1.7 KiB
All Your Base
Convert a number, represented as a sequence of digits in one base, to any other base.
Implement general base conversion. Given a number in base a, represented as a sequence of digits, convert it to base b.
Note
- Try to implement the conversion yourself. Do not use something else to perform the conversion for you.
About Positional Notation
In positional notation, a number in base b can be understood as a linear combination of powers of b.
The number 42, in base 10, means:
(4 * 10^1) + (2 * 10^0)
The number 101010, in base 2, means:
(1 * 2^5) + (0 * 2^4) + (1 * 2^3) + (0 * 2^2) + (1 * 2^1) + (0 * 2^0)
The number 1120, in base 3, means:
(1 * 3^3) + (1 * 3^2) + (2 * 3^1) + (0 * 3^0)
I think you got the idea!
Yes. Those three numbers above are exactly the same. Congratulations!
Running tests
Execute the tests with:
$ elixir all_your_base_test.exs
Pending tests
In the test suites, all but the first test have been skipped.
Once you get a test passing, you can unskip the next one by
commenting out the relevant @tag :pending
with a #
symbol.
For example:
# @tag :pending
test "shouting" do
assert Bob.hey("WATCH OUT!") == "Whoa, chill out!"
end
Or, you can enable all the tests by commenting out the
ExUnit.configure
line in the test suite.
# ExUnit.configure exclude: :pending, trace: true
For more detailed information about the Elixir track, please see the help page.
Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.