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.db AB MSG LastUsed A 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.1 11 123 2 21 3 4If I could right justify the values, then they would sort correctly, alphanumerically. (0's are for formatting only)001 002 003 004 011 021 123So 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?Thanks Sam------------------------------------------------------------- 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/
Associated Messages, from the most recent to the oldest:
>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.db AB MSG LastUsed A 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.1 11 123 2 21 3 4If I could right justify the values, then they would sort correctly, alphanumerically. (0's are for formatting only)001 002 003 004 011 021 123So 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?Thanks Sam------------------------------------------------------------- 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
DOWNLOAD WEBDNA NOW!
Top Articles:
Talk List
The WebDNA community talk-list is the best place to get some help: several hundred extremely proficient programmers with an excellent knowledge of WebDNA and an excellent spirit will deliver all the tips and tricks you can imagine...
Related Readings:
RE: incrementing a counter remotely? (1999)
Is there an easier way? (1998)
Emailer Error 572 (2000)
The USArea® Network web site ... (1997)
Upgrade Pricing? (2003)
Problems with date math (1997)
Help! WebCat2 bug (Ben's input) (1997)
displaying New products (using [date]) (1997)
Help! Missing [showif] or [hideif] (2000)
Images in WebCat (2000)
Shipcost lookup? (1997)
OT: MSN.com no email (2003)
cc auth with [purchase] (1998)
WebCatalog/Mac 2.1b2 - PIXO (1997)
anyone ever find IE pops an [authenticate] when it shouldn't? (2000)
[WebDNA] Need to convert unix date? (2009)
ISAPI WC6a and Windows 2003 Web Edition (2006)
Date Formats (1997)
unable to launch acgi in WebCat (1997)
what servers are supported for Typhoon? (1997)