[Biojava-l] equals() method for SymbolList

[Matthew Pocock]

Hi Lachlan,

SymbolList should be behaving like a string over its
symbols. It is silly if it doesn't do this. Hash codes
should realy be calculated in a different (but
sequence-dependant) way to avoid scanning the whole of
very large sequences just to do a hash lookup. Anyone
got any ideas?

If you have some code to do this then we can fold it
back into the project.

Matthew

 --- Lachlan Coin <lc1@sanger.ac.uk> wrote: 
> Hi,
> 
> I think this was raised a while back, but the
> equals() methods are not
> overridden in SymbolList classes, hence to compare
> equality you must do:
> sl1.toList().equals(sl2.toList()).
> 
> I was just wondering if it were possible to change
> this, so that two
> SymbolLists are equal if they contain the same
> symbols in the same order.
> It would make hashing against SymbolList more
> convenient.
> 
> Or is there a good way of getting around the problem
> of hashing against a
> SymbolList ?  I guess one way is to put sl.toList()
> as the key, but then
> when you pull out the keys later you can't convert
> back into SymbolList
> easily.
> 
> Thanks,
> 
> Lachlan
> 
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