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Old 01-17-2007, 04:15 PM   #1
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Insert after every nth character using sed


I am trying to figure out how to use sed to insert something after n characters.

I have a cgi script that outputs its progress to the browser using periods. I want to put a </br> tag every 100 or so periods to stop browsers from improperly displaying my table.

So how do I use sed to insert something after every 100th period?

Old 01-17-2007, 06:41 PM   #2
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Maybe something like this
sed 's/\./&\<\/br\>/100' file.txt
Old 01-17-2007, 06:59 PM   #3
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sed is operating on each line of input, so if you want to use this in a pipeline, waiting until n characters have been written where there are not newlines between the characters, sed is not suitable.


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