JSON reviver doesn't deserialize nodes correctly

[dqnykamp]

The JSON reviver math.json.reviver is not deserializing nodes correctly.
Example:

var x = math.parse("x/2");
var x2 = JSON.parse(JSON.stringify(x), math.json.reviver);
console.log(x.toString());  // outputs 'x / 2'
console.log(x2.toString());  // outputs [object Object]

It seems like x2 is composed of vanilla Javascript objects rather than nodes. Omitting the reviver completely achieves the same result, as demonstrated with underscore.

var x3 = JSON.parse(JSON.stringify(x));
console.log(_.isEqual(x2,x3));  // outputs true
console.log(_.isEqual(x,x2));  // outputs false

[josdejong]

Thanks for reporting, nodes are indeed not supported in serialization/deserialization. We should definitely add this. Same holds for the ResultSet class I think (result of multi line expressions like math.eval("a=1\nb=2").

EDIT: I see ResultSet already supports serialization, so it's just the nodes that we need to extend (I'm working on it).

[josdejong]

Should be fixed now in v4.1.0