Convertat
Provides functions for converting from and to arbitrary bases.
Summary
| from_base(digits, base) | Converts any string of digits or list of digits (where each digit is a string) to a value in decimal base (base 10), given a starting base |
| to_base(val, base, opts \\ [as_list: false]) | Converts a value in decimal base ( |
Functions
Specs:
- from_base([] | String.t, list_base) :: integer
- from_base(String.t, integer_base) :: integer
Converts any string of digits or list of digits (where each digit is a string) to a value in decimal base (base 10), given a starting base.
The starting base can be an integer in the 2..36 range (in which case the native String.to_integer/2 function is used) or a list with at least two elements (digits).
Examples
iex> "101" |> Convertat.from_base(2)
5
iex> "fe" |> Convertat.from_base(16)
254
iex> "foo" |> Convertat.from_base(["f", "o"])
3
iex> "↑" |> Convertat.from_base(["↓", "↑"])
1
iex> ["foo", "bar"] |> Convertat.from_base(["bar", "foo"])
2
iex> "test" |> Convertat.from_base(["onedigit"])
** (ArgumentError) list bases must have at least two digitsSpecs:
- to_base(integer, integer_base | list_base, [{:as_list, false}]) :: [String.t]
- to_base(integer, integer_base | list_base, [{:as_list, true}]) :: [String.t]
Converts a value in decimal base (val, which has to be an integer) to an arbitrary base. If the :as_list option is true, the resulting value in base base will be returned as a list of digits instead of a string of digits.
Examples
iex> 35 |> Convertat.to_base(36)
"z"
iex> 11 |> Convertat.to_base(["a", "b"])
"babb"
iex> 6 |> Convertat.to_base(["foo", "bar"], as_list: true)
["bar", "bar", "foo"]
iex> 10 |> Convertat.to_base(["↓", "↑"])
"↑↓↑↓"
iex> 42 |> Convertat.to_base(["onedigitbase"])
** (ArgumentError) list bases must have at least two digits