IntDoubleHashMap.KeysContainer (HPPC v0.8.1 API Documentation)

java.lang.Object
- com.carrotsearch.hppc.IntDoubleHashMap.KeysContainer

All Implemented Interfaces:

IntCollection, IntContainer, IntLookupContainer, java.lang.Iterable<IntCursor>

Enclosing class:

IntDoubleHashMap
```
public final class IntDoubleHashMap.KeysContainer
extends java.lang.Object
implements IntLookupContainer
```
A view of the keys inside this hash map.

Constructor Summary

Constructors
Constructor Description

KeysContainer()

Constructors
Constructor	Description
`KeysContainer()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clear()`	Removes all elements from this collection.
`boolean`	`contains(int e)`	Lookup a given element in the container.
`<T extends IntProcedure> T`	`forEach(T procedure)`	Applies a `procedure` to all container elements.
`boolean`	`isEmpty()`	Shortcut for `size() == 0`.
`java.util.Iterator<IntCursor>`	`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(IntLookupContainer c)`	Default implementation uses a predicate for removal.
`int`	`removeAll(int e)`	Removes all occurrences of `e` from this collection.
`int`	`removeAll(IntPredicate predicate)`	Removes all elements in this collection for which the given predicate returns `true`.
`int`	`retainAll(IntLookupContainer c)`	Default implementation uses a predicate for retaining.
`int`	`retainAll(IntPredicate predicate)`	Default implementation redirects to `IntCollection.removeAll(IntPredicate)` and negates the predicate.
`int`	`size()`	Return the current number of elements in this container.
`int[]`	`toArray()`	Default implementation of copying to an array.
`java.lang.String`	`toString()`	Convert the contents of this container to a human-friendly string.

Methods inherited from interface com.carrotsearch.hppc.IntContainer
toArray

Methods inherited from interface java.lang.Iterable
forEach, spliterator

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - KeysContainer
```
public KeysContainer()
```
- Method Detail
  - contains
```
public boolean contains(int e)
```
    Description copied from interface: IntContainer
    
    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 interface IntContainer
    
    Specified by:
    
    contains in interface IntLookupContainer
    
    Returns:
    
    Returns true if this container has an element equal to e.
  - forEach
```
public <T extends IntProcedure> T forEach(T procedure)
```
    Description copied from interface: IntContainer
    Applies a procedure to all container elements. Returns the argument (any subclass of IntProcedure. 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 interface IntContainer
  - forEach
```
public <T extends IntPredicate> T forEach(T predicate)
```
    Description copied from interface: IntContainer
    
    Applies a predicate to container elements as long, as the predicate returns true. The iteration is interrupted otherwise.
    
    Specified by:
    
    forEach in interface IntContainer
  - isEmpty
```
public boolean isEmpty()
```
    Description copied from interface: IntContainer
    
    Shortcut for size() == 0.
    
    Specified by:
    
    isEmpty in interface IntContainer
  - iterator
```
public java.util.Iterator<IntCursor> iterator()
```
    Description copied from interface: IntContainer
    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 (IntCursor<int> c : container) {
   System.out.println("index=" + c.index + " value=" + c.value);
 }
 
```
    Specified by:
    
    iterator in interface IntContainer
    
    Specified by:
    
    iterator in interface java.lang.Iterable<IntCursor>
  - size
```
public int size()
```
    Description copied from interface: IntContainer
    
    Return the current number of elements in this container. The time for calculating the container's size may take O(n) time, although implementing classes should try to maintain the current size and return in constant time.
    
    Specified by:
    
    size in interface IntContainer
  - clear
```
public void clear()
```
    Description copied from interface: IntCollection
    
    Removes all elements from this collection.
    
    Specified by:
    
    clear in interface IntCollection
    
    See Also:
    
    IntCollection.release()
  - release
```
public void release()
```
    Description copied from interface: IntCollection
    
    Removes all elements from the collection and additionally releases any internal buffers. Typically, if the object is to be reused, a simple IntCollection.clear() should be a better alternative since it'll avoid reallocation.
    
    Specified by:
    
    release in interface IntCollection
    
    See Also:
    
    IntCollection.clear()
  - removeAll
```
public int removeAll(IntPredicate predicate)
```
    Description copied from interface: IntCollection
    
    Removes all elements in this collection for which the given predicate returns true.
    
    Specified by:
    
    removeAll in interface IntCollection
    
    Returns:
    
    Returns the number of removed elements.
  - removeAll
```
public int removeAll(int e)
```
    Description copied from interface: IntCollection
    
    Removes all occurrences of e from this collection.
    
    Specified by:
    
    removeAll in interface IntCollection
    
    Parameters:
    
    e - Element to be removed from this collection, if present.
    
    Returns:
    
    The number of removed elements as a result of this call.
  - removeAll
```
public int removeAll(IntLookupContainer c)
```
    Default implementation uses a predicate for removal.
    
    Specified by:
    
    removeAll in interface IntCollection
    
    Returns:
    
    Returns the number of removed elements.
  - retainAll
```
public int retainAll(IntLookupContainer c)
```
    Default implementation uses a predicate for retaining.
    
    Specified by:
    
    retainAll in interface IntCollection
    
    Returns:
    
    Returns the number of removed elements.
  - retainAll
```
public int retainAll(IntPredicate predicate)
```
    Default implementation redirects to IntCollection.removeAll(IntPredicate) and negates the predicate.
    
    Specified by:
    
    retainAll in interface IntCollection
    
    Returns:
    
    Returns the number of removed elements.
  - toArray
```
public int[] toArray()
```
    Default implementation of copying to an array.
    
    Specified by:
    
    toArray in interface IntContainer
  - toString
```
public java.lang.String toString()
```
    Convert the contents of this container to a human-friendly string.
    
    Overrides:
    
    toString in class java.lang.Object

Class IntDoubleHashMap.KeysContainer

Constructor Summary

Method Summary

Methods inherited from interface com.carrotsearch.hppc.IntContainer

Methods inherited from interface java.lang.Iterable

Methods inherited from class java.lang.Object

Constructor Detail

KeysContainer

Method Detail

contains

forEach

forEach

isEmpty

iterator

size

clear

release

removeAll

removeAll

removeAll

retainAll

retainAll

toArray

toString