Returns the ordered digits for the given non-negative integer.

An optional base value may be provided representing the radix for the returned digits.

Examples

iex> Integer.digits(101)
[1, 0, 1]

iex> Integer.digits(58127, 2)
[1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1]

Converts a binary from a text representation of an integer in an optional base base to the corresponding integer.

If the base base is not given, base 10 will be used.

If successful, returns a tuple of the form {integer, remainder_of_binary}. Otherwise :error.

Raises an error if base is less than 2 or more than 36.

Examples

iex> Integer.parse("34")
{34, ""}

iex> Integer.parse("34.5")
{34, ".5"}

iex> Integer.parse("three")
:error

iex> Integer.parse("34", 10)
{34, ""}

iex> Integer.parse("f4", 16)
{244, ""}

iex> Integer.parse("Awww++", 36)
{509216, "++"}

iex> Integer.parse("fab", 10)
:error

iex> Integer.parse("a2", 38)
** (ArgumentError) invalid base 38

Returns the integer represented by the ordered digits.

An optional base value may be provided representing the radix for the digits.

Examples

iex> Integer.undigits([1, 0, 1])
101

iex> Integer.undigits([1, 4], 16)
20