Class: VaderSentimentRuby::Checker::ButWordNegationChecker

Inherits:
Object
  • Object
show all
Defined in:
lib/vader_sentiment_ruby/checker/but_word_negation_checker.rb

Overview

Checks for modification in sentiment due to contrastive conjunction ‘but’

Instance Method Summary collapse

Constructor Details

#initialize(words_and_emoticons, sentiments) ⇒ ButWordNegationChecker

Returns a new instance of ButWordNegationChecker.



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# File 'lib/vader_sentiment_ruby/checker/but_word_negation_checker.rb', line 7

def initialize(words_and_emoticons, sentiments)
  @words_and_emoticons_lower = words_and_emoticons.map { |w| w.to_s.downcase }
  @sentiments = sentiments
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/vader_sentiment_ruby/checker/but_word_negation_checker.rb', line 12

def call
  return @sentiments unless @words_and_emoticons_lower.include?('but')

  but_index = @words_and_emoticons_lower.index('but')
  updated_sentiments = []
  @sentiments.each_with_index do |sentiment, senti_index|
    updated_sentiments << modified_sentiment(sentiment, senti_index, but_index)
  end

  updated_sentiments
end