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Re: newby stupid question - cat mutiple files to new piped output files

On Wed, 26 Nov 2003, Ronald Landheer-Cieslak wrote:

> On Wed, Nov 26, 2003 at 04:55:34AM -0500, c wrote:
> > Just started to get somewhere until i wanted to cat a heap of csv files and
> > then send the unique records to a new file.
> > I thought it couldnt be to hard but now my brain hurts.
> > Can anyone help me with a line of code that will do the command below
> > '$ cat d:/pc1/filename.csv |uniq > d:/pc1/newfilename.csv'
> > but i want it do it repeatidly for every .csv file in that directory?
> This has nothing to do with Cygwin, but hey..
> for i in /cygdrive/d/pc1/*.csv; do
> cat $i | uniq > /cygdrive/d/pc1/newfilename.csv
> done

Umm, surely you meant

	cat /cygdrive/d/pc1/*.csv | sort | uniq > /cygdrive/d/pc1/newfilename.csv


Or, at the very least,

	for i in /cygdrive/d/pc1/*.csv; do
	  cat $i | uniq >> /cygdrive/d/pc1/newfilename.csv

The goals of the OP weren't very clearly stated, so he might have wanted
to do

	for i in /cygdrive/d/pc1/*.csv; do
	  cat $i | uniq > /cygdrive/d/pc1/new$i.csv


> This will work once, because the new files won't be there yet. After
> that, the *.csv will pick up the new files as well..
> Take a look at the "Advanced Bash scripting guide" which you can find at
> for info on how to do this kind of thing correctly..
> rlc

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