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how to find the shortest line which containing a key string?


 
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# 1  
Old 03-01-2012
how to find the shortest line which containing a key string?

hi all,

suppose a key string: M0271857

and to find all lines containing this key string in a text file

which returns multiple lines

but i only want the shortest one

is there a way to do that?

thanks so much!
# 2  
Old 03-01-2012
Code:
awk '/M0271857/ && ((!L) || (length(L)>length($0))) { L=$0 } END { print L }' datafile

Meaning:

Code:
/M0271857/ # for all lines where your string matches
&& ((!L) || (length(L)>length($0))) # ...and L is undefined or longer than the line
{ L=$0 } # Set L to the entire line
END { print L } # After all lines are processed, print the shortest one found

This User Gave Thanks to Corona688 For This Post:
# 3  
Old 03-01-2012
Hi,
Try this,
Code:
awk '/M0271857/{l=length($0);if(min==""){min=l;r=$0;}else{if(l<min){min=l;r=$0;}}}END{print r;}' file

Cheers,
Ranga:-)

Last edited by rangarasan; 03-01-2012 at 04:04 PM..
This User Gave Thanks to rangarasan For This Post:
# 4  
Old 03-01-2012
Quote:
Originally Posted by Corona688
Code:
awk '/M0271857/ && ((!L) || (length(L)>length($0))) { L=$0 } END { print L }' datafile

Meaning:

Code:
/M0271857/ # for all lines where your string matches
&& ((!L) || (length(L)>length($0))) # ...and L is undefined or longer than the line
{ L=$0 } # Set L to the entire line
END { print L } # After all lines are processed, print the shortest one found

Hi, thank you for the reply.
i found that if there are two lines which are both the shortest, nothing is returned. is there a way to solve this?
thanks!
# 5  
Old 03-01-2012
Not true for the data I had.

Please post your actual input string and input file. It may be taking some of them to be special characters.

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