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java.lang.Objectit.unimi.dsi.fastutil.objects.AbstractObject2DoubleFunction<K>
it.unimi.dsi.fastutil.objects.Object2DoubleFunctions.EmptyFunction<K>
public static class Object2DoubleFunctions.EmptyFunction<K>
An immutable class representing an empty type-specific function.
This class may be useful to implement your own in case you subclass a type-specific function.
Method Summary | |
---|---|
void |
clear()
Removes all associations from this function (optional operation). |
java.lang.Object |
clone()
|
boolean |
containsKey(java.lang.Object k)
Returns true if this function contains a mapping for the specified key. |
double |
defaultReturnValue()
Gets the default return value. |
void |
defaultReturnValue(double defRetValue)
Sets the default return value. |
double |
getDouble(java.lang.Object 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.objects.AbstractObject2DoubleFunction |
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get, put, put, remove, removeDouble |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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public double getDouble(java.lang.Object k)
Object2DoubleFunction
getDouble
in interface Object2DoubleFunction<K>
k
- the key.
Function.get(Object)
public boolean containsKey(java.lang.Object k)
Function
Note that for some kind of functions (e.g., hashes) this method will always return true.
containsKey
in interface Function<K,java.lang.Double>
k
- the key.
key
.Map.containsKey(Object)
public double defaultReturnValue()
Object2DoubleFunction
defaultReturnValue
in interface Object2DoubleFunction<K>
defaultReturnValue
in class AbstractObject2DoubleFunction<K>
public void defaultReturnValue(double defRetValue)
Object2DoubleFunction
get()
, put()
and remove()
to
denote that the map does not contain the specified key. It must be
0/false
/null
by default.
defaultReturnValue
in interface Object2DoubleFunction<K>
defaultReturnValue
in class AbstractObject2DoubleFunction<K>
defRetValue
- the new default return value.Object2DoubleFunction.defaultReturnValue()
public int size()
Function
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.
size
in interface Function<K,java.lang.Double>
public void clear()
Function
clear
in interface Function<K,java.lang.Double>
clear
in class AbstractObject2DoubleFunction<K>
Map.clear()
public java.lang.Object clone()
clone
in class java.lang.Object
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