52 lines
1.0 KiB
Raku
52 lines
1.0 KiB
Raku
package DDG::Goodie::Average;
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use DDG::Goodie;
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triggers startend => "avg", "average", "mean", "median";
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zci is_cached => 1;
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zci answer_type => "average";
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handle query_parts => sub {
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my @nums;
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for (@_) {
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if ($_ =~ /-?\d+/) {
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$_ =~ s/[;,]//g;
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push @nums, $_;
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}
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}
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return unless @nums;
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# initialize the sum
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my $sum;
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# calculate the sum
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$sum += $_ for @nums;
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# get the length of the array
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my $len = @nums;
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# calculate the mean
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my $mean = $sum/$len;
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# sort the list numerically, least to greatest
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@nums = sort { $a <=> $b } @nums;
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my $med;
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if ($len % 2 eq 0) {
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# get the two middle numbers, since the
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# length is even, and calculate their mean
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$med = ($nums[$len/2] + $nums[$len/2-1])/2;
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} else {
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# get the middle number
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$med = $nums[int($len/2)]
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}
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my $rms;
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$rms += ($_ ** 2) for @nums;
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$rms /= $len;
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$rms = sqrt $rms;
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return "Mean: $mean\nMedian: $med\nRoot Mean Square: $rms";
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};
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1;
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