How to put data from CSV file to Perl hash - perl

Question

I have Perl and CSV file with something like:
"Name","Lastname"
"Homer","Simpsons"
"Ned","Flanders"
In this CSV file I have header in the first line and in other lines there are
data.
I want to convert this CSV file to such Perl data:
[
{
Lastname => "Simpsons",
Name => "Homer",
},
{
Lastname => "Flanders",
Name => "Ned",
},
]
I've written the function that users Text::CSV and doing what I need.
Here is the sample script:
#!/usr/bin/perl
use strict;
use warnings FATAL => 'all';
use 5.010;
use utf8;
use open qw(:std :utf8);
use Text::CSV;
sub read_csv {
my ($filename) = #_;
my #first_line;
my $result;
my $csv = Text::CSV->new ({ binary => 1, auto_diag => 1 });
open my $fh, "<:encoding(utf8)", $filename or die "$filename: $!";
while (my $row = $csv->getline ($fh)) {
if (not #first_line) {
#first_line = #{$row};
} else {
push #{$result}, { map { $first_line[$_] => $row->[$_] } 0..$#first_line };
}
}
close $fh;
return $result;
}
my $data = read_csv('sample.csv');
This works fine but this function I want to use in several scripts. I'm
greatly suprised that Text::CSV doesn't have this feature.
My question. What should I do to simplify solving such tasks in the future for
me and others?
Should I use some Perl module from CPAN, should I try to add this function to
Text::CSV, or something else?

Answer 1

Huh? Why so complicated? First, we fetch the header outside of the loop:
my $headers = $csv->getline($fh) or die "no header";
Assign these to be the column names:
$csv->column_names(#$headers);
Then, each call to getline_hr will provide a hashref:
while (my $hashref = $csv->getline_hr($fh)) {
push #$result, $hashref;
}
We can also use getline_hr_all:
$result = $csv->getline_hr_all($fh);
In other words, it ain't complex, most pieces are already provided by Text::CSV, and it can be done in very few lines.
Also, a module like this seems to already exist: Text::CSV::Slurp. (note: reverse dependency search through metacpan is awesome)

Answer 2

It's probably not a standard feature because different people will want their CSV files parsed into different data structures.
Why not create your own module that wraps this function?
package CSVRead;
use strict;
use warnings;
use 5.010;
use open qw(:std :utf8);
use Text::CSV;
require Exporter;
our #ISA = qw(Exporter);
our #EXPORT = qw(read_csv);
sub read_csv {
my ($filename) = #_;
my #first_line;
my $result;
my $csv = Text::CSV->new ({ binary => 1, auto_diag => 1 });
open my $fh, "<:encoding(utf8)", $filename or die "$filename: $!";
while (my $row = $csv->getline ($fh)) {
if (not #first_line) {
#first_line = #{$row};
} else {
push #{$result}, { map { $first_line[$_] => $row->[$_] } 0..$#first_line };
}
}
close $fh;
return $result;
}
Then, use it like this:
#!/usr/bin/perl
use strict;
use warnings;
use 5.010;
use Data::Dumper;
use CSVRead;
my $data = read_csv('sample.csv');
say Dumper $data;