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.

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