Sorting bug when NaN values exist

[GauravBhagchandani]

Describe the bug
Sorting seems to break when there's a NaN value in the series

Expected behavior
Values should be sorted in ascending order

Screenshots

[Harmedino]

what part of the code needs to be fixed a clue please

[steveoni]

You can check here

danfojs/src/danfojs-base/core/series.ts

Line 834 in 7638681

let sortedIdx = utils.sortArrayByIndex(rangeIdx, this.values, this.dtypes[0]);

And you can dropna and then sort

[GauravB159]

I need the rows with NaN though, because the other columns have usable values. It would make sense if the NaN values were all together somehow, at the start or the end.