Fixed encoding of NaN to json

[SimonSchneider]

fixes: #988

[ritchie46]

We can use generics to have a single implementation;

fn float_serializer<'a, T>(
    array: &'a PrimitiveArray<T>,
) -> Box<dyn StreamingIterator<Item = [u8]> + 'a + Send + Sync>
where T: num_traits::Float + NativeType + lexical_core::ToLexical
{
    Box::new(BufStreamingIterator::new(
        array.iter(),
        |x, buf| {
            if let Some(x) = x {
                if T::is_nan(*x) {
                    buf.extend(b"null")
                } else {
                    lexical_to_bytes_mut(*x, buf)
                }
            } else {
                buf.extend(b"null")
            }
        },
        vec![],
    ))
}

[SimonSchneider]

nice, didn't know that was possible 🎉

[codecov]

Codecov Report

Merging #990 (19968a3) into main (b9aa8e8) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #990      +/-   ##
==========================================
+ Coverage   71.37%   71.39%   +0.02%     
==========================================
  Files         357      357              
  Lines       19781    19791      +10     
==========================================
+ Hits        14118    14130      +12     
+ Misses       5663     5661       -2     

Impacted Files	Coverage Δ
src/io/json/write/serialize.rs	87.14% <100.00%> (+1.75%)	⬆️
src/bitmap/utils/slice_iterator.rs	87.93% <0.00%> (+1.72%)	⬆️

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[jorgecarleitao]

Thanks a lot for the PR. It looks great 💯

Thanks a lot @ritchie46 for the review 🙇