:
        injectInto in interface RichIterable<T>
      • injectInto

        public double injectInto​(double injectedValue,
                                 DoubleObjectToDoubleFunction<? super T> function)
        Description copied from interface: RichIterable
        Returns the final double result of evaluating function using each element of the iterable and the previous evaluation result as the parameters. The injected value is used for the first parameter of the first evaluation, and the current item in the iterable is used as the second parameter.
        Specified by:
        injectInto in interface RichIterable<T>
      • injectInto

        public float injectInto​(float injectedValue,
                                FloatObjectToFloatFunction<? super T> function)
        Description copied from interface: RichIterable
        Returns the final float result of evaluating function using each element of the iterable and the previous evaluation result as the parameters. The injected value is used for the first parameter of the first evaluation, and the current item in the iterable is used as the second parameter.
        Specified by:
        injectInto in interface RichIterable<T>
      • sumOfInt

        public long sumOfInt​(IntFunction<? super T> function)
        Description copied from interface: RichIterable
        Returns the final long result of evaluating function for each element of the iterable and adding the results together.
        Specified by:
        sumOfInt in interface RichIterable<T>
      • sumOfFloat

        public double sumOfFloat​(FloatFunction<? super T> function)
        Description copied from interface: RichIterable
        Returns the final double result of evaluating function for each element of the iterable and adding the results together. It uses Kahan summation algorithm to reduce numerical error.
        Specified by:
        sumOfFloat in interface RichIterable<T>
      • sumOfLong

        public long sumOfLong​(LongFunction<? super T> function)
        Description copied from interface: RichIterable
        Returns the final long result of evaluating function for each element of the iterable and adding the results together.
        Specified by:
        sumOfLong in interface RichIterable<T>
      • sumOfDouble

        public double sumOfDouble​(DoubleFunction<? super T> function)
        Description copied from interface: RichIterable
        Returns the final double result of evaluating function for each element of the iterable and adding the results together. It uses Kahan summation algorithm to reduce numerical error.
        Specified by:
        sumOfDouble in interface RichIterable<T>
      • injectIntoWith

        public <IV,​P> IV injectIntoWith​(IV injectValue,
                                              Function3<? super IV,​? super T,​? super P,​? extends IV> function,
                                              P parameter)
        Description copied from interface: MutableCollection
        Returns the final result of evaluating function using each element of the iterable, the previous evaluation result and the parameters. The injected value is used for the first parameter of the first evaluation, and the current item in the iterable is used as the second parameter. The parameter value is always used as the third parameter to the function call.
        Specified by:
        injectIntoWith in interface MutableCollection<T>
        See Also:
        RichIterable.injectInto(Object, Function2)
      • removeIf

        public boolean removeIf​(Predicate<? super T> predicate)
        Description copied from interface: MutableCollection
        Removes all elements in the collection that evaluate to true for the specified predicate.
        e.g.
         return lastNames.removeIf(Predicates.isNull());
         
        Specified by:
        removeIf in interface MutableCollection<T>
      • removeIfWith

        public <P> boolean removeIfWith​(Predicate2<? super T,​? super P> predicate,
                                        P parameter)
        Description copied from interface: MutableCollection
        Removes all elements in the collection that evaluate to true for the specified predicate2 and parameter.
         return lastNames.removeIfWith(Predicates2.isNull(), null);
         
        Specified by:
        removeIfWith in interface MutableCollection<T>
      • add

        public boolean add​(T item)
        Specified by:
        add in interface java.util.Collection<T>
      • addAll

        public boolean addAll​(java.util.Collection<? extends T> collection)
        Specified by:
        addAll in interface java.util.Collection<T>
      • addAllIterable

        public boolean addAllIterable​(java.lang.Iterable<? extends T> iterable)
        Specified by:
        addAllIterable in interface MutableCollection<T>
        See Also:
        Collection.addAll(Collection)
      • clear

        public void clear()
        Specified by:
        clear in interface java.util.Collection<T>
      • isEmpty

        public boolean isEmpty()
        Description copied from interface: RichIterable
        Returns true if this iterable has zero items.
        Specified by:
        isEmpty in interface java.util.Collection<T>
        Specified by:
        isEmpty in interface RichIterable<T>
      • iterator

        public java.util.Iterator<T> iterator()
        This method is not supported directly on MultiReader collections because it is not thread-safe. If you would like to use an iterator with a MultiReader collection, then you must do the following:
         multiReaderList.withReadLockAndDelegate(MutableList<Person> ->
             {
                 Iterator it = people.iterator();
                 ....
             });
         
         final Collection jdkSet = new HashSet();
         final boolean containsAll = new boolean[1];
         multiReaderList.withReadLockAndDelegate(MutableList<Person> people ->
             {
                 set.addAll(people); // addAll uses iterator() in AbstractCollection
                 containsAll[0] = set.containsAll(people); // containsAll uses iterator() in AbstractCollection
             });
         
