Class: Wikipedia::VandalismDetection::Features::CommentMarkupFrequency

Inherits:
Base
  • Object
show all
Defined in:
lib/wikipedia/vandalism_detection/features/comment_markup_frequency.rb

Overview

This feature computes frequency of markup words in the comment of the edit’s new revision.

Instance Method Summary collapse

Methods inherited from Base

#count

Instance Method Details

#calculate(edit) ⇒ Object

Returns the percentage of markup words in the new revision’s comment. Returns 0.0 if text is of zero length.



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# File 'lib/wikipedia/vandalism_detection/features/comment_markup_frequency.rb', line 13

def calculate(edit)
  super

  comment = edit.new_revision.comment
  all_words_count = comment.split.count

  regex = /(#{WordLists::MARKUP.join('|')})/
  markup_words_count = comment.scan(regex).count

  (all_words_count > 0) ? (markup_words_count.to_f) / (all_words_count.to_f) : 0.0
end