Class: Tuwaga

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(base = 10, symbols = nil) ⇒ Tuwaga

Returns a new instance of Tuwaga.



4
5
6
7
8
9
10
11
12
13
 
# File 'lib/tuwaga.rb', line 4

def initialize base = 10, symbols = nil
  @base = base
  validate_base

  @symbols = blank?(symbols) ? guess_symbols : symbols.split('')
  validate_symbols

  @symbol_value_map = {}
  @symbols.each_with_index { |item, index| @symbol_value_map[item] = index }
end

Instance Attribute Details

#base ⇒ Object (readonly)

Returns the value of attribute base.



2
3
4
 
# File 'lib/tuwaga.rb', line 2

def base
  @base
end

#symbol_value_map ⇒ Object (readonly)

Returns the value of attribute symbol_value_map.



2
3
4
 
# File 'lib/tuwaga.rb', line 2

def symbol_value_map
  @symbol_value_map
end

#symbols ⇒ Object (readonly)

Returns the value of attribute symbols.



2
3
4
 
# File 'lib/tuwaga.rb', line 2

def symbols
  @symbols
end

Instance Method Details

#convert_from(value, number_base) ⇒ Object 



50
51
52
53
54
55
 
# File 'lib/tuwaga.rb', line 50

def convert_from value, number_base
  raise 'Value must be a String' if (!value.is_a?(String))
  raise 'Number_base must be an instance of Tuwaga' if (!number_base.is_a?(Tuwaga))

  from_decimal(number_base.to_decimal(value))
end

#convert_to(value, number_base) ⇒ Object 



43
44
45
46
47
48
 
# File 'lib/tuwaga.rb', line 43

def convert_to value, number_base
  raise 'Value must be a String' if (!value.is_a?(String))
  raise 'Number_base must be an instance of Tuwaga' if (!number_base.is_a?(Tuwaga))

  number_base.from_decimal(to_decimal(value))
end

#from_decimal(input) ⇒ Object 



28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# File 'lib/tuwaga.rb', line 28

def from_decimal input
  raise 'Input must be an integer' if (!input.is_a?(Integer))

  return @symbols[0] if input == 0

  result = ''
  in_decimal = input
  while (in_decimal > 0) do
    result = @symbols[in_decimal % @base] + result
    in_decimal = in_decimal / @base
  end

  result
end

#to_decimal(input) ⇒ Object 



15
16
17
18
19
20
21
22
23
24
25
26
 
# File 'lib/tuwaga.rb', line 15

def to_decimal input
  raise 'Input must be a string' if (!input.is_a?(String))

  result = 0
  power = 0
  input.split('').reverse.each do |char|
    result += @symbol_value_map[char] * (@base ** power)
    power += 1
  end

  result
end