Re: unique ascending numbers
This WebDNA talk-list message is from 2003
It keeps the original formatting.
numero = 50188
interpreted = N
texte = Marc Kaiwi wrote: > It does??? ... You're kidding? > > I'd have to actually understand how that logic would work before I could > trust it. I'd really be interested to know if this is true and why. > That's interesting. > The cart is a combination of number of seconds since some epoch plus some digits to ensure that the cart is unique. If you imagine them being sorted like this:105244932297945 105244958598570 105244988499578 1052449988100087 1052450903103312 1052451205103863 1052451955106628 1052453196109064as a string of digits, not as a number, you'll see in the case of those carts above, the first 8 characters uniquely determine the sort order. If there were more carts being generated closer together in time, you might need 10 or even 12 or 14 characters to sort them. But [cart] does provide a unique, sortable increasing sequence, no matter how many [cart]'s are being generated (within reason).John-- John Peacock Director of Information Research and Technology Rowman & Littlefield Publishing Group 4501 Forbes Boulevard Suite H Lanham, MD 20706 301-459-3366 x.5010 fax 301-429-5748 ------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list
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Associated Messages, from the most recent to the oldest:
Marc Kaiwi wrote: > It does??? ... You're kidding? > > I'd have to actually understand how that logic would work before I could > trust it. I'd really be interested to know if this is true and why. > That's interesting. > The cart is a combination of number of seconds since some epoch plus some digits to ensure that the cart is unique. If you imagine them being sorted like this:105244932297945 105244958598570 105244988499578 1052449988100087 1052450903103312 1052451205103863 1052451955106628 1052453196109064as a string of digits, not as a number, you'll see in the case of those carts above, the first 8 characters uniquely determine the sort order. If there were more carts being generated closer together in time, you might need 10 or even 12 or 14 characters to sort them. But [cart] does provide a unique, sortable increasing sequence, no matter how many [cart]'s are being generated (within reason).John-- John Peacock Director of Information Research and Technology Rowman & Littlefield Publishing Group 4501 Forbes Boulevard Suite H Lanham, MD 20706 301-459-3366 x.5010 fax 301-429-5748 ------------------------------------------------------------- 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://webdna.smithmicro.com/
John Peacock
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