my @test_data = (
    ['none', 'The quick brown '],
    ['bold', 'fox'], 
    ['none', ' jumped '],
    ['ital', 'over'],
    ['none', ' the lazy '],
    ['bold', 'dog'], 
    ['none', '.']
);

##</code><code>##

my %handlers = (
    'none' => sub {shift},
    'bold' => \&wrap_with_b_tags,
    'ital' => \&wrap_with_i_tags,
    'para' => \&wrap_with_p_tags,
);

sub build_para
{
    my ($data) = @_;

    my $text = '';

    for (@$data) {
        $text .= $handlers{$_->[0]}->($_->[1]);
    }

    return $handlers{'para'}->($text);
}

##</code><code>##

sub wrap_with_html
{
    my ($tag, $text) = @_;

    return "<$tag>$text</$tag>";
}

my %handlers = (
    'none' => sub {shift},
    'bold' => \&wrap_with_html('b', # partial funcall
    'ital' => \&wrap_with_html('i',
    'para' => \&wrap_with_html('p',
);

##</code><code>##

sub curry
{
    my ($func, @args) = @_;

    return sub {
        my (@rest) = @_;
        &$func(@args, @rest); 
    }
}

# Currying:

sub foo
{
    my ($x, $y) = @_;

    print "$x + $y = ", $x + $y, "\n";
}

my $plus_five = &curry(\&foo, 5);

&$plus_five(3);

##</code><code>##

sub curry
{
    my ($func, @args) = @_;

    return sub {
        my (@rest) = @_;
        &$func(@args, @rest);
    }
}

my %handlers = (
    'none' => sub {shift},
    'bold' => &curry(\&wrap_with_html, 'b'),
    'ital' => &curry(\&wrap_with_html, 'i'),
    'para' => &curry(\&wrap_with_html, 'p'),
);

sub wrap_with_html
{
    my ($tag, $text) = @_;

    return "<$tag>$text</$tag>";
}

sub build_para
{
    my ($data) = @_;

    my $text = '';

    for (@$data) {
        $text .= $handlers{$_->[0]}->($_->[1]);
    }

    return $handlers{'para'}->($text);
}

my @test_data = (
    ['none', 'The quick brown '],
    ['bold', 'fox'],
    ['none', ' jumped '],
    ['ital', 'over'],
    ['none', ' the lazy '],
    ['bold', 'dog'],
    ['none', '.']
);

print &build_para(\@test_data);