Package it.unimi.dsi.fastutil.chars
Class Char2DoubleFunctions.Singleton
- java.lang.Object
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- it.unimi.dsi.fastutil.chars.AbstractChar2DoubleFunction
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- it.unimi.dsi.fastutil.chars.Char2DoubleFunctions.Singleton
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- All Implemented Interfaces:
Char2DoubleFunction
,Function<Character,Double>
,Serializable
,Cloneable
,Function<Character,Double>
,IntToDoubleFunction
- Direct Known Subclasses:
Char2DoubleMaps.Singleton
- Enclosing class:
- Char2DoubleFunctions
public static class Char2DoubleFunctions.Singleton extends AbstractChar2DoubleFunction implements Serializable, Cloneable
An immutable class representing a type-specific singleton function. Note that the default return value is still settable.Note that albeit the function is immutable, its default return value may be changed.
This class may be useful to implement your own in case you subclass a type-specific function.
- See Also:
- Serialized Form
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Object
clone()
boolean
containsKey(char k)
Returns true if this function contains a mapping for the specified key.double
get(char k)
Returns the value to which the given key is mapped.int
size()
Returns the intended number of keys in this function, or -1 if no such number exists.-
Methods inherited from class it.unimi.dsi.fastutil.chars.AbstractChar2DoubleFunction
defaultReturnValue, defaultReturnValue
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Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface it.unimi.dsi.fastutil.chars.Char2DoubleFunction
applyAsDouble, containsKey, get, put, put, remove, remove
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Method Detail
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containsKey
public boolean containsKey(char k)
Description copied from interface:Char2DoubleFunction
Returns true if this function contains a mapping for the specified key.Note that for some kind of functions (e.g., hashes) this method will always return true. In particular, this default implementation always returns true.
- Specified by:
containsKey
in interfaceChar2DoubleFunction
- Parameters:
k
- the key.- Returns:
- true if this function associates a value to
key
. - See Also:
Function.containsKey(Object)
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get
public double get(char k)
Description copied from interface:Char2DoubleFunction
Returns the value to which the given key is mapped.- Specified by:
get
in interfaceChar2DoubleFunction
- Parameters:
k
- the key.- Returns:
- the corresponding value, or the default return value if no value was present for the given key.
- See Also:
Function.get(Object)
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size
public int size()
Description copied from interface:Function
Returns the intended number of keys in this function, or -1 if no such number exists.Most function implementations will have some knowledge of the intended number of keys in their domain. In some cases, however, this might not be possible. This default implementation, in particular, returns -1.
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clone
public Object clone()
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