# Base62 encoding in Ruby
# Useful for creating tiny url slugs from numeric ids
#
# Example:
#   Base62.encode 1_000_000   # => "4c92"
module Base62
  CHARS = ('0'..'9').to_a + ('a'..'z').to_a + ('A'..'Z').to_a

  # Adapted from http://refactormycode.com/codes/125-base-62-encoding
  def self.encode(i)
    return '0' if i == 0
    s = ''
    while i > 0
      s << CHARS[i.modulo(62)]
      i /= 62
    end
    s.reverse!
    s
  end
end