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Full Discussion: comparing two fields from two different files in AWK
Top Forums Programming comparing two fields from two different files in AWK Post 302562974 by radoulov on Sunday 9th of October 2011 10:43:25 AM
Old 10-09-2011
No, this is not a Cygwin issue.

Consider the following (rigth now, I'm on Cygwin too):

This is the content of the two input files: file1 and file2:
Code:
% head file[12]
==> file1 <==
1  cust_034_60
2  cust_80_91
3  cust_406_4

==> file2 <==
cust_034_60  2
cust_406_4   3

This is what I get when I run the awk command:

Code:
% awk 'NR == FNR {
  f2[$1] = $2; next
  }
$2 in f2 {
  print $0, f2[$2]
  }' file2 file1
1  cust_034_60 2
3  cust_406_4 3

To debug further, try dumping the content of the array f2 and the content of file1:

Code:
% awk 'NR == FNR {
  f2[$1] = $2; next
  }
FNR == 1 {
  for (F in f2)
    printf "|%s| --> |%s|\n", f2[F], F
  }
{
  printf "|%s|\n", $2
  }' file2 file1
|2| --> |cust_034_60|
|3| --> |cust_406_4|
|cust_034_60|
|cust_80_91|
|cust_406_4|


Your output should be different than mine.
This User Gave Thanks to radoulov For This Post:
amarn
 

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LEARN ABOUT LINUX

xzdiff

XZDIFF(1)							     XZ Utils								 XZDIFF(1)

NAME

       xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files

SYNOPSIS

       xzcmp [cmp_options] file1 [file2]
       xzdiff [diff_options] file1 [file2]
       lzcmp [cmp_options] file1 [file2]
       lzdiff [diff_options] file1 [file2]

DESCRIPTION

       xzcmp  and xzdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options specified are passed
       directly to cmp(1) or diff(1).  If only one file is specified, then the files compared are file1 (which must have a suffix of  a  supported
       compression format) and file1 from which the compression format suffix has been stripped.  If two files are specified, then they are uncom-
       pressed if necessary and fed to cmp(1) or diff(1).  The exit status from cmp(1) or diff(1) is preserved.

       The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils.

SEE ALSO

       cmp(1), diff(1), xz(1), gzip(1), bzip2(1), zdiff(1)

BUGS

       Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified.

Tukaani 							    2010-09-27								 XZDIFF(1)
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