Class: NAdicNumber::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/n_adic_number/base.rb

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(seed) ⇒ Base

Returns a new instance of Base.



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# File 'lib/n_adic_number/base.rb', line 24

def initialize(seed)
  raise "Not define map_table" unless base_num

  case seed
  when Integer
    raise ArgumentError if seed < 0
    @integer = seed
  when String
    @str_chars = seed.reverse.chars
    raise ArgumentError if @str_chars.one?{|ch| !reverse_map.has_key?(ch)}
    @string = seed
  else
    raise ArgumentError
  end
end

Class Attribute Details

.base_num ⇒ Object (readonly)

Returns the value of attribute base_num.



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# File 'lib/n_adic_number/base.rb', line 4

def base_num
  @base_num
end

.map_table ⇒ Object (readonly)

Returns the value of attribute map_table.



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# File 'lib/n_adic_number/base.rb', line 4

def map_table
  @map_table
end

.reverse_map ⇒ Object (readonly)

Returns the value of attribute reverse_map.



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# File 'lib/n_adic_number/base.rb', line 4

def reverse_map
  @reverse_map
end

Class Method Details

.keta(pos) ⇒ Object 



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# File 'lib/n_adic_number/base.rb', line 19

def keta(pos)
  @keta[pos] ||= @base_num ** pos
end

.mapping(ary) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/n_adic_number/base.rb', line 6

def mapping(ary)
  raise ArgumentError, "map_table is not Array" unless ary.is_a?(Array)
  raise ArgumentError, "map_table is empty" if ary.empty?
  raise ArgumentError, "map_table is not unique" if ary.uniq!

  @map_table = ary
  @base_num = ary.size
  @reverse_map = {}
  ary.each_with_index{|ch,i| @reverse_map[ch] = i}
  @keta = (0..9).map{|i| @base_num ** i}
  nil
end

Instance Method Details

#inspect ⇒ Object 



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# File 'lib/n_adic_number/base.rb', line 55

def inspect
  %Q|#<#{self.class.name}:0x#{"%014x" % (self.object_id << 1)} base:#{base_num} num:#{to_s} integer:#{to_i}>|
end

#to_i ⇒ Object 



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# File 'lib/n_adic_number/base.rb', line 44

def to_i
  @integer ||= make_integer
end

#to_s ⇒ Object 



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# File 'lib/n_adic_number/base.rb', line 40

def to_s
  @string ||= make_string
end