Hi all, I have 2 files: 
FILE 1

complex.1    1.356
complex.2    1.879
etc

file 2
12.02   /home/complex.2out
10.25   /home/complex.1out
etc

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i need to merge the data in file 2 to the relevant rows in file 1 based on the complex number. However, the order in file 2 is not the same as file 1. Thought hash would be useful to lookup the complex numbers. I can merge the data but how can i incorporate the values in file 1 also? 
$string = 'complex';

open(REF, "<file1");
chomp;

my %pd_file = map { /^(\S+)\s+(\S+).*/;  } <REF>;

close(REF);

open (ET, "<file2");
while (<ET>) {
   chomp;
/^(\S+\s+\S+)\s+.*($string\.\d+).*$/;
   print OUT  ($1,  $pd_file{$2}) if (exists($pd_file{$2}));

[download]
myoutput is 
complex.1  10.25
complex.2  12.02

[download]

Janitored by Arunbear - retitled from 'hash' and balanced code tag around output

In reply to How can I merge data using a hash? by Anonymous Monk

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