Package com.singularsys.jep.misc.functions

Class ExpandingEle

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.jep.functions.NaryFunction

com.singularsys.jep.functions.Ele

com.singularsys.jep.misc.functions.ExpandingEle

All Implemented Interfaces:

LValueI, PostfixMathCommandI, Serializable

public class ExpandingEle
extends Ele

An var[index] function whose set(Evaluator, Node, Object) method modifies and expands the Vector<Object> value of the variable. This contrast with the the standard Ele class than creating a new Vector on each call to set and throws an EvaluationException if the index is out of range. This can be useful for creating large lists by repeatedly adding elements, for example:

primes = [2];
primes[2] = 3;
primes[3] = 5;

Since:

Jep 4.1

See Also:

• Serialized Form

Field Summary

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

indexShift

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

curNumberOfParameters, description, name, NaN, numberOfParameters

Constructor Summary

Constructors

Constructor	Description
ExpandingEle(Object val)
ExpandingEle(Object val, boolean shiftZero)

Method Summary

Modifier and Type	Method	Description
void	set(Evaluator pv, Node node, Object value)	Sets an element of an vector valued variable.

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

checkNumberOfParameters, ele, ele, ele, ele, eval, findIndex, getVariable

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

run

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

asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, asType, 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

ExpandingEle

public ExpandingEle(Object val)

ExpandingEle

public ExpandingEle(Object val,
 boolean shiftZero)

Method Details

set

public void set(Evaluator pv,
 Node node,
 Object value)
         throws EvaluationException

Description copied from class: Ele

Sets an element of an vector valued variable. For the expression u[2] = 5 the left hand node is ASTOpNode for the Ele pfmc the method will be called like set(pv,lhs,5); The value of the variable will be replaced by a new Vector<Object> with the appropriate element replaced.

Specified by:

set in interface LValueI

Overrides:

set in class Ele

Parameters:

pv - a pointer to the evaluator. The pv.eval() method can be used to evaluate the children of the node.

node - The top node for the LValue, root should be the ASTOpNode for the Ele pfmc.

value - the value obtained by evaluating the right-hand side.

Throws:

EvaluationException - if the calculation cannot be performed