Module: CharshiftHelper

Defined in:
lib/charshifthelper.rb

Class Method Summary collapse

Class Method Details

.check_for_uniqueness(string_array) ⇒ Object 



90
91
92
 
# File 'lib/charshifthelper.rb', line 90

def self.check_for_uniqueness string_array
  return string_array.uniq.length == string_array.length
end

.check_for_valid_array_elements(string_array) ⇒ Object 



81
82
83
84
85
86
87
88
 
# File 'lib/charshifthelper.rb', line 81

def self.check_for_valid_array_elements string_array
  string_array.each do |chr|
    if !chr.is_a?(String) || chr.length != 1
      return false
    end
  end
  return true
end

.confirm_fixnum(input_val) ⇒ Object 



3
4
5
6
7
8
9
 
# File 'lib/charshifthelper.rb', line 3

def self.confirm_fixnum input_val
  if !input_val.instance_of? Fixnum
    raise TypeError, 'Input value must be of type fixnum'
  else
    return true
  end
end

.encoding_ind_split(input_string) ⇒ Object 



11
12
13
14
15
16
17
18
 
# File 'lib/charshifthelper.rb', line 11

def self.encoding_ind_split input_string
  split_string = []

  input_string.each_char do |chr|
    split_string << chr
  end
  return split_string
end

.get_char_by_ord(ordinal_value, char_encoding_type) ⇒ Object 



45
46
47
 
# File 'lib/charshifthelper.rb', line 45

def self.get_char_by_ord ordinal_value, char_encoding_type
  return ordinal_value.chr(char_encoding_type)
end

.get_encoding(string) ⇒ Object 



53
54
55
 
# File 'lib/charshifthelper.rb', line 53

def self.get_encoding string
  return string.encoding.to_s
end

.get_encoding_length(encoding) ⇒ Object 



57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
 
# File 'lib/charshifthelper.rb', line 57

def self.get_encoding_length encoding
  max = 100000000000
  min = 0
  guess = 50000000000

  while true
    begin guess.chr(encoding)
      if (min > max)
        return max + 1
      else
        min = guess + 1
        guess = (max + min) / 2
      end
    rescue
      if min > max
        return max + 1
      else
        max = guess - 1
        guess = (max + min) / 2
      end
    end
  end
end

.get_ord_by_char(character) ⇒ Object 



49
50
51
 
# File 'lib/charshifthelper.rb', line 49

def self.get_ord_by_char character
  return character.ord
end

.get_shift_distance_minus_loops(input_val, collection_length) ⇒ Object 



20
21
22
23
24
25
26
27
28
 
# File 'lib/charshifthelper.rb', line 20

def self.get_shift_distance_minus_loops input_val, collection_length
  absloute_input_val = input_val.abs
  remaining_difference = absloute_input_val % collection_length
  if absloute_input_val > collection_length
    return input_val > 0 ? remaining_difference : 0 - remaining_difference
  else
    return input_val
  end
end

.get_shift_position(starting_pos, shift_val, encoding_length) ⇒ Object 



30
31
32
33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/charshifthelper.rb', line 30

def self.get_shift_position starting_pos, shift_val, encoding_length
  collection_length = encoding_length
  shift_difference = self.get_shift_distance_minus_loops(shift_val, collection_length)
  start_plus_shift = starting_pos + shift_difference
  if shift_difference + starting_pos == encoding_length
    return 0
  elsif start_plus_shift > collection_length
    return 0 + start_plus_shift - collection_length
  elsif start_plus_shift < 0
    return collection_length + start_plus_shift
  else
    return start_plus_shift
  end
end