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[solved] Trailing spaces

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# 1  
Old 07-13-2010
Data [solved] Trailing spaces
Hello People

How to check whether lines in a text file have trailing spaces or not and if a line have trailing spaces then how many trailing spaces line have?


Regards
ARvind kumar
# 2  
Old 07-13-2010
How about:

Code:
[house@leonov] a="some text   "; b=$( echo "$a" | sed 's/[ ]*$//' ); c=$(( ${#a} - ${#b} )); echo "$c"
3

# 3  
Old 07-13-2010
Code:
awk '/ $/ {print length - match($0, / +$/) + 1, $0}' file

This User Gave Thanks to Scott For This Post:
arvindk.monu
# 4  
Old 07-13-2010
Hi Scottn Can you please briefly explain your solution..as i am not able to understand the solution properly provided by you or can you give me some link so that i can understand it .Thanks in Advance
# 5  
Old 07-13-2010
Quote:
Originally Posted by arvindk.monu
Hi Scottn Can you please briefly explain your solution..as i am not able to understand the solution properly provided by you or can you give me some link so that i can understand it .Thanks in Advance
It finds lines ending with a space (/ $/), and prints the number of spaces at the end of the line by subtracting the position of the first or all space at the end of the line (match($0, / +$/) from the length of the line itself ( length).

The best place to start is the awk man page. (if I'd have done that(!) the solution might have been easier):

Quote:
match(s, r)
the position in s where the regular expression r occurs, or 0 if it does not. The variables RSTART and
RLENGTH are set to the position and length of the matched string.
This User Gave Thanks to Scott For This Post:
arvindk.monu
# 6  
Old 07-14-2010
Thanks Scottn,now i understand this.My problem is solved now.Thanks a lot sir.and please tell me how to mark it as solved and close.
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