Re: Finer than a second.
This WebDNA talk-list message is from 2001
It keeps the original formatting.
numero = 38775
interpreted = N
texte = >Samuel Renkert wrote:>>>> How can I determine time with finer gradations than a second?>>>> I am trying to easily sequence visitors to a website. Something>> along the lines that I can>> [search ...VisitedTimesort=1...] to see who visited first and so on.>> I really need to *know* the order, it's not good enough to say these>> 3 visited within the same second. I figure if I can measure time> > with a fine enough gradation, I can cut down the collisions.
My goal is to serve up and index.html that [includes] 1 of 3 different files.The first visitor gets file A.The second gets file B.The third gets file C.The fourth gets file A.I originally planed to use [cart] and some sort of db.Msg.dbAB MSG LastUsedA Bland.inc ?B Sad.inc ?C Happy.inc ?So getting the next page becomes trivial, select the lowest LastUsed value, and set that records LastUsed to [cart].For [cart] to work for this purpose, it needs to be of consistent length (because 9 > 10 alphanumerically speaking) and ever-increasing (or monotonically increasing). Some other value would also be useful, if I could generate it, just so long as its always increasing.>That said, [cart]'s of the same length are sortable as ASCII and I>believe that [cart]'s should be monotonically increasing (even when>considering varying length) when compared as ASCII.> However, only>Grant or one of the current programmers would know for sure.I am confused on this varying length part. As alphanumeric comparisons on in a sense left justified so they sort weird if they are not of the same length.11112322134If I could right justify the values, then they would sort correctly, alphanumerically.(0's are for formatting only)001002003004011021123So what exactly do you mean? And can I change the way webcat sorts?> >>> I know I could do it with a small database that just increments a>> number for each page load. But I would like the solution to be as>> self contained as possible.>>This will introduce race conditions unless you use locking. This is>exactly what [cart] was invented to deal with.>Hmm, so then, any suggestions for my goal?ThanksSam-------------------------------------------------------------This message is sent to you because you are subscribed to the mailing list .To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://search.smithmicro.com/
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>Samuel Renkert wrote:>>>> How can I determine time with finer gradations than a second?>>>> I am trying to easily sequence visitors to a website. Something>> along the lines that I can>> [search ...VisitedTimesort=1...] to see who visited first and so on.>> I really need to *know* the order, it's not good enough to say these>> 3 visited within the same second. I figure if I can measure time> > with a fine enough gradation, I can cut down the collisions.My goal is to serve up and index.html that [includes] 1 of 3 different files.The first visitor gets file A.The second gets file B.The third gets file C.The fourth gets file A.I originally planed to use [cart] and some sort of db.Msg.dbAB MSG LastUsedA Bland.inc ?B Sad.inc ?C Happy.inc ?So getting the next page becomes trivial, select the lowest LastUsed value, and set that records LastUsed to [cart].For [cart] to work for this purpose, it needs to be of consistent length (because 9 > 10 alphanumerically speaking) and ever-increasing (or monotonically increasing). Some other value would also be useful, if I could generate it, just so long as its always increasing.>That said, [cart]'s of the same length are sortable as ASCII and I>believe that [cart]'s should be monotonically increasing (even when>considering varying length) when compared as ASCII.> However, only>Grant or one of the current programmers would know for sure.I am confused on this varying length part. As alphanumeric comparisons on in a sense left justified so they sort weird if they are not of the same length.11112322134If I could right justify the values, then they would sort correctly, alphanumerically.(0's are for formatting only)001002003004011021123So what exactly do you mean? And can I change the way webcat sorts?> >>> I know I could do it with a small database that just increments a>> number for each page load. But I would like the solution to be as>> self contained as possible.>>This will introduce race conditions unless you use locking. This is>exactly what [cart] was invented to deal with.>Hmm, so then, any suggestions for my goal?ThanksSam-------------------------------------------------------------This message is sent to you because you are subscribed to the mailing list .To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://search.smithmicro.com/
Samuel Renkert
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