Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.programmer > #34056

own stream reduction

Show all headers | View raw

Hello,

I try to buld an own reduction stream reduction for my data structure.
I Have create an interface with:

interface Fuzzy<T>
{
    T get();
    double getWeight();
}

So I have build a class with: class FuzzyBoolean implements Fuzzy<Boolean>
I have got a list with IFuzzy<Boolean> objects and I would like to do something like

List<IFuzzy<Boolean>> mylist;
IFuzzy<Boolean> result = mylist.stream().reduce( myfuzzyreducing );

I'm searching for a tutorial or example how I can create an own reduce operator of my own type. 

E.g. an reduction can be something like

Boolean b = true;
double w = 1;

for ( IFuzzy<Boolean> x : mylist )
{
    b = b || x.get();
    w = Math.min(w, x.getWeight());
}

new FuzzyBoolean( b, w );


or another

Boolean b = true;
double w = 0;

for ( IFuzzy<Boolean> x : mylist )
{
    b = b || x.get();
    w = w + x.getWeight()
}

new FuzzyBoolean( b, Math.max(1, w ) );


So I have got different reduction algorithms and would like to use this with the reduce( ) call.
How can I do this with an own streaming reduce structure?

Thanks

Phil

Back to comp.lang.java.programmer | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

own stream reduction Philipp Kraus <philipp.kraus.flashpixx@gmail.com> - 2016-04-02 07:10 -0700
  Re: own stream reduction Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-04-02 10:23 -0400
    Re: own stream reduction Sebastian <news@seyweiler.dyndns.org> - 2016-04-02 23:10 +0200
      Re: own stream reduction Philipp Kraus <philipp.kraus.flashpixx@gmail.com> - 2016-04-03 08:32 -0700

csiph-web