FoxTrotUniform,
Nothing like a good meditation on functional programming to clean out the OOP cobwebs in ones head. Thanks :)
You could make your build_para sub even more Haskell-ish if you removed all assignment statements as well.
sub build_para
{
return $handlers{'para'}->(join "" => map { $handlers{$_->[0]}->($
+_->[1]) } @{$_[0]});
}
But if we are really gonna get
functional, then we might as well make a generic
build_HTML sub and use more recursive datastructures.
my @test_data_2 = ( 'para', [
['none', 'The quick brown '],
['bold', 'fox'],
['none', ' jumped '],
['ital', 'over'],
['none', ' the lazy '],
['bold', 'dog'],
['none', '.']
]
);
sub build_HTML {
join "" => map {
(ref($_->[1]) eq "ARRAY") ?
$handlers{$_->[0]}->(build_HTML(@{$_->[1]}))
:
$handlers{$_->[0]}->($_->[1])
} ref($_[0]) ? @_ : ([ @_ ]);
}
print build_HTML(@test_data_2);
We could then actually use
build_HTML to compose the
build_para subroutine.
*build_para = curry(\&build_HTML, 'para');
print build_para(\@test_data);
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