the milliseconds might be a little better. Jim Ault Las Vegas
On 6/20/08 9:44 PM, "Sarah Reichelt" <[EMAIL PROTECTED]> wrote: > If these have to be unique, I would base them on "the seconds" as that > is very unlikely to be duplicated, unless you generate them all at > once, so produce many per second. > Converting the seconds to hex gives 8 characters, so that could be > most of the first segment in your ID. > > Then you could add in some machine-specific identifier if the IDs > generated by different people all had to be unique. > > Then pad it out to the correct length with random characters as before. > > Cheers, > Sarah > > > On Sat, Jun 21, 2008 at 2:12 PM, Sivakatirswami <[EMAIL PROTECTED]> wrote: >> I'm building a PicLens Publisher here that will do pretty much what the >> current PicLens Publisher does from CoolIris, with some additions to their >> Media RSS format that their app does not do. >> (see www.piclens.com) >> >> One thing I need to emulate is their GUID (Global Unique ID) generator which >> outputs unique len(36) random strings like >> >> 557B4610-65DC-4FEA-B6DC-32C3FA4B374D >> >> 24D2C85A-DD13-4B5D-9CCF-8F3ADC3E6CC7 >> >> 6B8CD7AA-11B5-4A0D-8EF1-0D6B18C80A17 >> >> 0B7815AE-AC47-457D-B2CA-F0280947220D >> >> there is no significance to these strings other than that the uniqueness of >> the string being close to infinity i.e. unlikely every to be duplicated >> again. >> >> This is something brand new for me... I'm curious if anyone knows the >> patterns here or has any idea of the algorithm being used. It does appear >> that the alpha chars are always a) caps b) never go beyond F This hints at a >> hexidecimal system underlying the algorithm. >> I presume one could request a random selection from the hex set: >> 0123456789ABCDEF >> and call this 36 times. i don't know why there is any need for hyphenated >> segments other than for readability.... >> >> But, it's pretty simple to write a generator the appears to emulate the >> algorithm.. I have this so far and it seems to do the job... any insights? >> >> on mouseUp >> repeat 5 times >> repeat 9 times >> put GetRandomHex() after tGUID >> end repeat >> put "-" after tGUID >> repeat 3 times >> repeat 4 times >> put GetRandomHex() after tGUID >> end repeat >> put "-" after tGUID >> end repeat >> repeat 12 times hexSet [tPickAnyOne] >> put GetRandomHex() after tGUID >> end repeat >> put tGUID & cr after tOutPut >> put empty into tGUID >> end repeat >> put tOutPut >> end mouseUp >> >> function GetRandomHex >> put "0 1 2 3 4 5 6 7 8 9 A B C D E F" into hexSet >> split hexSet by " " >> put random(16) into tPickAnyOne >> return hexSet [tPickAnyOne] >> end GetRandomHex >> >> delivers >> >> F2ACEA9EB-C3A5-F4CE-05B5-92888E1E80FA >> 66A5365D3-EF9A-EF00-66EB-6C82663130B7 >> 65634AD6D-8577-A757-310F-47287CF85389 >> E2A1DC66D-C58C-1F26-26BF-35EA95A46B5C >> BC04061AC-E3C5-3DEC-6EF3-7397B7757F8A >> >> >> Seem OK? >> >> >> _______________________________________________ >> use-revolution mailing list >> [email protected] >> Please visit this url to subscribe, unsubscribe and manage your subscription >> preferences: >> http://lists.runrev.com/mailman/listinfo/use-revolution >> > _______________________________________________ > use-revolution mailing list > [email protected] > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-revolution _______________________________________________ use-revolution mailing list [email protected] Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
