Class: Sangi::Row

Inherits:
Object
  • Object
show all
Defined in:
lib/sangi/row.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name:, sign:, cells:) ⇒ Row

Returns a new instance of Row.



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# File 'lib/sangi/row.rb', line 19

def initialize(name:, sign:, cells:)
  @name = name
  @sign = sign
  @cells = cells
  normalize_zero_sign!
end

Instance Attribute Details

#cells ⇒ Object

Returns the value of attribute cells.



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# File 'lib/sangi/row.rb', line 4

def cells
  @cells
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/sangi/row.rb', line 3

def name
  @name
end

#sign ⇒ Object

Returns the value of attribute sign.



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# File 'lib/sangi/row.rb', line 4

def sign
  @sign
end

Class Method Details

.from_integer(name:, value:, place_count:, rod_factory:) ⇒ Object 



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# File 'lib/sangi/row.rb', line 6

def self.from_integer(name:, value:, place_count:, rod_factory:)
  sign = value <=> 0
  digits = SignedNumber.from_integer(value.abs).digits
  cells = place_count.times.map do |place|
    Cell.from_digit(
      place_index: place,
      digit: digits.fetch(place, 0),
      rod_factory: rod_factory
    )
  end
  new(name: name, sign: sign, cells: cells)
end

Instance Method Details

#clone_deep ⇒ Object 



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# File 'lib/sangi/row.rb', line 43

def clone_deep
  Row.new(
    name: name,
    sign: sign,
    cells: cells.map(&:clone_deep)
  )
end

#magnitude ⇒ Object 



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# File 'lib/sangi/row.rb', line 26

def magnitude
  cells.each_with_index.sum do |cell, place_index|
    cell.value * (10**place_index)
  end
end

#normalize_zero_sign! ⇒ Object 



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# File 'lib/sangi/row.rb', line 39

def normalize_zero_sign!
  @sign = 0 if magnitude.zero?
end

#value ⇒ Object 



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# File 'lib/sangi/row.rb', line 32

def value
  current_magnitude = magnitude
  return 0 if current_magnitude.zero?

  sign * current_magnitude
end