carpentry | Handcrafted prototypes for Rails | Application Framework library

It may be because of the setState() which is called at every character inserted.

The best way to handle a search like this is to use a debouncer to give the query a delay, like this:

This might work.

We may get those objects from the global env with mget, stack it to a two column data.frame

In c (prior to c11), a given "function call" cannot be overloaded. If you want a function that operates on a vector or a function that operates on an element, those functions should have different names.

With c11, _Generic and macros let you dispatch based on argument type. See this SO answer. That would permit sin(x) to do a scalar operation if x was a double, or a vector operation if x was not.

In c++ functions can be overloaded. The same function (or operation) can do scalar operations on single elements and vector operations on multiple elements. You can also store results in auto type variables, so you can be agnostic to the return type.

Writing the glue code to convert a scalar operation into a vector one still has to be done somewhere, and C++ has only limited ability to automate writing that glue code.

Now, you could write c style tagged unions that could contain either vectors or scalars and have the code that operates on them dynamically switch between the two modes.

In c++ you could write template code that statically switches between vector and scalar implementations.

Both solutions are not something a beginner in either language would be able to successfully do.

c++ has valarray, which does limited vectorization for you, but it isn't well supported by compilers, nor does it extend well.

Various libraries support efficient vectorization of a limited set of operations; any good matrix library, for example.

Most higher level (than C/C++) languages end up implementing their lower level high speed code in C or C++ or (in some cases) more directly in assembly. Usually C/C++ with assembly or "intrinsics" augmentation is enough to get the most of the performance speedup they want.

To return eg the StepCount for all Job whose LevelNumber is 1 and JobNumberOnLevel is 2:

Presumably you're talking about the Microchip MCP4728. This is an I2C attached device, and so it has an address on the I2C bus. If you're using it in its default factory condition, address 0b1100000. So, to have "two different chips", you'd need either 2 separate I2C buses, or take advantage of the reprogrammable addressing on the MCP4728 and set one of them to 0b1100001 (for which you'll need control of the /LDAC pin on the devices) so that 2 can exist on one I2C bus.

Either way, you'll need some sort of "context" for the device that you can pass to your C functions. That might simply be the bus number or the device address.

Or you could get creative and (as hinted at in the comments) have some sort of struct that, amongst other things, contains the device address or bus number. For that you'd need an initialiser, a function that'll act in an equivalent manner to a constructor. You'd pass this struct into each of the C functions, much as described by OI Sen. There's various settings available on the MCP4728 (like VRef selection, gain, and power state), so storing the current values of those in the struct would also be a good idea.

==EDIT==

Pygmalion (OP) has found a link to a useful answer, here Python ctypes pointer to struct as identifier without member access.

Also, it might be convenient to wrap the whole thing up in a python class, whereupon you could have a __del__ destructor to ensure that the cleanup happens automatically.

Try this-

You need to json_encode() it in php first so it gets sent as as [{"trade_type":"Carpentry"...}]