castable | Castable library sanitizes dirty external data | Functional Programming library

The two most commonly used functions for rolling functions (that I'm aware of) are zoo::rollapply and data.table::frollapply().

However, neither seems capable of running a function which generates a data.frame for each step and then returning them either in a list or as a single rbind-ed data.frame.

As a trivial example, if I have a function which simply returns a trivial data.frame and I call it with a rolling function, I'd expect to get:

How to get square bracket or Array for single or multiple 'Details' lineitems. Need to get the square bracket or Array [ even for single line 'Details' too. we have more than 1 line 'Details'. The requirement is to populate the [ even from single line 'Details'.

xmlFile for single Line 'Details':

I've got a following class:

In Python code, would like to check the type of a variable against a provided type that I receive as a string (e.g., 'int', 'str', 'list'). I would like to check if my current object is castable to or is an instance of the provided string argument, including handling for inheritance (so basically, I would like to use isinstance). I know you can get the string representation of a built-in type, but is there a way to go the other way around and build a type object from its name?

I'm implementing a feature to get coordinate of an a-sky while moving the VR controller.

I have configuration files which can be populated with enums and their respective values and will then be read by my program.

For example, a configuration file (yaml format) may look like this:

How using a var local variable in a closure prevents the compiler from doing smart-cast?

I read that If we use the local (var) variable in a closure, then it is no longer smart-castable, because now it's kind of like a property: it can be modified from somewhere else, so the compiler can no longer make guarantees about its type.

Can someone make an example of this situation?

The C++ standard library in many places offers a kind of "awaitable" API: e.g. std::future and std::condition_variable can instantly "try" to get their value, "wait" undefinitely for their value, "wait_for" a certain std::chrono::duration, or "wait_until" a certain std::chrono::time_point is reached. I am struggling to create an abstract base class that captures these same operations.

I have a class that takes a 2-dimensional array as a parameter.