Method: Humanize.process_decimals

Defined in:
lib/humanize/module.rb

.process_decimals(number, locale_class, locale, parts, decimals_as, spacer) ⇒ Object

rubocop:disable Metrics/ParameterLists



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# File 'lib/humanize/module.rb', line 66

def process_decimals(number, locale_class, locale, parts, decimals_as, spacer)
  # rubocop:enable Metrics/ParameterLists
  return unless number.is_a?(Float) || number.is_a?(BigDecimal)

  # Why 15?
  # (byebug) BigDecimal.new(number, 15)
  # 0.8000015e1
  # (byebug) BigDecimal.new(number, 16)
  # 0.8000014999999999e1
  decimal = BigDecimal(number, 15) - BigDecimal(number.to_i)

  _sign, significant_digits, _base, exponent = decimal.split
  return if significant_digits == "0"

  grouping = locale_class::SUB_ONE_GROUPING
  leading_zeroes = [grouping[0]] * exponent.abs
  decimals_as = :digits if leading_zeroes.any?

  decimals_as_words =
    case decimals_as
    when :digits
      digits = significant_digits.chars.map do |num|
        grouping[num.to_i]
      end

      (leading_zeroes + digits).join(spacer)
    when :number
      Humanize.format(significant_digits.to_i, locale:)
    end

  parts.insert(0, decimals_as_words, locale_class::POINT)
end