On Sun, Nov 25, 2012 at 06:00:06PM +0100, Sébastien Brisard wrote: > Hi, > in MATH-803 [1] it was decided to deprecate RealVector.ebeMultiply/Divide, > because these methods were difficult to support with sparse vectors. > However, in MATH-870, we decided to deprecate sparse vectors altogether. > > I'm therefore having second thoughts on MATH-803. Since the problematic > implementations of RealVector are removed, why not keep these quite handy > methods? > > BTW, these methods could be implemented with visitors, but the current > interface of vector visitors allows visiting only ONE vector at a time. So > visiting TWO vectors simultaneously requires uggly tweaking of this > interface (basically, storing a reference of one of the two vectors to be > visited as a class variable of the visitor itself... so much for > imutability). > > How about we introduce "zip-visitors" to visit simultaneously two vectors?
I don't know the phrase "zip-visitors". How would they work? Regards, Gilles > This is just an idea, it can of course wait until 3.2, but if we agree upon > the idea, I can file a JIRA ticket for the record. > > Best regards, > > Sébastien > > [1] https://issues.apache.org/jira/browse/MATH-803 > [2] https://issues.apache.org/jira/browse/MATH-870 --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
