Re: Req: Array Tags Explained, simple and clear

This WebDNA talk-list message is from

2004

It keeps the original formatting. numero = 55143
interpreted = N
texte = Hi Marc,Thanks a lot for spending some time trying to explain the Array tags for me.I have a couple of questions before I might get (understand) it ;)So what your are telling me is that the Array function is mostly, if not only, used when working with template variables, or?Your "top selling books" example. Let's say your have a database of 10.000 books in your WebDNA database, with 10.000 names and 10.000 NumSold fields. Why just not do a normal Search and Sort to see the top 4 selling books? How does the Array tag come handy here?I really need to see the difference in using a normal Search and Sort function compared to the Array function... I'm just a bit confused here... and really need to learn the Array function.Currently I have a quite large Forum system build up using WebDNA and I hope that the Array function will give me some new possibilities towards performance and functionality.Hope to hear from you soon again.PalleOn 31/12-2003, at 19.28, Marc Kaiwi wrote:> You're right, the online docs for [ARRAYGET] are very confusing, for > example I don't understand if you can simply call an array variable > name [MyArray(1,2)] outside the [ARRAYGET] context or what the syntax > is?>> Anyway, arrays are really useful and easy to understand once you get > the hang of it. I don't have WebDNA 5 so this code won't work as > displayed but hopefully I can express the concept of using a simple > array in a practical way.>> At some point in your programming career you're going to find yourself > using lots of variables like: [book1], [book2], [book3], [book4], ... > etc,. This is a good sign that it might be easier to use an array.>> For example, we'll assume you have a "list" of your 4 current top > selling books and the number of books sold for each. You might make > assignments like this:> [TEXT] book1=John[/TEXT]> [TEXT] book2=Mark[/TEXT]> [TEXT] book3=Matthew[/TEXT]> [TEXT] book4=Luke[/TEXT]> And then> [TEXT] book1_NumSold=50[/TEXT]> [TEXT] book2_NumSold=40[/TEXT]> [TEXT] book3_NumSold=30[/TEXT]> [TEXT] book4_NumSold=12[/TEXT]>> In this case you would access these values using:> Our top selling book is [Books1] it has sold [book1_NumSold] copies!>> Or you could set up an array with these same values:>> [ARRAYSET NAME=Books&DIM=4,2] [/arrayset] --> creates an empty two > dimensional array (think of it as a table) that looks like this:> [1][2][3][4]> [1] 0 0 0 0> [2] 0 0 0 0>> [ARRAYSET NAME= Books]> (1,1)=John&(2,1)=Mark&(3,1)=Matthew&(4,1)=Luke&(1,2)=50&(2,2)=40&(3,2)= > 30&(4,2)=12> [/ARRAYSET]>> Now you have an array that looks like this:> [1][2][3][4]> [1]JohnMarkMatthewLuke> [2] 50403012>> So that you can access these values using the array's variable name > (again, I don't have v5 so I'm not sure of the syntax here):>> Our top selling book is [Books(1,1)] it has sold [Books(1,2)] copies!>> And the best part is that using arrays makes it easy to loop through > and list all of the books:>> [loop start=1&end=4]> Our number [index] selling book is [Books([index],1)], it has sold > [Books([index],2)] copies!> [/loop]>> Kind of a simple and silly example but I hope this helps a little. : c)>> Good luck!>> MK>> On Tuesday, December 30, 2003, at 11:00 AM, Palle Bo Nielsen wrote:>>> ... Anyway - more important. I have run through the WebDNALab >> tutorial and it just ain't good enough for me. I need a real world >> example doing some real stuff - not just numbers and letters.>>>> Anyone willing to spend some time trying to explain the Array tags >> using a real world example?>>>> PowerPalle>>>> Signed: Marc Kaiwi>>> -------------------------------------------------------------> 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/>>--Venlig hilsenPalle B. Nielsen (PowerPalle)http://www.macnyt.dk/-------------------------------------------------------------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/ Associated Messages, from the most recent to the oldest:

