Re: Overloading !=

[ A Bewes ]
> I've implemented __eq__() and __not__():
> so how come I can't evaluate != operator in Jython?
> 
> public class CurveData
> {
> <...>
>   public CurveData __eq__(Object obj)
>   {
>     return MathsAPI.eq(this,obj);
>   }
>   public CurveData __not__()
>   {
>     return MathsAPI.not(this);
>   }
> }

Hello Ant,

IMHO __not__() is not a special method, i suggest implementing __ne__()
instead. Please find below some methods of an interface I use to
implement for java classes participating in rich comparisons.

  /** <code><</code> */
  public boolean __lt__( Object other );
  
  /** <code><=</code> */
  public boolean __le__( Object other );
  
  /** <code>></code> */
  public boolean __gt__( Object other );
  
  /** <code>>=</code> */
  public boolean __ge__( Object other );
  
  /** <code>==</code> */
  public boolean __eq__( Object other );
  
  /** <code>!=</code> */
  public boolean __ne__( Object other );

You might also want to implement __nonzero__(). JythonEssentials,
around page 100, gives you more information about special methods. 
A little warning: not all special methods implemented by java classes
are called by Jython (see the thread starting here
http://aspn.activestate.com/ASPN/Mail/Message/Jython-dev/1415861 for a
discussion).

Best wishes,
Oti.

__________________________________________________
Do you Yahoo!?
Yahoo! Shopping - Send Flowers for Valentine's Day
http://shopping.yahoo.com


-------------------------------------------------------
This SF.NET email is sponsored by: FREE  SSL Guide from Thawte
are you planning your Web Server Security? Click here to get a FREE
Thawte SSL guide and find the answers to all your  SSL security issues.
http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en