Re: Unique value creation

This WebDNA talk-list message is from

1999

It keeps the original formatting. numero = 23236
interpreted = N
texte = I was thinking about the same problem a few weeks ago. I was going to tryand use a combination of days/hours/mins/secs to establish a start value,then multiply that value times ten and then add a random number formattedto two digits. So that the result would be:days/hours/minsXX where xx would come from the random function. Is thatachievable?Math functions always tax my feeble mind so I havn't gotten around toactually writing the WebDNA and trying this idea out.Marty SchmidArtwerks>I can use the number of days/hours/mins/secs in some form or other to>create a *nearly* unique identifier number for each user, but how do I>create a truly unique value for two people who access the site during the>exact same second in time?>>It seems both of these users will have the exact same value, so it won't>be unique -- unless I tack on some kind of sequential index number that>simply cannot be re-used again during the same second in time, even by>another user.>>Using [random] won't work because there's a chance that the same random>number might come up again, and this solution has to guarantee *absolute*>uniqueness no matter what.>>How does the [cart] tag do it? Maybe I can use a similar technique. The>result must be no more than 12 characters in length, thus the reason I>cannot use the [cart] tag in this situation ...>>Sincerely,>Ken Grome Associated Messages, from the most recent to the oldest:

Unique value creation (Kenneth Grome 1999)
Re: Unique value creation (Marty Schmid 1999)

I was thinking about the same problem a few weeks ago. I was going to tryand use a combination of days/hours/mins/secs to establish a start value,then multiply that value times ten and then add a random number formattedto two digits. So that the result would be:days/hours/minsXX where xx would come from the random function. Is thatachievable?Math functions always tax my feeble mind so I havn't gotten around toactually writing the WebDNA and trying this idea out.Marty SchmidArtwerks>I can use the number of days/hours/mins/secs in some form or other to>create a *nearly* unique identifier number for each user, but how do I>create a truly unique value for two people who access the site during the>exact same second in time?>>It seems both of these users will have the exact same value, so it won't>be unique -- unless I tack on some kind of sequential index number that>simply cannot be re-used again during the same second in time, even by>another user.>>Using [random] won't work because there's a chance that the same random>number might come up again, and this solution has to guarantee *absolute*>uniqueness no matter what.>>How does the [cart] tag do it? Maybe I can use a similar technique. The>result must be no more than 12 characters in length, thus the reason I>cannot use the [cart] tag in this situation ...>>Sincerely,>Ken Grome Marty Schmid

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Re: Unique value creation

1999

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