Re: Req: Array Tags Explained, simple and clear ( Donovan Brooke 2004)
Re: Req: Array Tags Explained, simple and clear ( Donovan Brooke 2004)
Re: Req: Array Tags Explained, simple and clear ( "Nitai @ ComputerOil" 2004)
Re: Req: Array Tags Explained, simple and clear ( Palle Bo Nielsen 2004)
Re: Req: Array Tags Explained, simple and clear ( Palle Bo Nielsen 2004)
Re: Req: Array Tags Explained, simple and clear ( "Nitai @ ComputerOil" 2004)
Re: Req: Array Tags Explained, simple and clear ( "Nitai @ ComputerOil" 2004)
Re: Req: Array Tags Explained, simple and clear ( Donovan Brooke 2004)
Re: Req: Array Tags Explained, simple and clear ( Marc Kaiwi 2004)
Re: Req: Array Tags Explained, simple and clear ( Palle Bo Nielsen 2004)
Re: Req: Array Tags Explained, simple and clear ( Marc Kaiwi 2003)
Re: Req: Array Tags Explained, simple and clear ( "Nitai @ ComputerOil" 2003)
Re: Req: Array Tags Explained, simple and clear ( Palle Bo Nielsen 2003)
Re: Req: Array Tags Explained, simple and clear ( "Scott Anderson" 2003)
Re: Req: Array Tags Explained, simple and clear ( Palle Bo Nielsen 2003)
Re: Req: Array Tags Explained, simple and clear ( Phillip Bonesteele 2003)
Re: Req: Array Tags Explained, simple and clear ( Donovan Brooke 2003)
Req: Array Tags Explained, simple and clear ( Palle Bo Nielsen 2003)

Hi Marc,Thanks a lot for spending some time trying to explain the Array tags for me.I have a couple of questions before I might get (understand) it ;)So what your are telling me is that the Array function is mostly, if not only, used when working with template variables, or?Your "top selling books" example. Let's say your have a database of 10.000 books in your WebDNA database, with 10.000 names and 10.000 NumSold fields. Why just not do a normal Search and Sort to see the top 4 selling books? How does the Array tag come handy here?I really need to see the difference in using a normal Search and Sort function compared to the Array function... I'm just a bit confused here... and really need to learn the Array function.Currently I have a quite large Forum system build up using WebDNA and I hope that the Array function will give me some new possibilities towards performance and functionality.Hope to hear from you soon again.PalleOn 31/12-2003, at 19.28, Marc Kaiwi wrote:> You're right, the online docs for [ARRAYGET] are very confusing, for > example I don't understand if you can simply call an array variable > name [MyArray(1,2)] outside the [ARRAYGET] context or what the syntax > is?>> Anyway, arrays are really useful and easy to understand once you get > the hang of it. I don't have WebDNA 5 so this code won't work as > displayed but hopefully I can express the concept of using a simple > array in a practical way.>> At some point in your programming career you're going to find yourself > using lots of variables like: [book1], [book2], [book3], [book4], ... > etc,. This is a good sign that it might be easier to use an array.>> For example, we'll assume you have a "list" of your 4 current top > selling books and the number of books sold for each. You might make > assignments like this:> [text] book1=John[/TEXT]> [text] book2=Mark[/TEXT]> [text] book3=Matthew[/TEXT]> [text] book4=Luke[/TEXT]> And then> [text] book1_NumSold=50[/TEXT]> [text] book2_NumSold=40[/TEXT]> [text] book3_NumSold=30[/TEXT]> [text] book4_NumSold=12[/TEXT]>> In this case you would access these values using:> Our top selling book is [Books1] it has sold [book1_NumSold] copies!>> Or you could set up an array with these same values:>> [ARRAYSET NAME=Books&DIM=4,2] [/arrayset] --> creates an empty two > dimensional array (think of it as a table) that looks like this:> [1][2][3][4]> [1] 0 0 0 0> [2] 0 0 0 0>> [ARRAYSET NAME= Books]> (1,1)=John&(2,1)=Mark&(3,1)=Matthew&(4,1)=Luke&(1,2)=50&(2,2)=40&(3,2)= > 30&(4,2)=12> [/ARRAYSET]>> Now you have an array that looks like this:> [1][2][3][4]> [1]JohnMarkMatthewLuke> [2] 50403012>> So that you can access these values using the array's variable name > (again, I don't have v5 so I'm not sure of the syntax here):>> Our top selling book is [Books(1,1)] it has sold [Books(1,2)] copies!>> And the best part is that using arrays makes it easy to loop through > and list all of the books:>> [loop start=1&end=4]> Our number [index] selling book is [Books([index],1)], it has sold > [Books([index],2)] copies!> [/loop]>> Kind of a simple and silly example but I hope this helps a little. : c)>> Good luck!>> MK>> On Tuesday, December 30, 2003, at 11:00 AM, Palle Bo Nielsen wrote:>>> ... Anyway - more important. I have run through the WebDNALab >> tutorial and it just ain't good enough for me. I need a real world >> example doing some real stuff - not just numbers and letters.>>>> Anyone willing to spend some time trying to explain the Array tags >> using a real world example?>>>> PowerPalle>>>> Signed: Marc Kaiwi>>> -------------------------------------------------------------> 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/>>--Venlig hilsenPalle B. Nielsen (PowerPalle)http://www.macnyt.dk/-------------------------------------------------------------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/ Palle Bo Nielsen

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Re: Req: Array Tags Explained, simple and clear

2004

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