08-16-2006
So if I understand it, you might have a file like this:
--- filename ---
file1 10
file2 20
file3 30
file4 40
---------------
Say I want to get the word count of each file and print next to it the corresponding 10, 20, 30, or 40..
~$ cat filename | while read line; do x=`echo $line | awk '{print $1}'`; y=`echo $line | awk '{print $2}'`; echo `wc -l $x` $y; done
6 file1 10
46 file2 20
8 file3 30
87 file4 40
Another way uses awk:
~$ cat filename | while read line; do a=`echo $line | awk '{print "b="$1,"c="$2}'`; eval $a; echo `wc -l $b` $c;done
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DIFF3(1) General Commands Manual DIFF3(1)
NAME
diff3 - 3-way differential file comparison
SYNOPSIS
diff3 [ -ex3 ] file1 file2 file3
DESCRIPTION
Diff3 compares three versions of a file, and publishes disagreeing ranges of text flagged with these codes:
==== all three files differ
====1 file1 is different
====2 file2 is different
====3 file3 is different
The type of change suffered in converting a given range of a given file to some other is indicated in one of these ways:
f : n1 a Text is to be appended after line number n1 in file f, where f = 1, 2, or 3.
f : n1 , n2 c Text is to be changed in the range line n1 to line n2. If n1 = n2, the range may be abbreviated to n1.
The original contents of the range follows immediately after a c indication. When the contents of two files are identical, the contents of
the lower-numbered file is suppressed.
Under the -e option, diff3 publishes a script for the editor ed that will incorporate into file1 all changes between file2 and file3, i.e.
the changes that normally would be flagged ==== and ====3. Option -x (-3) produces a script to incorporate only changes flagged ====
(====3). The following command will apply the resulting script to `file1'.
(cat script; echo '1,$p') | ed - file1
FILES
/tmp/d3?????
/usr/lib/diff3
SEE ALSO
diff(1)
BUGS
Text lines that consist of a single `.' will defeat -e.
Files longer than 64K bytes won't work.
DIFF3(1)