52 lines
1.8 KiB
Perl
52 lines
1.8 KiB
Perl
package DDG::Goodie::Perimeter;
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# ABSTRACT: Compute the perimeter of basic shapes.
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use strict;
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use DDG::Goodie;
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triggers start => "perimeter", "circumference";
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zci is_cached => 1;
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zci answer_type => "perimeter";
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primary_example_queries 'circumference circle 1';
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secondary_example_queries 'perimeter hexagon 45', 'perimeter of triangle 1.5 2 3.2', 'perimeter of rectangle 1 2', 'perimeter of square 3';
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description 'find the perimeter of a geometric shape';
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name 'Perimeter';
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code_url 'https://github.com/duckduckgo/zeroclickinfo-goodies/blob/master/lib/DDG/Goodie/Perimeter.pm';
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category 'calculations';
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topics 'math';
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attribution twitter => ['crazedpsyc', 'Michael Smith'],
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cpan => ['CRZEDPSYC', 'Michael Smith'];
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handle query_lc => sub {
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if ($_ =~ m/^(?:circumference (?:of\s|)(?:circle\s|)(\d+(?:\.\d+)?))|(?:(perimeter) (?:of\s|)(?:(square|circle|pentagon|hexagon|octagon) (\d+(?:\.\d+)?)|(rectangle) (\d+(?:\.\d+)?)[,;]?\s(\d+(?:\.\d+)?)|(triangle) (\d+(?:\.\d+)?)[,;]?\s(\d+(?:\.\d+)?)[,;]?\s(\d+(?:\.\d+)?)))$/) {
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my %polygons = ("pentagon" => 5, "hexagon" => 6, "octagon" => 8);
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my $shape = $1 ? "circle" : $3 || $5 || $8;
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my $answerPrefix = "Perimeter of $shape: ";
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my $answer;
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if ($shape eq "square") {
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$answer = $4 * 4;
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} elsif ($shape eq "rectangle") {
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$answer = ($6 * 2) + ($7 * 2)
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} elsif ($shape eq "triangle") {
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$answer = $9 + $10 + $11;
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} elsif ($shape eq "circle") {
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$answerPrefix = "Circumference: ";
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$answer = (2 * 3.14159265358979323846) * ($1 || $4);
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} else {
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if (substr $shape, index($shape, "agon") eq "agon") {
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$answer = $4 * $polygons{$shape};
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}
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}
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return $answerPrefix.$answer;
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}
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return;
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};
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1;
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