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Full Discussion: Insert String every n lines, resetting line counter at desired string
Top Forums Shell Programming and Scripting Insert String every n lines, resetting line counter at desired string Post 302938537 by Skonectthedots on Tuesday 17th of March 2015 08:49:03 AM
Old 03-17-2015
Hammer & Screwdriver Insert String every n lines, resetting line counter at desired string
I need to read a text file and insert a string every n lines, but also have the line counter restart when I come across a header string.

Line repeating working every 3 lines using code:

Code:
sed '0~3 s/$/\nINSERT/g' < INPUT/PATH/FILE_NAME.txt > OUTPUT/PATH/FILE_NAME.txt

I cannot seem to find how to restart counter when line=Header... I have also tried using a shell command with much less success.

ex. input:
Header Line Here
dog
cat
fish
pony
horse
Header Line Here
whale
Header Line Here
shark
lizard
dolphin


required output:
Header Line Here
dog
cat
INSERT
fish
pony
horse
INSERT
bird
Header Line Here
whale
Header Line Here
shark
lizard
INSERT
dolphin
Last edited by Skonectthedots; 03-17-2015 at 10:11 AM.. Reason: Editing code
 

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LEARN ABOUT PHP

set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
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       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

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       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

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Version 1.23.1							  Sun Jan 8 2012						      set_color(1)
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