[SOLVED] [bash - sed - awk] Match line with x characters and add string

TigerClaw · 02-27-2012, 10:16 AM

Hello,

I tried to find a way using the length() function of awk with no success.
I would like to add a string to the beginning or the end of a line that contains less than x character and more than Y characters

Example

Code:

Line:
This line contains less than 100 characters and more than 10
Result:
<string>This line contains less than 100 characters and more than 10
Or
This line contains less than 100 characters and more than 10</string>

Thanks!

Edit: inserted CODE tags

David the H. · 02-27-2012, 10:27 AM

Please use [code][/code] tags around your code and data, to preserve formatting and to improve readability. Please do not use quote tags, colors, or other fancy formatting.

It might help if you posted your non-working attempts too, so we can help point out where you're going wrong.

Awk can certainly do it, but I'm not going to bother with it right now. I will post a simple bash solution, however.

Code:

x=10
y=100

while read line; do

	ln=${#line}

	if (( ln > x && ln < y )); then
		echo "FOO $line"
	else
		echo "$line"
	fi

done <file.txt

grail · 02-27-2012, 11:51 AM

Not sure how you could have got stuck??

Code:

awk 'length > 10 && length < 100{print $0,"<string>"}' file

And you can use -v to set variables if required.

TigerClaw · 02-27-2012, 03:06 PM

Thanks both solutions works perfectly.

Sorry if my original question was not formulated in the right way, I'll try to do better next time.

grail · 02-28-2012, 12:22 AM

Please mark as SOLVED once you have a solution