larryfox / rebase-ruby

Convert integers to a given base (2—62) and back again

Rebase

Convert integers to a given base and back again. Accepts bases 2—62, or an array of an arbitrary alphabet.

require 'rebase'

Base62 = Rebase(62)
Base62.encode(10622433094) # => "Base62"
Base62.decode('Base62') # => 10622433094

# Extensions to String and Integer
require 'rebase/ext'

'Base62'.decode_base(62) # => 10622433094
10622433094.encode_base(62) # => "Base62"

Rebase(base[, int])

Base can be an integer between 2 and 62, an array forming a custom alphabet (items are expected to respond to #to_s), or the symbol :hex or :binary for base 16 and base 2 respectively. Passing the optional int is the equivalent of calling Rebase(base).encode(int).

encode(int)

Returns string representation of int in a given base. int must be non negative, otherwise it raises an ArgumentError.

decode(str)

Returns integer representation of str in base 10. str must not be blank or contain invalid characters, otherwise it raises an ArgumentError.

License

The MIT License. Copyright © 2014 Larry Fox