Module: VV::NumericMethods

Included in:
Numeric
Defined in:
lib/vv/numeric_methods.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/vv/numeric_methods.rb', line 4

def self.included(base)
  base.extend(ClassMethods)
end

Instance Method Details

#imaginary? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/vv/numeric_methods.rb', line 16

def imaginary?
  ! ( self.imaginary == 0 )
end

#readable_number(precision: 3, significant: false) ⇒ Object Also known as: readable 



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# File 'lib/vv/numeric_methods.rb', line 25

def readable_number precision: 3, significant: false
  message = "Cannot make imaginary number readable"
  fail message if imaginary?

  _int_digits,
  _remaining_digits = self.real_digits.split String.period

  _int_digits = \
  _int_digits.after String.dash, safe: false

  if _int_digits.size > 4
    # TODO: This type of pattern comes up all the time with
    #       strings. Figure out a way of abstracting it.
    offset   = ( _int_digits.size ) % 3
    required = ( _int_digits.size - 1 ) / 3

    index = required * 3 + ( offset % -3 )
    while index > 0
      _int_digits.insert(index, String.comma)
      index -= 3
    end
  end

  response = \
  real.negative? ? String.dash : String.empty_string

  response += _int_digits
  return response unless _remaining_digits
  response += String.period

  last_digit = significant ? -1 : ( precision )
  if significant || precision >= _remaining_digits.size
    dec_portion = _remaining_digits
  else
    dec_portion = \
    ( _remaining_digits[0..last_digit].to_f / 10 )
    .round.to_s
  end

  response + dec_portion
end

#real_digits ⇒ Object 



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# File 'lib/vv/numeric_methods.rb', line 20

def real_digits
  return real.to_digits if real.respond_to? :to_digits
  real.to_s
end