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append delimeter count for each line in text file


 
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# 1  
Old 11-30-2010
delete lines in a file using sed command

Hi guys, plz tell me how to achieve this
how to delete the lines in a file using sed command

Last edited by hari908; 12-01-2010 at 01:18 PM..
# 2  
Old 11-30-2010
Code:
awk -F"|" '{$0="delcnt"NF-1"|"$0}1' input > output && mv output input

# 3  
Old 11-30-2010
Thanks , can you plz tell me how to achieve using sed command , bcoz as i dont have permissions to create a output file . all the edit/change operations should be performed on the input file itself.
# 4  
Old 11-30-2010
If your sed supports -i option, you can edit the file in place:
Code:
       -i[SUFFIX], --in-place[=SUFFIX]
              edit files in place (makes backup if extension supplied)

# 5  
Old 11-30-2010
Code:
{ rm input; awk -F"|" '{$0="delcnt"NF-1"|"$0}1'  > input; } < input

Smilie
This User Gave Thanks to danmero For This Post:
# 6  
Old 11-30-2010
What a great way of handling a file!
It does works, but I am really puzzled how shell deals with file handlers, so rm deletes the file, but it somehow exists for the awk process? It would be very interesting if someone can explain
# 7  
Old 11-30-2010
Quote:
Originally Posted by danmero
Code:
{ rm input; awk -F"|" '{$0="delcnt"NF-1"|"$0}1'  > input; } < input

Smilie
perfect.

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