Module: Raingrams::Helpers::Random

Included in:
Model
Defined in:
lib/raingrams/helpers/random.rb

Instance Method Summary collapse

Instance Method Details

#random_gram ⇒ Object

Returns a random gram from the model.



7
8
9
10
11
 
# File 'lib/raingrams/helpers/random.rb', line 7

def random_gram
  prefix = @prefixes.keys[rand(@prefixes.length)]

  return prefix[rand(prefix.length)]
end

#random_gram_sentence(options = {}) ⇒ Object

Returns a randomly generated sentence of grams using the given options.



31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
 
# File 'lib/raingrams/helpers/random.rb', line 31

def random_gram_sentence(options={})
  grams = []
  last_ngram = @starting_ngram

  loop do
    next_ngrams = ngrams_prefixed_by(last_ngram.postfix).to_a
    last_ngram = next_ngrams[rand(next_ngrams.length)]

    if last_ngram.nil?
      return []
    else
      last_gram = last_ngram.last

      break if last_gram == Tokens.stop

      grams << last_gram
    end
  end

  return grams
end

#random_ngram ⇒ Object

Returns a random ngram from the model.



16
17
18
19
20
21
22
23
24
25
 
# File 'lib/raingrams/helpers/random.rb', line 16

def random_ngram
  prefix_index = rand(@prefixes.length)

  prefix = @prefixes.keys[prefix_index]
  table = @prefixes.values[prefix_index]

  gram_index = rand(table.grams.length)

  return (prefix + table.grams[gram_index])
end

#random_paragraph(options = {}) ⇒ Object

Returns a randomly generated paragraph of text using the given options.

options may contain the following keys:

:min_sentences

Minimum number of sentences in the paragraph. Defaults to 3.

:max_sentences

Maximum number of sentences in the paragraph. Defaults to 6.



84
85
86
87
88
89
90
91
92
93
94
 
# File 'lib/raingrams/helpers/random.rb', line 84

def random_paragraph(options={})
  min_sentences = (options[:min_sentences] || 3)
  max_sentences = (options[:max_sentences] || 6)
  sentences = []

  (rand(max_sentences - min_sentences) + min_sentences).times do
    sentences << random_sentence(options)
  end

  return sentences.join(' ')
end

#random_sentence(options = {}) ⇒ Object

Returns a randomly generated sentence of text using the given options.



57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
 
# File 'lib/raingrams/helpers/random.rb', line 57

def random_sentence(options={})
  grams = random_gram_sentence(options)
  sentence = grams.delete_if { |gram|
    gram == Tokens.start || gram == Tokens.stop
  }.join(' ')

  if @ignore_case
    sentence.capitalize!
  end

  if @ignore_punctuation
    sentence << '.'
  end

  return sentence
end

#random_text(options = {}) ⇒ Object

Returns randomly generated text using the given options.

options may contain the following keys:

:min_sentences

Minimum number of sentences in the paragraph. Defaults to 3.

:max_sentences

Maximum number of sentences in the paragraph. Defaults to 6.

:min_paragraphs

Minimum number of paragraphs in the text. Defaults to 3.

:max_paragraphs

Maximum number of paragraphs in the text. Defaults to 5.



109
110
111
112
113
114
115
116
117
118
119
 
# File 'lib/raingrams/helpers/random.rb', line 109

def random_text(options={})
  min_paragraphs = (options[:min_paragraphs] || 3)
  max_paragraphs = (options[:max_paragraphs] || 6)
  paragraphs = []

  (rand(max_paragraphs - min_paragraphs) + min_paragraphs).times do
    paragraphs << random_paragraph(options)
  end

  return paragraphs.join("\n\n")
end