#!perl -w

use strict;

my $fileopen       = $ARGV[0];
my $filesave       = $ARGV[1];

open(OUTPUT, ">$filesave");
open(INPUT, "$fileopen");

my $line;
my @riPrimGroup;
my $i;

while( <INPUT> )
   {
   # Good practice to store $_ value because
   # subsequent operations may change it.
       $line = $_;

   # Good practice to always strip the trailing
   # newline from the line.
       chomp($line);

   foreach( /^PatchMesh/ ) {
       my @data = split(/\s+/,$line);
       push(@riPrimGroup, \@data);
   }
}
close INPUT;


my @riGeo1; my @riGeo2; my @riGeo3; my @riGeo4; my @riGeo5;
        @riGeo1 = @{$riPrimGroup[0]};
        @riGeo2 = @{$riPrimGroup[1]};
        @riGeo3 = @{$riPrimGroup[2]};
        @riGeo4 = @{$riPrimGroup[3]};
        @riGeo5 = @{$riPrimGroup[4]};
        print OUTPUT "Geo1: @riGeo1\n";
        print OUTPUT "Geo2: @riGeo2\n";
        print OUTPUT "Geo3: @riGeo3\n";
        print OUTPUT "Geo4: @riGeo4\n";
        print OUTPUT "Geo5: @riGeo5\n";
        print OUTPUT "\n";
close OUTPUT;

_BEGIN_FILE_
PatchMesh "bilinear" 123 "periodic" 321 "nonperiodic" 
[ ............ array ]

PatchMesh "bilinear" 456 "periodic" 654 "nonperiodic" 
[ ............ array ]
PatchMesh "bilinear" 789 "periodic" 987 "nonperiodic"
[ ............ array ] 
PatchMesh "bilinear" 012 "periodic" 210 "nonperiodic" 
[ ............ array ]
PatchMesh "bilinear" ABC "periodic" DEF "nonperiodic" 
[ ............ array ]
PatchMesh "bilinear" GHJ "periodic" KLM "nonperiodic"
_END_FILE_ 

##</code><code>##

The above code look for a 'string' match Patchmesh
and build a array from that info.
and what I trying to do is to build a for loop by
asignment of the array.

ex.
this is the info I like to build with a for loop
        @riGeo1 = @{$riPrimGroup[0]};
        @riGeo2 = @{$riPrimGroup[1]};
        @riGeo3 = @{$riPrimGroup[2]};
        @riGeo4 = @{$riPrimGroup[3]};
        @riGeo5 = @{$riPrimGroup[4]};

so I thought about this

for ($i = 0; $i < $#riPrimGroup; $i += 1 ) {
      @riGeo$i = @{$riPrimGroup[$i]};
}

but it doesn't work, maybe a join could be used to
build the for loop and append it to the 
arrayname 'riGeo+newname'

the idea is to read in a file 'geometry data' extrate
information PatchMesh or another info and build a
ArrayName of how many PatchMesh it is find this way
I could print information about this info and build
the 'geometry' group for export to another format.

regards,
Fredrik Gustafsson