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Full Discussion: Printing all combinations : Awk
Top Forums Shell Programming and Scripting Printing all combinations : Awk Post 302200105 by aigles on Wednesday 28th of May 2008 12:01:27 PM
Old 05-28-2008
Try the following script :
Code:
$ cat comb.sh
awk '
{
   file_count++;
   rec_num = 0;
   while (getline rec <$0)
     records[file_count, ++rec_num] = rec;
   close($0);
   records[file_count, "count"] = rec_num;
}

function comb_file(file_num, rec     ,rec_count ,r) {
   if (file_num > file_count) {
      print rec;
   } else {
      rec_count = records[file_num, "count"];
      for (r=1; r<=rec_count; r++)
         comb_file(file_num+1, rec (file_num>1 ? "|" : "") records[file_num, r]);
   }
}

END {
   rec = "";
   comb_file(1, rec);
}

' file_order.txt
$

Input files:
Code:
$ cat file_order.txt
file_1.txt
file_2.txt
file_3.txt
$ cat file_1.txt
F1.1
F1.2
F1.3
$ cat file_2.txt
F2.1
F2.2
$ cat file_3.txt
F3.1
F3.2
F3.3
F3.4
$

Output :
Code:
$ comb.sh
F1.1|F2.1|F3.1
F1.1|F2.1|F3.2
F1.1|F2.1|F3.3
F1.1|F2.1|F3.4
F1.1|F2.2|F3.1
F1.1|F2.2|F3.2
F1.1|F2.2|F3.3
F1.1|F2.2|F3.4
F1.2|F2.1|F3.1
F1.2|F2.1|F3.2
F1.2|F2.1|F3.3
F1.2|F2.1|F3.4
F1.2|F2.2|F3.1
F1.2|F2.2|F3.2
F1.2|F2.2|F3.3
F1.2|F2.2|F3.4
F1.3|F2.1|F3.1
F1.3|F2.1|F3.2
F1.3|F2.1|F3.3
F1.3|F2.1|F3.4
F1.3|F2.2|F3.1
F1.3|F2.2|F3.2
F1.3|F2.2|F3.3
F1.3|F2.2|F3.4
$

Jean-Pierre.
 

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set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

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       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

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