Package com.singularsys.jep.misc.dictionary

Class ContainsKey

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.jep.functions.BinaryFunction

com.singularsys.jep.misc.dictionary.ContainsKey

All Implemented Interfaces:

PostfixMathCommandI, Serializable

public class ContainsKey
extends BinaryFunction

Tests if the map contains a given key.

map = {'x':2, 'y':3};
containsKey(map, 'x');

Returns true if the map contains a key, false otherwise.

Since:

Jep 4.1

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.singularsys.jep.functions.BinaryFunction

BinaryFunction.BiFunctionWithException<T>

Field Summary

Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand

curNumberOfParameters, description, name, NaN, numberOfParameters

Constructor Summary

Constructors

Constructor	Description
ContainsKey()

Method Summary

Modifier and Type	Method	Description
protected boolean	equals(Object key, Object k)	Test if key equals k.
Object	eval(Object l, Object key)	Evaluate the function
protected Object	eval(List<?> list, Object key)
protected Object	eval(Map<Object,Object> map, Object key)

Methods inherited from class com.singularsys.jep.functions.BinaryFunction

instanceOf, instanceOf, instanceOf, instanceOf, run

Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand

asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, asType, checkNumberOfParameters, getDescription, getDescription, getDescriptionWithType, getName, getNumberOfParameters, setCurNumberOfParameters, setDescription, setName, toString, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

ContainsKey

public ContainsKey()

Method Details

eval

public Object eval(Object l,
 Object key)
            throws EvaluationException

Description copied from class: BinaryFunction

Evaluate the function

Specified by:

eval in class BinaryFunction

Parameters:

l - lhs argument

key - rhs argument

Returns:

the results

Throws:

EvaluationException - if the function cannot be evaluated.

eval

protected Object eval(Map<Object,Object> map,
 Object key)
               throws EvaluationException

Throws:

EvaluationException

eval

protected Object eval(List<?> list,
 Object key)
               throws EvaluationException

Throws:

EvaluationException

equals

protected boolean equals(Object key,
 Object k)
                  throws EvaluationException

Test if key equals k. Default implementation uses key.equals(k)

Parameters:

key - key to test

k - key to test

Returns:

true if parameters are equal

Throws:

EvaluationException