Show numeric digit in your language

My previous post was about a Ruby on Rails plugin I wrote to convert any numeric digit to other languages' representations. Here is the internals; how that works.

That plugin converts a whole string character by character. To add any language, just add that language's digits to "NUMERIC_LOCALIZE_MAP" hash.

NUMERIC_LOCALIZE_MAP = {
 'bn' =>  ["০","১","২","৩","৪","৫","৬","৭","৮","৯"],
 'hi' => ["०","१","२","३","४","५","६","७","८","९"],
 'ar' => ["٠", "١","٢","٣","٤","٥","٦","٧","٨","٩"]
}

def localize_numeric(source, locale_code = nil)
  string_representation = source
result_string = nil

if locale_code && NUMERIC_LOCALIZE_MAP.include?(locale_code)
  result_string = string_representation.gsub(/\d/){|digit|
    NUMERIC_LOCALIZE_MAP[locale_code][digit.to_i]
  }
else
  result_string = string_representation
end
result_string
end