[vox-tech] Regular expression help

[David Spencer]

Harold, that's perfect. Just what I needed!

Thanks so much,

-- Dave Spencer, PageWeavers

On Jun 30, 2010, at 3:16 PM, Harold Lee wrote:

> Take 2:
> 
> perl -n -e 'chomp; if(/([^ ]+)$/) { print "rm -f $1\n"; }' < files-to-delete.txt
> 
> -n will loop over the input lines like -p but it won't echo the input
> lines. Chomp will remove the newlines. Adding the "if" makes sure we
> don't print "rm -f" for empty lines or lines that don't match.
> 
> Then you have your rm commands and you can scan them for correctness.
> 
> Harold
> 
> On Wed, Jun 30, 2010 at 3:13 PM, Harold Lee <harold at hotelling.net> wrote:
>> If none of the filenames contain spaces(!), you can write a regexp to
>> match the end of the line using the $ anchor, e.g.
>> 
>> perl -p -e '/([^ ]+)$/; print "rm -f $1\n";' < files-to-delete.txt
>> 
>> Harold
>> 
>> On Wed, Jun 30, 2010 at 3:01 PM, David Spencer, Internet Handyman
>> <spencer at pageweavers.com> wrote:
>>> Guys, I'm sorry about asking this on the list; but I seem to have a mental
>>> block when it comes to regular expressions. Here's what I'm trying to do:
>>> 
>>> I have a lot of directories with a vast number of files, some of which I wish
>>> to delete based on the month they were created. I've built a file from some
>>> full directory listings that has all the files I wish to delete. (Just go with
>>> me on this and don't suggest alternative methods of performing the task - I'm
>>> simplfying the job so it can be explained more easily.)
>>> 
>>> A snippet of the file would look like this:
>>> 
>>> -rw-------  1 auser auser 3.7K Apr 12 10:11 auser/folder/new/127109228.file
>>> -rw-------  1 auser auser  16K Apr 12 12:32 auser/folder/new/127110076.file
>>> 
>>> I would like to write either single-line perl command or a nano search and
>>> replace to substitute the directory info and replace it with a file delete
>>> so it would look like this:
>>> 
>>> rm -f auser/folder/new/127109228.file
>>> rm -f auser/folder/new/127110076.file
>>> 
>>> Then I can just execute converted directory file as a shell script and
>>> delete my files. But I'm having a brain-freeze on what a valid regex would
>>> look like to match. Help??
>>> 
>>> Thanks again,
>>> 
>>> 
>>> -- Dave Spencer, PageWeavers
>>> _______________________________________________
>>> vox-tech mailing list
>>> vox-tech at lists.lugod.org
>>> http://lists.lugod.org/mailman/listinfo/vox-tech
>>> 
>> 
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