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Groups > comp.lang.java.programmer > #34282

Re: Working with an array of TreeSet

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On Wednesday 11 May 2016 02:14 CEST, Eric Sosman wrote:

> On 5/10/2016 5:22 PM, Cecil Westerhof wrote:
>> On Tuesday 10 May 2016 18:19 CEST, Marcel Mueller wrote:
>> [...]
>>> The more interesting question is why you need an array of TreeSet.
>>> What is the semantic meaning of from? And what is the meaning of
>>> to?
>>
>> I am mapping the connections of paths between nodes in a graph.
>> From a node to a node.
>
> Perhaps a
>
> 	Map<Node,Set<Node>>

All values from 1 to maxNode are there, but with Map I do not need a
dummy with a null. So this is better I think, yes. Also when I get a
situation where not every node number exists, this is certainly
better. Thanks.


> or (if there can be more than one Edge from Node X to Node Y)
>
> 	Map<Node,Collection<Node>>

There is only one. That is why I used TreeSet.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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Thread

Working with an array of TreeSet Cecil Westerhof <Cecil@decebal.nl> - 2016-05-10 13:37 +0200
  Re: Working with an array of TreeSet Eric Douglas <e.d.programmer@gmail.com> - 2016-05-10 04:52 -0700
    Re: Working with an array of TreeSet Cecil Westerhof <Cecil@decebal.nl> - 2016-05-10 15:07 +0200
  Re: Working with an array of TreeSet Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-05-10 08:03 -0400
  Re: Working with an array of TreeSet Marcel Mueller <news.5.maazl@spamgourmet.org> - 2016-05-10 18:19 +0200
    Re: Working with an array of TreeSet Cecil Westerhof <Cecil@decebal.nl> - 2016-05-10 23:22 +0200
      Re: Working with an array of TreeSet Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-05-10 20:14 -0400
        Re: Working with an array of TreeSet Cecil Westerhof <Cecil@decebal.nl> - 2016-05-11 09:05 +0200
          Re: Working with an array of TreeSet FredK <fred.l.kleinschmidt@gmail.com> - 2016-05-11 14:33 -0700
            Re: Working with an array of TreeSet Lew <lewbloch@gmail.com> - 2016-05-11 14:45 -0700

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