        Specified by:
        iterator in interface java.util.Collection<T>
        Specified by:
        iterator in interface java.lang.Iterable<T>
      • spliterator

        public java.util.Spliterator<T> spliterator()
        This method is not supported directly on MultiReader collections because it is not thread-safe. If you would like to use a spliterator with a MultiReader collection, then you must protect the calls by calling either withReadLockAndDelegate or withWriteLockAndDelegate.
        Specified by:
        spliterator in interface java.util.Collection<T>
        Specified by:
        spliterator in interface java.lang.Iterable<T>
      • stream

        public java.util.stream.Stream<T> stream()
        This method is not supported directly on MultiReader collections because it is not thread-safe. If you would like to use stream with a MultiReader collection, then you must protect the calls by calling either withReadLockAndDelegate or withWriteLockAndDelegate.
        Specified by:
        stream in interface java.util.Collection<T>
      • parallelStream

        public java.util.stream.Stream<T> parallelStream()
        This method is not supported directly on MultiReader collections because it is not thread-safe. If you would like to use parallelStream with a MultiReader collection, then you must protect the calls by calling either withReadLockAndDelegate or withWriteLockAndDelegate.
        Specified by:
        parallelStream in interface java.util.Collection<T>
      • remove

        public boolean remove​(java.lang.Object item)
        Specified by:
        remove in interface java.util.Collection<T>
      • removeAll

        public boolean removeAll​(java.util.Collection<?> collection)
        Specified by:
        removeAll in interface java.util.Collection<T>
      • removeAllIterable

        public boolean removeAllIterable​(java.lang.Iterable<?> iterable)
        Specified by:
        removeAllIterable in interface MutableCollection<T>
        See Also:
        Collection.removeAll(Collection)
      • retainAll

        public boolean retainAll​(java.util.Collection<?> collection)
        Specified by:
        retainAll in interface java.util.Collection<T>
      • retainAllIterable

        public boolean retainAllIterable​(java.lang.Iterable<?> iterable)
        Specified by:
        retainAllIterable in interface MutableCollection<T>
        See Also:
        Collection.retainAll(Collection)
      • size

        public int size()
        Description copied from interface: RichIterable
        Returns the number of items in this iterable.
        Specified by:
        size in interface java.util.Collection<T>
        Specified by:
        size in interface RichIterable<T>
      • toArray

        public java.lang.Object[] toArray()
        Description copied from interface: RichIterable
        Converts this iterable to an array.
        Specified by:
        toArray in interface java.util.Collection<T>
        Specified by:
        toArray in interface RichIterable<T>
        See Also:
        Collection.toArray()
      • toArray

        public <E> E[] toArray​(E[] a)
        Description copied from interface: RichIterable
        Converts this iterable to an array using the specified target array, assuming the target array is as long or longer than the iterable.
        Specified by:
        toArray in interface java.util.Collection<T>
        Specified by:
        toArray in interface RichIterable<T>
        See Also:
        Collection.toArray(Object[])
      • each

        public void each​(Procedure<? super T> procedure)
        Description copied from interface: RichIterable
        The procedure is executed for each element in the iterable.

        Example using a Java 8 lambda expression:

         people.each(person -> LOGGER.info(person.getName()));
         

        Example using an anonymous inner class:

         people.each(new Procedure<Person>()
         {
             public void value(Person person)
             {
                 LOGGER.info(person.getName());
             }
         });
         
        This method is a variant of InternalIterable.forEach(Procedure) that has a signature conflict with Iterable.forEach(java.util.function.Consumer).
        Specified by:
        each in interface RichIterable<T>
        See Also:
        InternalIterable.forEach(Procedure), Iterable.forEach(java.util.function.Consumer)
      • forEachWith

        public <P> void forEachWith​(Procedure2<? super T,​? super P> procedure,
                                    P parameter)
        Description copied from interface: InternalIterable
        The procedure2 is evaluated for each element in the iterable with the specified parameter provided as the second argument.

        Example using a Java 8 lambda:

         people.forEachWith((Person person, Person other) ->
             {
                 if (person.isRelatedTo(other))
                 {
                      LOGGER.info(person.getName());
                 }
             }, fred);
         

        Example using an anonymous inner class:

         people.forEachWith(new Procedure2<Person, Person>()
         {
             public void value(Person person, Person other)
             {
                 if (person.isRelatedTo(other))
                 {
                      LOGGER.info(person.getName());
                 }
             }
         }, fred);
         
        Specified by:
        forEachWith in interface InternalIterable<T>
      • forEachWithIndex

        public void forEachWithIndex​(ObjectIntProcedure<? super T> objectIntProcedure)
        Description copied from interface: InternalIterable
        Iterates over the iterable passing each element and the current relative int index to the specified instance of ObjectIntProcedure.

