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Class: ActiveSupport::NumberHelper::RoundingHelper

Do not use. This class is for internal use only.
Relationships & Source Files
Inherits: Object
Defined in: activesupport/lib/active_support/number_helper/rounding_helper.rb

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(options) ⇒ RoundingHelper

[ GitHub ] 

  


# File 'activesupport/lib/active_support/number_helper/rounding_helper.rb', line 8



def initialize(options)
  @options = options
end


  







Instance Attribute Details



  

    #options   (readonly)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/number_helper/rounding_helper.rb', line 6



attr_reader :options


  







Instance Method Details



  

    #absolute_precision(number)   (private)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/number_helper/rounding_helper.rb', line 37



def absolute_precision(number)
  if options[:significant] && options[:precision] > 0
    options[:precision] - digit_count(convert_to_decimal(number))
  else
    options[:precision]
  end
end


  








  

    #convert_to_decimal(number)   (private)
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/number_helper/rounding_helper.rb', line 26



def convert_to_decimal(number)
  case number
  when Float, String
    BigDecimal(number.to_s)
  when Rational
    BigDecimal(number, digit_count(number.to_i) + options[:precision])
  else
    number.to_d
  end
end


  








  

    #digit_count(number)  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/number_helper/rounding_helper.rb', line 20



def digit_count(number)
  return 1 if number.zero?
  (Math.log10(number.abs) + 1).floor
end


  








  

    #round(number)  
  

  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/number_helper/rounding_helper.rb', line 12



def round(number)
  precision = absolute_precision(number)
  return number unless precision

  rounded_number = convert_to_decimal(number).round(precision, options.fetch(:round_mode, :default).to_sym)
  rounded_number.zero? ? rounded_number.abs : rounded_number # prevent showing negative zeros
end