Hello Lars, Thank you. Where can I find the lily library? I can't find it on github or Google.
/David On Fri, Nov 30, 2012 at 3:54 AM, lars hofhansl <[email protected]> wrote: > As I said, look at the lily library they have solved exactly that problem, > I've used that before. > > It has encodings for Ints/Longs/Floats/Doubles/BigDecimals, to encode them > such the byte array will sort according to the magnitude of the value which > includes the sign and the floating point exponent. > > It's a very common problem :) > > > -- Lars > > > > ----- Original Message ----- > From: David Koch <[email protected]> > To: [email protected] > Cc: > Sent: Thursday, November 29, 2012 3:00 PM > Subject: Re: Using doubles and longs as ordering row values > > Hello, > > I am having a similar issue, only I need to preserve the order of > qualifiers which are serialized signed longs - rather than row keys. The > latter is addressed by the orderly library which was mentioned above. Can > this library be re-used for my purpose? I imagine this is not an exotic > requirement so I am also interested in knowing how other people have solved > this problem. > > Thank you, > > /David > > > On Tue, Nov 6, 2012 at 6:07 AM, Jonathan Bishop <[email protected] > >wrote: > > > Thanks Dave, > > > > That looks like what I need. > > > > Jon > > > > > > On Mon, Nov 5, 2012 at 4:27 PM, Dave Latham <[email protected]> wrote: > > > > > This fork looks a bit more up to date: > > > https://github.com/ndimiduk/orderly > > > > > > On Mon, Nov 5, 2012 at 4:26 PM, Dave Latham <[email protected]> > wrote: > > > > > > > Here's a project to deal with this issue specifically. I'm not sure > of > > > > it's status: > > > > https://github.com/conikeec/orderly > > > > > > > > > > > > On Mon, Nov 5, 2012 at 4:01 PM, lars hofhansl <[email protected]> > > > wrote: > > > > > > > >> Have a look at the lily library. It has code to encode Longs/Doubles > > > into > > > >> bytes such that resulting bytes sort as expected based on the > numbers. > > > >> > > > >> -- Lars > > > >> > > > >> > > > >> > > > >> ________________________________ > > > >> From: Jonathan Bishop <[email protected]> > > > >> To: "[email protected]" <[email protected]> > > > >> Sent: Monday, November 5, 2012 10:41 AM > > > >> Subject: Using doubles and longs as ordering row values > > > >> > > > >> Hi, > > > >> > > > >> In my application my row values are doubles. I would like my scans > to > > > >> traverse the rows in order of increasing values. > > > >> > > > >> But if I simply use > > > >> > > > >> double d = .... > > > >> byte[] row = Bytes.toBytes(d); > > > >> > > > >> I will get an ordering which is based on the byte values of doubles, > > not > > > >> on > > > >> the value of the doubles themselves. > > > >> > > > >> I see also that integer values have the same issue due to the first > > bit > > > >> being the sign bit. So negative values will come after positive > > values. > > > >> > > > >> Any suggestions? > > > >> > > > >> Thanks, > > > >> > > > >> Jon > > > >> > > > > > > > > > > > > > > >
