com.singularsys.jep.functions
Class Sum
java.lang.Object
com.singularsys.jep.functions.PostfixMathCommand
com.singularsys.jep.functions.Sum
- All Implemented Interfaces:
- PostfixMathCommandI, java.io.Serializable
public class Sum
- extends PostfixMathCommand
Adds it arguments sum(1,2,3,4,5)
will be 15.
Note does not expand array in its arguments so sum([1,2],[3,4])
is [4,6]
rather than 10.
This class serves mainly as an example of a function that accepts any number
of parameters. Note that the numberOfParameters is initialized to -1.
- See Also:
- Serialized Form
Field Summary |
protected static Add |
addFun
Function used to add pairs of items. |
Constructor Summary |
Sum()
Constructor. |
Method Summary |
boolean |
checkNumberOfParameters(int n)
Must have one or more parameter |
void |
run(java.util.Stack<java.lang.Object> stack)
Calculates the result of summing up all parameters. |
Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand |
asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, checkStack, getName, getNumberOfParameters, setCurNumberOfParameters, setName, toString |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
addFun
protected static Add addFun
- Function used to add pairs of items.
Sum
public Sum()
- Constructor.
checkNumberOfParameters
public boolean checkNumberOfParameters(int n)
- Must have one or more parameter
- Specified by:
checkNumberOfParameters
in interface PostfixMathCommandI
- Overrides:
checkNumberOfParameters
in class PostfixMathCommand
- Parameters:
n
- number of parameters function will be called with.
- Returns:
- false if an illegal number of parameters is supplied, true otherwise.
run
public void run(java.util.Stack<java.lang.Object> stack)
throws EvaluationException
- Calculates the result of summing up all parameters.
- Throws:
EvaluationException
Copyright © 2010 Singular Systems http://www.singularsys.com/jep