Class: Wikipedia::VandalismDetection::Features::MarkupFrequency

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

Overview

This feature computes frequency of bad words in the inserted text.

Instance Method Summary collapse

Methods inherited from Base

#count

Instance Method Details

#calculate(edit) ⇒ Object

Returns the percentage of markup related words in the inserted text. Returns 0.0 if inserted clean text is of zero length.



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

def calculate(edit)
  super

  text = edit.inserted_text
  all_words_count = edit.inserted_words.count

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

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