I think for integer division, it has to return 0 because infinity is
expressed as a float. I'm going to agree with Erkal, though, you definitely
don't want to wrap all your math statements in a maybe or result type, that
would make most code considerably more verbose.
On Sat, Feb 18, 2017 at 5:38 PM, 'Rupert Smith' via Elm Discuss <
elm-discuss@googlegroups.com> wrote:
> On Saturday, February 18, 2017 at 9:53:49 PM UTC, Erkal Selman wrote:
>>
>> Why didn't you try it?
>> Try it!
>> Yes, it returns Infinity.
>> Would you that error handling for every other operation, like for example
>> the squareroot of negative numbers, or the logarithm of zero? I don't think
>> that this is a good idea for a language like elm.
>>
>
> With elm-repl:
>
> > type alias T = { val : Int }
> > t = T 4
> { val = 4 } : Repl.T
> > x = t.val / 0
> -- TYPE MISMATCH ---------------------------------------------
> repl-temp-000.elm
>
> The left argument of (/) is causing a type mismatch.
>
> 8| t.val / 0
> ^^^^^
> (/) is expecting the left argument to be a:
>
> Float
>
> But the left argument is:
>
> Int
>
> Hint: Elm does not automatically convert between Ints and Floats. Use
> `toFloat`
> and `round` to do specific conversions.
> <http://package.elm-lang.org/packages/elm-lang/core/latest/Basics#toFloat>
>
> Hint: The (/) operator is specifically for floating point division, and
> (//) is
> for integer division. You may need to do some conversions between ints and
> floats to get both arguments matching the division operator you want.
>
>
> > x = t.val // 0
> 0 : Int
> >
>
> So for integer division by zero, it simply returns zero!
>
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