[float('inf')]

approved

ok, I'll do it

since the output string is always shorter than the input, i think it would be better to make the user function mutate a single input/output argument rather than having 2 arguments for input and output. this would avoid the usual difficulty when passing an output buffer: you have to tell users how large exactly the buffer is going to be, as this can restrict some ways of writing the function.

approved

Approved.

Makes sense. Thanks for the provided translation.

Dumb mistake by me. Fixed.

It should generally be understood by site practitioners that the description should be universal (language agnostic) and as such when looking at data the type used is not critical, so long as the specs are clear for the user to comprehend and procede coding in the language of their choice.

Otherwise it becomes very messy in terms of maintaining the description as new languages are added.

[[]] is a 1x0 matrix, not an NxN matrix.

C Translation

You probably should have changed the square braces [] to the curly braces {} in the description. Aside from that, everything seems fine.

you shouldn't post code like that; anyone can see it.

I added the spoiler flag to your comment

What would the expected return value be if the input was null?

approved