我正在尝试为duckduckgo开发一个即时回答的好东西。我正在使用codio并在测试代码后，当我尝试在端口5000运行web服务器时，我收到错误：
DDG::ZeroClickInfo {
Parents WWW::DuckDuckGo::ZeroClickInfo
public methods (4) : DOES, has_structured_answer, new, structured_answer
private methods (0)
internals: {
answer_type "lowest_common_multiple",
caller "DDG::Goodie::LowestCommonMultiple",
is_cached 1,
is_unsafe 0,
structured_answer {
data {
subtitle "Greatest common factor: 4, 20",
title 20
},
templates {
group "text"
}
}
}
}
Use of uninitialized value in concatenation (.) or string at /home/codio/perl5/perls/perl-5.18.2/lib/site_perl/5.18.2/App/DuckPAN/Web.pm line 484.
这是我的LowestCommonMultiple.pm
package DDG::Goodie::LowestCommonMultiple;
# ABSTRACT: Returns the Lowest Common Multiple of the two numbers entered
use strict;
use DDG::Goodie;
use Math::BigInt
zci answer_type => 'lowest_common_multiple';
zci is_cached => 1;
triggers startend => 'lcm','lowest common multiple';
handle remainder => sub {
my @numbers = grep(/^\d/, split /(?:\s|,)+/);
return unless @numbers > 1;
@numbers = sort { $a <=> $b } @numbers;
my $formatted_numbers = join(', ', @numbers);
my $result = $numbers[0] * $numbers[1] / Math::BigInt::bgcd(@numbers);
return "Lowest Common multiple of $formatted_numbers is $result.",
structured_answer => {
data => {
title => "$result",
subtitle => "Lowest common multiple: $formatted_numbers"
},
templates => {
group => "text",
}
};
};
1;