Code:
$
$ # The data file
$ cat hoh_data.txt
robert,running,10
robert,eating,20
robert,sleeping,9
robert,drinking,0
robert,work,10
tom,running,8
tom,eating,5
tom,sleeping,9
tom,drinking,1
tom,work,10
cat,running,3
cat,eating,3
cat,drinking,2
cat,work,9
peter,running,3
peter,eating,2
peter,sleeping,10
peter,drinking,0
peter,work,10
john,hiking,99
john,work,88
$
$ # The program file
$ cat -n print_hoh_1.pl
1 #!/usr/bin/perl -w
2 use strict;
3 my ($result, $name, $activities, $value, $hdr_fmt, $row_fmt);
4
5 # Subroutine section
6 sub build_hoh {
7 ($name, $activities, $value) = @_;
8 $result->{$name}->{$activities} = $value;
9 }
10
11 sub build_fmt_strings {
12 my $aref = shift;
13 $hdr_fmt = "%10s|";
14 $row_fmt = "%-10s|";
15 foreach my $i (@{$aref}) {
16 $hdr_fmt .= "%-6s|";
17 $row_fmt .= "%6s|";
18 }
19 $hdr_fmt .= "\n";
20 $row_fmt .= "\n";
21 }
22
23 sub print_hoh {
24 my @values = ();
25 my @names = sort keys %{$result};
26 # Since the activities could vary across names, loop through
27 # all activities, collect them in all_activities hash and sort
28 my %all_activities;
29 foreach my $i (keys %{$result}) {
30 foreach my $j (keys %{$result->{$i}}) {
31 $all_activities{$j}++;
32 }
33 }
34 my @activities = sort keys %all_activities;
35 # Now build the format strings and start printing
36 build_fmt_strings(\@names);
37 printf($hdr_fmt, "", @names);
38 foreach my $act (@activities) {
39 foreach my $name (@names) {
40 push(@values, $result->{$name}->{$act} // "");
41 }
42 printf($row_fmt, $act, @values);
43 @values = ();
44 }
45 }
46
47 # Main section
48 # We read the hash-of-hash data from a file and build our data structure
49 my $file = $ARGV[0];
50 open(FH, "<", $file) or die "Can't open $file: $!";
51 while (<FH>) {
52 chomp(my $line = $_);
53 build_hoh(split(/,/, $line));
54 }
55 close(FH) or die "Can't close $file: $!";
56 print_hoh;
57
$
$
$ # Run the Perl program
$ perl print_hoh_1.pl hoh_data.txt
|cat |john |peter |robert|tom |
drinking | 2| | 0| 0| 1|
eating | 3| | 2| 20| 5|
hiking | | 99| | | |
running | 3| | 3| 10| 8|
sleeping | | | 10| 9| 9|
work | 9| 88| 10| 10| 10|
$
$
$ # Now add a new name and new activity and test
$
$ echo "wendy,yelling,55" >> hoh_data.txt
$
$ perl print_hoh_1.pl hoh_data.txt
|cat |john |peter |robert|tom |wendy |
drinking | 2| | 0| 0| 1| |
eating | 3| | 2| 20| 5| |
hiking | | 99| | | | |
running | 3| | 3| 10| 8| |
sleeping | | | 10| 9| 9| |
work | 9| 88| 10| 10| 10| |
yelling | | | | | | 55|
$
$
$ # Associate the new name with an existing activity and test
$
$ echo "wendy,running,66" >> hoh_data.txt
$
$ perl print_hoh_1.pl hoh_data.txt
|cat |john |peter |robert|tom |wendy |
drinking | 2| | 0| 0| 1| |
eating | 3| | 2| 20| 5| |
hiking | | 99| | | | |
running | 3| | 3| 10| 8| 66|
sleeping | | | 10| 9| 9| |
work | 9| 88| 10| 10| 10| |
yelling | | | | | | 55|
$
$
11-18-2016
Need to print hash of hash in table format