Find out the Diff of 2 files with column1

Vthimmap · 11-08-2012, 12:22 AM

ex: two files

file1 file2
cn va cn va
USA 6 USA 4
TWN 1 GBR 2
GRC -4 IND 0
PAK 3 PAK 5

Here the files has 2 columns. Need the difference in files with respect to column 1.

markush · 11-08-2012, 04:57 PM

You should use [code]code-tags[/code]

Could you please tell us what you've tried out so far? as you know we don't do your homework for you.

Markus

chrism01 · 11-08-2012, 05:34 PM

Here's a quick n dirty possible soln, just for fun

(in fact I knocked it up as a one liner, but its tricky to read)

Code:

for str in `cat t1.t|awk '{print $1}'`
do 
    grep $str t2.t>/dev/null 
    if [[ $? -ne 0 ]]
    then
        echo $str
    fi
done

Definitely not the best soln and it depends on exactly what you want to see as results.

Anyway, here's some good links
http://rute.2038bug.com/index.html.gz
http://tldp.org/LDP/Bash-Beginners-G...tml/index.html
http://www.tldp.org/LDP/abs/html/