[FS] JSON Writer

George_Anderson

Has anyone written a function to convert a map to a JSON string? (Basically the inverse of parseJsonWithUnits).

Just looking for something rudimentary. It may be hard to do this if the map contains non-basic types. (e.g. after serializing a "plane", it wouldn't be straightforward to know that you needed to interpret the map as a plane when deserializing).

ilya_baran

See the toString function implementations in string.fs -- that doesn't exactly produce JSON, but it's close in a number of cases.

Ethan_K

I made this. It isn't a complete implementation (funkiness with arrays) but it does quite well. Hope that helps! Also, if you come up with improvements, I would happily integrate them. The feature is just so I can easily test it - to use in FS, you should just use `mapToJSON` feature.

George_Anderson

@ilya_baran Excellent, this is generally working nicely.

I have what appears to be a bug with the JSON unit parser, but I may be mis-using something:

println(parseJsonWithUnits("[\"-1.0 meter\"]"));

Prints "[1.0 meter]"

(It makes negative values with units positive). It doesn't happen with unitless negative values.

ilya_baran

Good catch -- thanks.  I can see where it is -- logging it.

George_Anderson

For any future reader here, the bug has been fixed.

George_Anderson

I eventually made this mini-library:

https://cad.onshape.com/documents/5cefacdb938ff43bebf6221b/w/ea9835015b262ecbfd6ae48d/e/0f8597197e5e1fc0c96ca73d

It's very much inspired by the OnShape stdlib string functions, and it also includes a template for how you can restore types after deserializing.