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Perl: compare columns of two files

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# 1  
Old 12-04-2011
Perl: compare columns of two files
Hi

I have file 1 like this:
Quote:
1 xxx kkok
2 sss polld
3 erere plroe
4 dfdfd erer
file 2 is like this:
Quote:
1 ffe +
3 rre +
4 ffgg -
The files are tab separated. I want to search for the first column values of file 1 in the first column of file 2 and merge the 3rd column value of file 2 to the corresponding line on first file.

so the desired output is;
Quote:
1 xxx kkok +
3 erere plroe +
4 dfdfd erer -
I tried following perl code but is not working

PHP Code:
open file2, "$ARGV[0]" || die "cant open file";
open file1, "$ARGV[1]" || die "cant open file";

my $x;
my $y;
my $z;
my %sf = ();
while (<file2>) {
  ($x, $y, $z) = split;
  $sf{$x} = $z;
  }
while (<file1>) {
  ($a, ) = split; 
  if (exists $sf{$a}) { print "$_\t$sf{$x}\n"}} 
can some one help? thanks in advance
Last edited by polsum; 12-04-2011 at 07:12 PM..
# 2  
Old 12-04-2011
Does it have to be Perl?
Code:
join -j1 -o1.1,1.2,1.3,2.3 file1 file2

# 3  
Old 12-05-2011
thnak you bartus, it is working great....Smilie
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