Class: String

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

Instance Method Summary collapse

Instance Method Details

#from_base34 ⇒ Object

Turn a base34 string representation into a base10 integer.

Raises:

  • (ArgumentError) 


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# File 'lib/user_friendly_id/string.rb', line 6

def from_base34
  raise ArgumentError.new("Invalid characters for a base34 number found") unless self.valid_base34?
  # strip whitespace, negative sign, and upcase
  kleen = self.kleened.upcase
  total = 0
  size = kleen.length
  for i in 0..size-1
    total += UserFriendlyId::BASE34_DIGITS.index(kleen[i,1]) * 34**(size-(i+1))
  end
  total *= -1 if is_negative?
  return total
end

#is_negative? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/user_friendly_id/string.rb', line 24

def is_negative?
  self.chr == '-'
end

#valid_base34? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/user_friendly_id/string.rb', line 19

def valid_base34?
  # only the alpha minus I & O is what we want...
  not /[^0-9a-zA-Z&&[^ioIO]]/.match(self.kleened)
end