Faster? <shrug!> dunno, but pull up a chair. Here are the two input files.. 

$ cat file1.txt 
1
2
3
4
5

$ cat file2.txt 
5
4
3
2
1

[download]
and here's some code: 
#!/usr/bin/perl -w 
use strict;
use Tie::File;

my ($file1,$file2,$fileout)  = @ARGV;

tie my @ry1,"Tie::File",$file1 or die "$file1:$!";
tie my @ry2,"Tie::File",$file2 or die "$file2:$!";
tie my @out,"Tie::File",$fileout or die "$fileout:$!";

@out=(@ry1,@ry2);

untie @out;
untie @ry2;
untie @ry1;

[download]
which gives you this as an output: 
$ cat out.txt 
1
2
3
4
5
5
4
3
2
1

[download]

Peter L. Berghold -- Unix Professional
Peter -at- Berghold -dot- Net; AOL IM redcowdawg Yahoo IM: blue_cowdawg

In reply to Re: Join files using perl by blue_cowdawg
in thread Join files using perl by linseyr

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