Re: [ojAlgo-user] Exception in the prune method of the CoordinationSet Class

[Anders P. <an...@op...>]

If you get a NullPointerException you usually get s stacktrace that will tell you exactly where the problem occurred.

Individual series have a firstKey and a lastKey (provided they contain any entries at all). 

In order to coordinate multiple series, the CoordinationSet must determine the latest/last firstKey and the earliest/first lastKey of all series. In your CoordinationSet (I guess) you’ve input a series that is empty. You do state that “My firstKey isn't null. Just the earliestFirstKey.” but did you check all the series. There would typically be more than one.


/Anders



> On 10 Dec 2016, at 15:05, Vincent de CHACUS C. <dec...@ya...> wrote:
> 
> Hi Anders,
> 
> In the prune method of the CoordinationSet Class, what's the difference between the earliestFirstKey and the firstKey? And, this may be a long shot, but what scenario in my dataset could cause the earliestFirstKey to be null?
> 
> Note: My firstKey isn't null. Just the earliestFirstKey.
> 
> Thanks,
> Vince
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