Re: [WebDNA] SWITCH/CASE or SHOWIF
This WebDNA talk-list message is from 2008
It keeps the original formatting.
numero = 101492
interpreted = N
texte = FWIW, I tested both sets of code below and saw absolutely ZERO difference= in performance. -Dan On Thu, 20 Nov 2008 12:44:21 -0800 "Dan Strong"
wrote: > On Thu, 20 Nov 2008 14:53:13 -0500 > Ki Song wrote: >> We have about a 100 different brands at our store. >> Some brands have "static" brand pages (brand/index.html) while others = have "dynamic" brand pages=20 >>(dynamic.tpl?brand=3Dsomebrand). >>=20 >> 1. To go through 100 different choices, is a switch/case more efficien= t or 100 showif statements=20 >>more efficient? >=20 > My instict is that switch/case would be faster since it seems to be a "= single" operation vs 100=20 >[showif] operations, but it is untested and based on nothing but my own = buest guess. >=20 > Try a test similar to these and wrap [elapsedtime] around them or compa= re the start [time] to=20 >the end [time]: >=20 > [text]x=3D[math]ceil([RANDOM format=3Dfloat]*(100))[/math][/text] >=20 > [Switch value=3D[x]] > [loop start=3D1&end=3D100] > [Case value=3D[index]]The value of x is [x][/Case] > [/loop] > [Default] > [!]--The "default" case is probably not needed here since one of = these cases will *always*=20 > be true, but hey, I still end my [search]es w/ [/search] --[/!] > [/Default] > [/Switch] >=20 > ------------ >=20 > [text]x=3D[math]ceil([RANDOM format=3Dfloat]*(100))[/math][/text] >=20 > [loop start=3D1&end=3D100] > [showif [x]=3D[index]]The value of x is [x][/showif] > [/loop] >=20 > I'd be curious to see what the results are. >=20 >> 2. In the final generated HTML code, when 100 SHOWIF statements are pr= ocessed, but only 1 is=20 >>actually shown, the other 99 SHOWIF statements create line breaks. Is t= here a way to prevent the=20 >>line breaks from showing up if a showif does not evaluate to true? >=20 > I got this one from someone on the list: >=20 > Wrap all "line-breaky" code like this: >=20 > [getchars start=3D1&end=3D&trim=3Dboth] > [grep search=3D[%0D%0A][%0D%0A%09]*&replace=3D%0D] > ... your line-breaky code goes here ... > [/grep] > [/getchars] >=20 >>=20 >> 3. Does a SWITCH/CASE statement create line breaks for all the cases t= hat evaluate to false? >=20 > Dunno, but if so, wrap like above. > -Dan
Associated Messages, from the most recent to the oldest:
FWIW, I tested both sets of code below and saw absolutely ZERO difference= in performance. -Dan On Thu, 20 Nov 2008 12:44:21 -0800 "Dan Strong" wrote: > On Thu, 20 Nov 2008 14:53:13 -0500 > Ki Song wrote: >> We have about a 100 different brands at our store. >> Some brands have "static" brand pages (brand/index.html) while others = have "dynamic" brand pages=20 >>(dynamic.tpl?brand=3Dsomebrand). >>=20 >> 1. To go through 100 different choices, is a switch/case more efficien= t or 100 showif statements=20 >>more efficient? >=20 > My instict is that switch/case would be faster since it seems to be a "= single" operation vs 100=20 >[showif] operations, but it is untested and based on nothing but my own = buest guess. >=20 > Try a test similar to these and wrap [elapsedtime] around them or compa= re the start [time] to=20 >the end [time]: >=20 > [text]x=3D[math]ceil([RANDOM format=3Dfloat]*(100))[/math][/text] >=20 > [Switch value=3D[x]] > [loop start=3D1&end=3D100] > [Case value=3D[index]]The value of x is [x][/Case] > [/loop] > [Default] > [!]--The "default" case is probably not needed here since one of = these cases will *always*=20 > be true, but hey, I still end my [search]es w/ [/search] --[/!] > [/Default] > [/Switch] >=20 > ------------ >=20 > [text]x=3D[math]ceil([RANDOM format=3Dfloat]*(100))[/math][/text] >=20 > [loop start=3D1&end=3D100] > [showif [x]=3D[index]]The value of x is [x][/showif] > [/loop] >=20 > I'd be curious to see what the results are. >=20 >> 2. In the final generated HTML code, when 100 SHOWIF statements are pr= ocessed, but only 1 is=20 >>actually shown, the other 99 SHOWIF statements create line breaks. Is t= here a way to prevent the=20 >>line breaks from showing up if a showif does not evaluate to true? >=20 > I got this one from someone on the list: >=20 > Wrap all "line-breaky" code like this: >=20 > [getchars start=3D1&end=3D&trim=3Dboth] > [grep search=3D[%0D%0A][%0D%0A%09]*&replace=3D%0D] > ... your line-breaky code goes here ... > [/grep] > [/getchars] >=20 >>=20 >> 3. Does a SWITCH/CASE statement create line breaks for all the cases t= hat evaluate to false? >=20 > Dunno, but if so, wrap like above. > -Dan
"Dan Strong"
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:
no global [username] or [password] displayed ... (1997)
Hosting Service (1998)
Webcat & SIMS (1998)
Bug Report, maybe (1997)
[WebDNA] Version 7.x: webdna.ini and EmailerPrefs (2012)
Convert Chars Q (2000)
WebDNA / Java Chat (2004)
OR-searching (2000)
More on the email templates (I like it) (1997)
math on date? (1997)
A multi-processor savvy WebCatalog? (1997)
no time stamp & different times from emailer (1998)
encryption madness (2003)
First postarg not taking in $Commands (1997)
Re:E-mailer application times out (1998)
webmerch and serials - almost there (1997)
RE: Credit card processing - UK (1997)
[WriteFile] problems (1997)
Formatting ModDate (2000)
How far do [showif]s go? (1997)