I am still struggling a bit with hashes. I want to count the number of strings of the form, "FREQ <val>" in a set of files. I can see that in fact I did count the strings, just not sure how to print the results. 

  use strict;
  use warnings;
  use Env;
  use integer;
  use Data::Dumper;

  my(
    %cnt,
    $file,
    @files,
    $key,
    $line,
  );


  @files = <*.abc>;

  foreach $file (@files) {

    open   (FILE, "$file");

    my @contents=<FILE>;
    close FILE; 

    my @freqs = grep(/ FREQ /,@contents);

    foreach $line (@freqs) {

      $line =~ s/ is begin.*//;
      $line =~ s/.* FREQ/FREQ/;
      #print "$file $line";
      chomp($line);

      # start counting

      if (defined $cnt{$line}) {
        $cnt{$line}{c} = $cnt{$line}{c} + 1;
      }
      else {
        $cnt{$line}{c} = 1;
        $cnt{$line}{val} = $line;
        $cnt{$line}{file} = $file;
      }

    }

    # Print out results per file, all the found FREQs:

    # ( Definitely where I get it wrong starts here )

    for $key ( keys %($cnt->{file}) ) {

      print "key $key \n";

    }   

  }

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The intended results should be something like the following: 

file1.abc  FREQ 12.3 5
file1.abc  FREQ 5    2
file2.abc  FREQ 33.3 12

[download]

In reply to print out the values from a hash by gibsonca

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