To: Jerry Yu... Re: [ale] 2 Perl questions ?

[Courtney Thomas]

Sriad,

I only want the 'picking' to simply be.... to merely add the file's 
sizes until >650MB, then don't add the one that puts the total >650MB 
and the 'moved-to' dir then contains that set the <=650MB, since each is 
moved to the new 'container' dir, and the program stops.

Hope that clarifies my simple objective,
Courtney


Aditya Srinivasan wrote:

> The other aspect of doing it on your own is :
> 
> The algorithm to separate files into groups <=650 sounds non trivial.
> 
> 1.List files and sizes
> 2.Sort
> 3.Pick appropriate combinations from the list (The hard part ??)
> 
> Is anyone aware of an algorithm which analyzes this sort of problem and 
> solves it ?
> Sounds like :
> 
> Given a set of n objects of different values, separate them into K
> groups such that sum of the objects of that group are less than M. 
> Optimize to minimize K
>  
> 
> Thanks,
> sriad
> 
> 
> On Wed, 15 Dec 2004, Courtney Thomas wrote:
> 
> 
>>Thanks Jerry.
>>
>>Know where I can lay hands on such an open-source program   :-)
>>
>>Cordially,
>>Courtney
>>
>>
>>Yu, Jerry wrote:
>>
>>
>>>2. you need to program it into a function/sub taking a direntry as its
>>>parameter, inside which you call itself recursively when a item is a
>>>directory
>>>1. initializing the same way you would do elsewhere in the program, "my
>>>$var1 = 1;" before use. 
>>>0. I believe there are open-source programs available to do what you try to
>>>do, unless you want to write it for fun.
>>>
>>>
>>># -----Original Message-----
>>># From: ale-bounces at ale.org [mailto:ale-bounces at ale.org]On Behalf Of
>>># Courtney Thomas
>>># Sent: Wednesday, December 15, 2004 10:28 AM
>>># To: ale at ale.org
>>># Subject: [ale] 2 Perl questions ?
>>># 
>>># 
>>># Purpose:
>>># 
>>># 	write a small program that will process all files in a 	
>>># 		designated dir, which 
>>># contains files and dirs, by examining each 	file entry and 
>>># sums it to a 
>>># total, which is less than some 			
>>># arbitrarily entered size, [in this case 
>>># <=650MB since the purpose 	is to aggregate chunks of the 
>>># original dir into 
>>># separate dirs <=650MB for burning to a CD], and if the total <=650MB, 
>>># then, move that entry into the new "burn" dir, and continue until a 
>>># total <=650MB is reached, then stop.
>>># 
>>># In this way I can take an arbitrary size dir and allocate it to any 
>>># number of burn dirs of <=650MB, then burn 'em.
>>># 
>>># --------------------------------------------------------------
>>># -----------
>>># 2 Problems:
>>># 
>>># 1-The compiler is complaining about uninitialed variables within a 
>>># "while" loop. How do I properly initialize numeric variables 
>>># within the 
>>># loop ?
>>># 
>>># 2-I also need to traverse a dir that itself contains dirs, processing 
>>># each file and dir. How do I traverse such a dir such 
>>># that....when a dir 
>>># is encountered it is entered and all the files in it are then 
>>># processed, 
>>># and if necessary drills down through other dirs [howto control depth 
>>># ?]...before returning to the original dir that contained 
>>># files and dirs ?
>>># 
>>># --------------------------------------------------------------
>>># ------------
>>># 
>>># 
>>># Appreciatively,
>>># Courtney
>>># 
>>># 
>>># 
>>># -- 
>>># s/v Mutiny
>>># Rhodes Bounty II
>>># lying Oriental, NC
>>># WDB5619
>>># 
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>>># Ale mailing list
>>># Ale at ale.org
>>># http://www.ale.org/mailman/listinfo/ale
>>># 
>>>
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>>
>>
> 


-- 
s/v Mutiny
Rhodes Bounty II
lying Oriental, NC
WDB5619