Background I want to convert a String to an integer. To this extent I know I can use one of the two following functions: String.to_integer Integer.parse My concern My concern here is the API. With option 1 if the string is invalid, it will just raise an exception and explode. This is not very eli…

For 1. I disagree with you, I consider it perfectly elixiry. The function is for data that you know can be parsed as an integer. You should not use it for unknown inputs. The documentation is pretty clear string must be the string representation of an integer. Otherwise, an ArgumentError will be…

If there can be at least one digit be parsed to the given base, you’ll get {integer, rest}, :error otherwise, rasie should only happen if the base is invalid. case Integer.parse(str) do {num, ""} -> {:ok, num} {_, rest} -> {:error, :unparsable} :error -> {:error, :unparsable} end

[image] jola: For 1. I disagree with you, I consider it perfectly elixiry. I respect your opinion, but I would like to direct you to the official Elixir documentation, in specific to this part: In Elixir, we avoid using try/rescue because we don’t use errors for control flow . We take error…

I believe you’re misunderstanding the intent of that paragraph. It is correct that errors are not used as control flow, and that’s why the function explicitly says “must be the string representation of an integer”. The paragraph supports this, you shouldn’t wrap String.to_integer in a try. That’s th…

Will you really allow user to specify base? Or you will really use base over 36? In general almost all Elixir functions can throw when passed incorrect arguments. Do you also want to prevent situation when someone passes atom to Enum.reverse/1?

I have a related question. (Well, I think it might be related; I’m a novice and everything’s possible. :smile: ) I see that Elixir’s naming conventions discuss the trailing-bang : A trailing bang (exclamation mark) signifies a function or macro where failure cases raise an exception. Many funct…

Elixir Programming Language Forum

String to integer tuple API

Questions & Help Questions

NobbZ July 26, 2019, 11:03am 5

There is none, but you can easily wrap yourself, as I have shown in my code example.