Package com.carrotsearch.hppc
Class DoubleObjectHashMap.KeysContainer
java.lang.Object
com.carrotsearch.hppc.AbstractDoubleCollection
com.carrotsearch.hppc.DoubleObjectHashMap.KeysContainer
- All Implemented Interfaces:
DoubleCollection
,DoubleContainer
,DoubleLookupContainer
,Iterable<DoubleCursor>
- Enclosing class:
DoubleObjectHashMap<VType>
public final class DoubleObjectHashMap.KeysContainer
extends AbstractDoubleCollection
implements DoubleLookupContainer
A view of the keys inside this hash map.
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
clear()
Removes all elements from this collection.boolean
contains
(double e) Lookup a given element in the container.<T extends DoubleProcedure>
TforEach
(T procedure) Applies aprocedure
to all container elements.boolean
isEmpty()
Shortcut forsize() == 0
.iterator()
Returns an iterator to a cursor traversing the collection.void
release()
Removes all elements from the collection and additionally releases any internal buffers.int
removeAll
(double e) Removes all occurrences ofe
from this collection.int
removeAll
(DoublePredicate predicate) Removes all elements in this collection for which the given predicate returnstrue
.int
size()
Return the current number of elements in this container.Methods inherited from class com.carrotsearch.hppc.AbstractDoubleCollection
removeAll, retainAll, retainAll, toArray, toString
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Methods inherited from interface com.carrotsearch.hppc.DoubleContainer
toArray
Methods inherited from interface java.lang.Iterable
forEach, spliterator
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Field Details
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owner
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Constructor Details
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KeysContainer
public KeysContainer()
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Method Details
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contains
public boolean contains(double e) Description copied from interface:DoubleContainer
Lookup a given element in the container. This operation has no speed guarantees (may be linear with respect to the size of this container).- Specified by:
contains
in interfaceDoubleContainer
- Specified by:
contains
in interfaceDoubleLookupContainer
- Returns:
- Returns
true
if this container has an element equal toe
.
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forEach
Description copied from interface:DoubleContainer
Applies aprocedure
to all container elements. Returns the argument (any subclass ofDoubleProcedure
. This lets the caller to call methods of the argument by chaining the call (even if the argument is an anonymous type) to retrieve computed values, for example (IntContainer):int count = container.forEach(new IntProcedure() { int count; // this is a field declaration in an anonymous class. public void apply(int value) { count++; } }).count;
- Specified by:
forEach
in interfaceDoubleContainer
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forEach
Description copied from interface:DoubleContainer
Applies apredicate
to container elements as long, as the predicate returnstrue
. The iteration is interrupted otherwise.- Specified by:
forEach
in interfaceDoubleContainer
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isEmpty
public boolean isEmpty()Description copied from interface:DoubleContainer
Shortcut forsize() == 0
.- Specified by:
isEmpty
in interfaceDoubleContainer
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iterator
Description copied from interface:DoubleContainer
Returns an iterator to a cursor traversing the collection. The order of traversal is not defined. More than one cursor may be active at a time. The behavior of iterators is undefined if structural changes are made to the underlying collection.The iterator is implemented as a cursor and it returns the same cursor instance on every call to
Iterator.next()
(to avoid boxing of primitive types). To read the current list's value (or index in the list) use the cursor's public fields. An example is shown below.for (DoubleCursor<double> c : container) { System.out.println("index=" + c.index + " value=" + c.value); }
- Specified by:
iterator
in interfaceDoubleContainer
- Specified by:
iterator
in interfaceIterable<DoubleCursor>
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size
public int size()Description copied from interface:DoubleContainer
Return the current number of elements in this container. The time for calculating the container's size may takeO(n)
time, although implementing classes should try to maintain the current size and return in constant time.- Specified by:
size
in interfaceDoubleContainer
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clear
public void clear()Description copied from interface:DoubleCollection
Removes all elements from this collection.- Specified by:
clear
in interfaceDoubleCollection
- See Also:
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release
public void release()Description copied from interface:DoubleCollection
Removes all elements from the collection and additionally releases any internal buffers. Typically, if the object is to be reused, a simpleDoubleCollection.clear()
should be a better alternative since it'll avoid reallocation.- Specified by:
release
in interfaceDoubleCollection
- See Also:
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removeAll
Description copied from interface:DoubleCollection
Removes all elements in this collection for which the given predicate returnstrue
.- Specified by:
removeAll
in interfaceDoubleCollection
- Returns:
- Returns the number of removed elements.
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removeAll
public int removeAll(double e) Description copied from interface:DoubleCollection
Removes all occurrences ofe
from this collection.- Specified by:
removeAll
in interfaceDoubleCollection
- Parameters:
e
- Element to be removed from this collection, if present.- Returns:
- The number of removed elements as a result of this call.
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