I'd think the only 'danger' in the brute force approach is that if
vContainer were very big, and there were many items in vInputStrings,
it would probably be slow due to the sheer amount of copying going on.
If that were the case, then maybe iterating over the lines of
vContainer might be more efficient, since large chunks of data would
not be copied.
repeat for each line thisLine in vContainer
repeat for each item thisItem in vInputStrings
get thisLine
filter it without ("*!*" & thisItem & "*!*")
if it is not empty then
put it & cr after vNewContainer
exit repeat -- no need for further tests on thisLine
end if
end repeat
end repeat
This is not tested, might be even slower!
Best,
Mark
On 25 Oct 2006, at 21:54, Mark Powell wrote:
Thanks to both Jim and Marielle for their awesome feedback.
Instead of
asking specific questions about the details of your feedback, I
want to
ask a general performance question. The filter does work within a
repeat loop like this:
repeat for each item thisItem in vInputStrings
get vContainer
filter it with ("*!*" & thisItem & "*!*")
put cr & it after vNewContainer
end repeat
...do something with vNewContainer
But given that vInputStrings could be very large, my concern is
that the
getting and putting involved would be dangerously memory- or
processor-intensive. What are the risks you have seen with the brute
force approach like the one above?
Mark
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Mark
Powell
Sent: Wednesday, October 25, 2006 10:04 AM
To: [email protected]
Subject: Multiple arguments with the filter command
Another text filtering question, please. I have studied the archives
but have not found precisely the solution that works.
I have a container vContainer of file names, each line of the form
<directory>/!?!<filename>!/<filesize>/<creationdate>
Here are three literal examples:
C:/The World/Asia/!?!prologue.ps!/1026/1115309596
C:/The World/Europe/!?!Map of Europe.jpg!/3536844/1155845730
C:/The World/!?!About1953.txt!/4288/1161776573
User-input text strings can define what files from vContainer are
to be
retained. The following works to filter-in the first example above:
filter vContainer with ("*!*.ps*!*")
However, if the user wants both ".ps" and "Europe" to be retained, how
best to do it without repeat loops and a lot of temporary copies of
vContainer? Is there a way?
One catch is that if the user inputs something like "53", the
operation
must recognize the fact that the "53" in the first two examples is
not a
part of the file name, thereby filtering them out, but that "53" is a
part of the file name in the third example, thereby filtering it in.
This is one reason for the exclamation point tokens in vContainer.
Any ideas greatly appreciated.
Mark Powell
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