Module: Shorten::String

Included in:
String
Defined in:
lib/shorten.rb

Instance Method Summary collapse

Instance Method Details

#unshorten(chars = Shorten::BASE62) ⇒ Fixnum/Bignum

Returns Unshortened number.

Parameters:

  • chars (String) (defaults to: Shorten::BASE62) —

    Sequence of characters for unshortening

Returns:

Raises:

  • (ArgumentError) 


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# File 'lib/shorten.rb', line 29

def unshorten chars = Shorten::BASE62
	raise ArgumentError.new('String required') unless chars.is_a? String

	num = 0
	len = chars.length
	self.each_char do |c|
		num *= len
		char = chars.index(c)
		raise ArgumentError.new('Cannot unshorten: invalid characters') if char.nil?
		num += char
	end
	num
end