[dba-Tech] Empty folders

Drew Wutka dbatech at wolfwares.com
Thu Sep 23 19:30:44 CDT 2004


Recursion isn't meant to go to infinity, but it is meant to run a 'tree',
where the number of branching limbs is variable.

Drew

-----Original Message-----
From: dba-tech-bounces at databaseadvisors.com
[mailto:dba-tech-bounces at databaseadvisors.com]On Behalf Of Jon Tydda
Sent: Thursday, September 23, 2004 6:22 PM
To: Discussion of Hardware and Software issues
Subject: RE: [dba-Tech] Empty folders


erm yeah, I meant something like

i= 1 to 10
do this
next i

as a loop, so that it'd do it 10 times and stop, rather than going
infinitely...


Jon

-----Original Message-----
From: dba-tech-bounces at databaseadvisors.com
[mailto:dba-tech-bounces at databaseadvisors.com]On Behalf Of Drew Wutka
Sent: 23 September 2004 17:40
To: Discussion of Hardware and Software issues
Subject: RE: [dba-Tech] Empty folders


Sort of, the key difference is the 'spawning'.  A loop just runs over and
over.  But each loop starts and ends, before the next one.

In a recursive function, you are creating 'child' processes that have to
start and finish before their parent can finish.

For instance, take a function that runs through the files and folders on
your machine:

Call1 (to C:\ -- runs all files, and calls itself for all folders
Call2 (to C:\WINNT\ -- same, but Call1 hasn't finished yet, because it
called Call2)
Call3 (to C:\WINNT\SYSTEM32\ -- now call 2 and 1 are still 'open', and this
call is 'holding them')
Call4 (to C:\WINNT\TEMP\)
......
......
Call30 (to C:\WINNT\XYZ\ when this completes, all 'parent' calls can be
closed, because it's the last folder to be hit, so now the function in Call1
can continue, which may produce another 'tree' of function calls)

Does that make sense?

Drew

-----Original Message-----
From: dba-tech-bounces at databaseadvisors.com
[mailto:dba-tech-bounces at databaseadvisors.com]On Behalf Of Jon Tydda
Sent: Thursday, September 23, 2004 10:24 AM
To: 'Discussion of Hardware and Software issues'
Subject: RE: [dba-Tech] Empty folders


I gotcha, looping in other words...


Jon

-----Original Message-----
From: Drew Wutka [mailto:dbatech at wolfwares.com]
Sent: 23 September 2004 16:18
To: Discussion of Hardware and Software issues
Subject: RE: [dba-Tech] Empty folders


LOL.  Recursion is when you have a function call itself.

Function SomeFunction()
	DoThis()
	DoThat()
	For Each Something In SomethingElse
		SomeFunction
	Next
End function

Not it will repeat itself until all elements have been used.

Drew

-----Original Message-----
From: dba-tech-bounces at databaseadvisors.com
[mailto:dba-tech-bounces at databaseadvisors.com]On Behalf Of Jon Tydda
Sent: Tuesday, September 21, 2004 9:41 AM
To: 'Discussion of Hardware and Software issues'
Subject: RE: [dba-Tech] Empty folders


It's a little bit out of my league - I just hack vba in Excel...

I hate it when you make me look words up...

Hmmn, didn't help... "Recursive: An expression, such as a polynomial, each
term of which is determined by application of a formula to preceding terms."
Polynomial? eep, maths!


Jon

-----Original Message-----
From: Drew Wutka [mailto:dbatech at wolfwares.com]
Sent: 21 September 2004 15:37
To: Discussion of Hardware and Software issues
Subject: RE: [dba-Tech] Empty folders


right a little recursive code.

Drew

-----Original Message-----
From: dba-tech-bounces at databaseadvisors.com
[mailto:dba-tech-bounces at databaseadvisors.com]On Behalf Of Jon Tydda
Sent: Tuesday, September 21, 2004 9:07 AM
To: Dba-Tech (E-mail)
Subject: [dba-Tech] Empty folders


Hi all, does anyone know of a way to find empty folders in win2k?

I'm re-ripping a lot of my cd collection, and some of the tracks/albums are
being named more correctly as the online catalogs are more up to date than
before, which is leaving me with a lot of empty folders. I have deleted the
ones in the main tree, but as for going through all the artists folders and
deleting the empty album names, that's going to be a pain... I was thinking
that there has to be an easier way to do it than just looking...


Jon


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