[Glass] There is really no way to have an ordered/sorted collection together with indexes?

Norm Green via Glass glass at lists.gemtalksystems.com
Mon Aug 7 12:27:56 PDT 2017

Since you are keeping the prices sorted, you can lookup a price in the 
sorted list using a binary search.  This gives you a worst-case search 
of log2(n) +1, which should be pretty fast as long as the price 
comparison methods are fast.  You should be able to create a subclass of 
SortedCollection to do this.

Also keeping 2 collections that each reference the same large set of 
objects should not be that expensive in terms of repository size. That 
said, I agree that keeping the prices in 1 collection is a cleaner design.


On 8/7/17 11:23, Mariano Martinez Peck via Glass wrote:
> Hi guys,
> I am storing huge lists of "prices". For this, it really helps me to 
> store things ordered (by date)...either in an SequenceableCollection 
> or a SortedCollection. On the other hand, I do want to use indexes to 
> speedup my query to find price for a given date (equality index).
> But I have found no way to have them both. The only workaround I found 
> is to keep 2 collections for each of these collections, one 
> sorted/ordered, and the other one an unordered one for querying via 
> index. But this is a pain from "developing" point of view, as well as 
> for unnecessary repository growth.
> Am I missing something?
> Thanks in advance,
> -- 
> Mariano
> http://marianopeck.wordpress.com
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> Glass mailing list
> Glass at lists.gemtalksystems.com
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