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default blank line in end of file

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# 1  
Old 10-07-2011
default blank line in end of file
Dear Experts,
I have spent my full day looking for the solution..Smiliebut could no resolved.

Here it goes:
I have a txt file say data.txt. The content is shown below:
**************
datav1
datav2
datav3

***********
I have shown the blank line knowingly. If I open this txt file using emacs, it shows this blank line (as cursor goes there)but this lines go away if I open it using vi editor.

For my purpose this line should either be removed [which mean the cursor should stop at the last line (datav3) only ] or I should put "#" there in the end space line.

I tried "sed". It does work well but not in my case. As it does not recognize this blank line.
with single file, this can be done manually. But I need to handle 50 such files.

any help would be greatly appreciated.
thanks
pooja..
# 2  
Old 10-07-2011
Can you post output of
Code:
cat -e data.txt

Please use code tags for the output. Here is the video tutorial explaining for to do it: https://www.unix.com/how-post-unix-li...code-tags.html
# 3  
Old 10-07-2011
Hi,
Please find the output here,
****************
[lxplus426] > cat -e data.txt
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_10_1_Z8e.root$
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_11_1_5ms.root$
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_12_1_oAv.root$
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_13_1_VCv.root$
[lxplus426] >
*****************

actually, the text shown here is the real text. I simplified this in the previous mail.
Hope it is clear.
thanks
pooja
# 4  
Old 10-07-2011
There is no empty line at the end of your file. If there was, the output would look like this:
Code:
solaris% cat -e data.txt 
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_10_1_Z8e.root$
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_11_1_5ms.root$
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_12_1_oAv.root$
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_13_1_VCv.root$
$

# 5  
Old 10-07-2011
Hi,
Sorry for not using code tags, I just saw the video.
Please find the code here. Strange is I get the same result even if I go there and remove that last line manually. Smilie
Still, I am stuck. The C++ code which read this text file duplicate the last entry if I do not remove the blank space manually.

Code:
PoojaSaxena@PoojaSaxena-PC ~
$ cat -e data.txt
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_10_1_Z8e.root$
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_11_1_5ms.root$
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_12_1_oAv.root$
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_13_1_VCv.root$

PoojaSaxena@PoojaSaxena-PC ~
$

I have to do it manually for 50 files, if I do not get a solution.SmilieSmilie
pooja..

---------- Post updated at 04:46 PM ---------- Previous update was at 04:38 PM ----------

Please find the code below. One of my friend told me the wayt to check if that line is removed or not is using cat command. And here is the output.

Firstly, I did not remove blank line manually, hence using cat the terminal prompt goes to new line.
Then I opened the file and did it manually and finally again opened it using cat. you can see that the terminal prompt is with the end of the text of the file.

Does it make sense..?? Smilie

Code:
[lxplus426]  /afs/cern.ch/user/p/pooja/scratch0/CMSSW/CMSSW_4_2_7_patch1/src/Analyzer/Analyser/AnalyserCode/data  > cat data.txt
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_10_1_Z8e.root
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_11_1_5ms.root
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_12_1_oAv.root
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_13_1_VCv.root
[lxplus426] /afs/cern.ch/user/p/pooja/scratch0/CMSSW/CMSSW_4_2_7_patch1/src/Analyzer/Analyser/AnalyserCode/data > op data.txt
[lxplus426]  /afs/cern.ch/user/p/pooja/scratch0/CMSSW/CMSSW_4_2_7_patch1/src/Analyzer/Analyser/AnalyserCode/data  > cat data.txt
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_10_1_Z8e.root
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_11_1_5ms.root
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_12_1_oAv.root
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_13_1_VCv.root[lxplus426]   /afs/cern.ch/user/p/pooja/scratch0/CMSSW/CMSSW_4_2_7_patch1/src/Analyzer/Analyser/AnalyserCode/data  >

Thanks again
pooja..
# 6  
Old 10-07-2011
Code:
grep -v "^$" < input > output

will remove blank lines.

If you're putting them into one giant list, then just
Code:
cat *.ext | grep -v "^$" > outfile

to pile them together and remove all blank lines.
# 7  
Old 10-08-2011
Hi,
It does not help. It does not help. Here is the piece of code:

Code:
[lxplus311] /afs/cern.ch/user/p/pooja/scratch0/CMSSW/CMSSW_4_2_7_patch1/src/Analyzer/Analyser/AnalyserCode/data > grep -v "^$" < data.txt > file.txt
[lxplus311] /afs/cern.ch/user/p/pooja/scratch0/CMSSW/CMSSW_4_2_7_patch1/src/Analyzer/Analyser/AnalyserCode/data > cat file.txt
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_10_1_Z8e.root
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_11_1_5ms.root
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_12_1_oAv.root
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_13_1_VCv.root
[lxplus311] /afs/cern.ch/user/p/pooja/scratch0/CMSSW/CMSSW_4_2_7_patch1/src/Analyzer/Analyser/AnalyserCode/data >

For me the litmus test is to do
Code:
 $cat file.txt

if prompt comes with text (in the same line), then only that blank lines goes away. As you can find in the above code this is not the case.

To make clear what I am saying, here is the Corrected code (corrected manually):
Code:
[lxplus311] /afs/cern.ch/user/p/pooja/scratch0/CMSSW/CMSSW_4_2_7_patch1/src/Analyzer/Analyser/AnalyserCode/data > cat data.txt
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_10_1_Z8e.root
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_11_1_5ms.root
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_12_1_oAv.root
rfio:///castor/cern.ch/user/s/sudha/27Aug/data/datav1/data_13_1_VCv.root[lxplus311] /afs/cern.ch/user/p/pooja/scratch0/CMSSW/CMSSW_4_2_7_patch1/src/Analyzer/Analyser/AnalyserCode/data >

thnaks for prompt replies..
pooja..
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