CSV
read CSV
use Text::CSV_XS qw[];
my $data = Text::CSV_XS::csv(
in => $tsv,
sep_char => "\t",
quote_char => q["], # undef
headers => 'auto', # undef to return ArrayRef[ArrayRef]
);
write CSV
use Text::CSV_XS qw[];
Text::CSV_XS::csv(
in => Array[HashRef],
out => 'filename.csv',
headers => [qw[field1 field2 ...]],
binary => 1,
encoding => 'UTF-8',
decode_utf8 => 0,
eol => $LF,
);