Ruby: Titleize: How do I ignore smaller words like 'and', 'the', 'or, etc

Question

def titleize(string)
  string.split(\" \").map {|word| word.capitalize}.join(\" \")
end

This titleizes every single word, but how do I capture cert

Answer 1

The answer of @codenamev is not quite doing the job:

EXCLUSIONS = %w(a the and or to)
"and the answer is all good".titleize(exclude: EXCLUSIONS)
# => "And the Answer Is all Good"
                        ^^^

Exclusions should match trailing word boundaries. Here's an improved version:

# encoding: utf-8
class String
  def titleize(options = {})
    exclusions = options[:exclude]

    return ActiveSupport::Inflector.titleize(self) unless exclusions.present?
    self.underscore.humanize.gsub(/\b(['’`]?(?!(#{exclusions.join('|')})\b)[a-z])/) { $&.capitalize }
  end
end

"and the answer is all good".titleize(exclude: EXCLUSIONS)
# => "And the Answer Is All Good"
                        ^^^