filter dataset

[Lydia Ickler <ic...@googlemail.com>]

Hi all, 

I have a DataSet<Tuple3<Integer, Integer, Double> and I want to apply a filter to only get back all entries with e.g. first Integer in tuple == 0. 
With a normal filter I do not have the possibility to pass an an additional argument but I have to set that parameter inside the filter function. 
Is there a possibility to send a parameter to make the filter more flexible? 
How would be the smartest way to do so?

Best regards, 
Lydia

Re: filter dataset

[Stefano Baghino <st...@radicalbit.io>]

Hi Lydia,

you can use a variable outside the scope of the normal filter (the one that
you define inline, if I understand correctly), like this:

*final* int *filterParameter* = 0;

dataset.filter(new FilterFunction<Integer, Integer, Double> () {
    @Override
    public boolean filter(Integer value) {
        return value == *filterParameter*;
    }
}

The only catch is that you have to make the variable *final*.

Does this answer your question? Hope I've been helpful.

Best,
Stefano

On Mon, Feb 29, 2016 at 11:14 AM, Lydia Ickler <ic...@googlemail.com>
wrote:

> Hi all,
>
> I have a DataSet<Tuple3<Integer, Integer, Double> and I want to apply a
> filter to only get back all entries with e.g. first Integer in tuple == 0.
> With a normal filter I do not have the possibility to pass an an
> additional argument but I have to set that parameter inside the filter
> function.
> Is there a possibility to send a parameter to make the filter more
> flexible?
> How would be the smartest way to do so?
>
> Best regards,
> Lydia




-- 
BR,
Stefano Baghino

Software Engineer @ Radicalbit