JxnD (JXN apidocs)

java.lang.Object
- JxnFunction
- - JxnD

All Implemented Interfaces:

DoublePredicate
```
public class JxnD
extends JxnFunction
implements DoublePredicate
```
The classes JxnF, JxnF2, JxnI, JxnL and JxnD together implement all interfaces of package java.util.function for java.util.stream. This allows to explore and use java → aggregate operations interactively from JXN. JxnF implements all single or zero parameter methods, JxnF2 all double parameter methods and JxnI, JxnL and JxnD methods incompatible with Predicate.

See Also:

AggregateOperations_Demo.jxn

Constructor Summary

Constructors
Constructor	Description
`JxnD(JxnFunction f)`	Constructs `JxnD` from an already defined `JxnFunction f`.
`JxnD(KmgFormelInterpreter fi, String cmd)`	Calls constructor `JxnFunction( fi, cmd )`.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected Object`	`exec(Object[] args)`	Maps `args` to `$_` and the names passed to the constructor via `parameterNames`.
`protected Object`	`execute(Object arg)`
`boolean`	`test(double value)`	Implements `DoublePredicate` for `DoubleStream.filter(…)`, `.allMatch(…)`, `.anyMatch(…)`, `.noneMatch(…)`.

Methods inherited from interface java.util.function.DoublePredicate
and, negate, or

Methods inherited from class JxnFunction
getArityLenience, getDebug, getShowConditional, getShowInternalResults, setArityLenience, setDebug, setShowConditional, setShowInternalResults, toString

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - JxnD
```
public JxnD(JxnFunction f)
```
    Constructs JxnD from an already defined JxnFunction f.
    Can be used, if f is defined using jxn special commands: #function f ... #endfunction
    
    See Also:
    
    JxnF2(JxnFunction)
  - JxnD
```
public JxnD(KmgFormelInterpreter fi,
            String cmd)
```
    Calls constructor JxnFunction( fi, cmd ).
    
    Parameters:
    
    cmd - statement_sequence (one or more statements separated by ';') or #filename[.jxn]. (Note: jxn does not support {…} blocks as possible in java → lambda expressions)
    
    See Also:
    
    JxnF2(KmgFormelInterpreter,java.lang.String)
- Method Detail
  - execute
```
protected Object execute(Object arg)
```
  - exec
```
protected Object exec(Object[] args)
```
    Description copied from class: JxnFunction
    
    Maps args to $_ and the names passed to the constructor via parameterNames.
    Example:
    fn = @JxnFunction( … ) ! calls a constructor to create a function instance fn
    :
    fn( arg1, arg2, ..., argN ) ! ⇒ jxn internally calls fn.exec( { arg1, arg2, ..., argN } )
    
    Overrides:
    
    exec in class JxnFunction
  - test
```
public boolean test(double value)
```
    Implements DoublePredicate for DoubleStream.filter(…), .allMatch(…), .anyMatch(…), .noneMatch(…).
    
    Specified by:
    
    test in interface DoublePredicate