Module: FastUnderscore::AcronymRegex

Defined in:
lib/fast_underscore/acronym_regex.rb

Overview

Uses ActiveSupport’s ‘acronym_regex` method to construct a memoized pattern for replacing acronyms within strings that need to be underscored.

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.pattern ⇒ Object 



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# File 'lib/fast_underscore/acronym_regex.rb', line 7

def self.pattern
  return @pattern if defined?(@pattern)

  acronym_regex = ActiveSupport::Inflector.inflections.acronym_regex
  @pattern ||= /(?:(?<=([A-Za-z\d]))|\b)(#{acronym_regex})(?=\b|[^a-z])/
end

Instance Method Details

#underscore(string) ⇒ Object 



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# File 'lib/fast_underscore/acronym_regex.rb', line 14

def underscore(string)
  return string unless /[A-Z-]|::/.match?(string)

  response = string.dup
  response.gsub!(AcronymRegex.pattern) { "#{$1 && '_'}#{$2.downcase}" }

  FastUnderscore.underscore(response)
end