        Example using a Java 8 lambda:

         people.forEachWithIndex((Person person, int index) -> LOGGER.info("Index: " + index + " person: " + person.getName()));
         

        Example using an anonymous inner class:

         people.forEachWithIndex(new ObjectIntProcedure<Person>()
         {
             public void value(Person person, int index)
             {
                 LOGGER.info("Index: " + index + " person: " + person.getName());
             }
         });
         
        Specified by:
        forEachWithIndex in interface InternalIterable<T>
      • toString

        public java.lang.String toString()
        Description copied from interface: RichIterable
        Returns a string with the elements of this iterable separated by commas with spaces and enclosed in square brackets.
         Assert.assertEquals("[]", Lists.mutable.empty().toString());
         Assert.assertEquals("[1]", Lists.mutable.with(1).toString());
         Assert.assertEquals("[1, 2, 3]", Lists.mutable.with(1, 2, 3).toString());
         
        Specified by:
        toString in interface RichIterable<T>
        Overrides:
        toString in class java.lang.Object
        Returns:
        a string representation of this RichIterable
        See Also:
        AbstractCollection.toString()
      • makeString

        public java.lang.String makeString()
        Description copied from interface: RichIterable
        Returns a string representation of this collection by delegating to RichIterable.makeString(String) and defaulting the separator parameter to the characters ", " (comma and space).
        Specified by:
        makeString in interface RichIterable<T>
        Returns:
        a string representation of this collection.
      • makeString

        public java.lang.String makeString​(java.lang.String separator)
        Description copied from interface: RichIterable
        Returns a string representation of this collection by delegating to RichIterable.makeString(String, String, String) and defaulting the start and end parameters to "" (the empty String).
        Specified by:
        makeString in interface RichIterable<T>
        Returns:
        a string representation of this collection.
      • makeString

        public java.lang.String makeString​(java.lang.String start,
                                           java.lang.String separator,
                                           java.lang.String end)
        Description copied from interface: RichIterable
        Returns a string representation of this collection with the elements separated by the specified separator and enclosed between the start and end strings.
        Specified by:
        makeString in interface RichIterable<T>
        Returns:
        a string representation of this collection.
      • makeString

        public java.lang.String makeString​(Function<? super T,​java.lang.Object> function,
                                           java.lang.String start,
                                           java.lang.String separator,
                                           java.lang.String end)
        Description copied from interface: RichIterable
        Returns a string representation of the collection, created by applying the function supplied to each element, with the elements separated by the specified separator and enclosed between the start and end strings.
        Specified by:
        makeString in interface RichIterable<T>
        Returns:
        a string representation of the mapped collection
      • appendString

        public void appendString​(java.lang.Appendable appendable)
        Description copied from interface: RichIterable
        Prints a string representation of this collection onto the given Appendable. Prints the string returned by RichIterable.makeString().
        Specified by:
        appendString in interface RichIterable<T>
      • appendString

        public void appendString​(java.lang.Appendable appendable,
                                 java.lang.String separator)
        Description copied from interface: RichIterable
        Prints a string representation of this collection onto the given Appendable. Prints the string returned by RichIterable.makeString(String).
        Specified by:
        appendString in interface RichIterable<T>
      • groupBy

        public <V,​R extends MutableMultimap<V,​T>> R groupBy​(Function<? super T,​? extends V> function,
                                                                        R target)
        Description copied from interface: RichIterable
        Same as RichIterable.groupBy(Function), except that the results are gathered into the specified target multimap.

        Example using a Java 8 method reference:

         FastListMultimap<String, Person> peopleByLastName =
             people.groupBy(Person::getLastName, new FastListMultimap<String, Person>());
         

        Example using an anonymous inner class:

         FastListMultimap<String, Person> peopleByLastName =
             people.groupBy(new Function<Person, String>()
             {
                 public String valueOf(Person person)
                 {
                     return person.getLastName();
                 }
             }, new FastListMultimap<String, Person>());
         
        Specified by:
        groupBy in interface RichIterable<T>
      • aggregateInPlaceBy

        public <K,​V> MutableMap<K,​V> aggregateInPlaceBy​(Function<? super T,​? extends K> groupBy,
                                                                    Function0<? extends V> zeroValueFactory,
                                                                    Procedure2<? super V,​? super T> mutatingAggregator)
        Description copied from interface: RichIterable
        Applies an aggregate procedure over the iterable grouping results into a Map based on the specific groupBy function. Aggregate results are required to be mutable as they will be changed in place by the procedure. A second function specifies the initial "zero" aggregate value to work with (i.e. new AtomicInteger(0)).
        Specified by:
        aggregateInPlaceBy in interface MutableCollection<T>
        Specified by:
        aggregateInPlaceBy in interface RichIterable<T>