av | HTML5 audio/video clipper | Video Utils library

You can use a virtual function to downcast like this:

This is a problem I once had when attempting to send numpy images (converted to bytes) through sockets. The problem was that the bytes string was too long.

So instead of sending the entire image at once, I sliced the image so that I had to send, say, 10 slices of the image. Once the other end receives the 10 slices, simply stack them together.

Keep in mind that depending on the size of your images, you may need to slice them more or less to achieve the optimal results (efficiency, no errors).

You should like with the {fmt} library as documented in https://fmt.dev/latest/usage.html. For example, if you are using CMake it can be done as follows:

On program exit I get a core dump with messages about memory corruption, double free etc. (e.g. double free or corruption (fasttop)).

This was probably because you overwrote the loop variable results_sz inside the for causing undefined behavior.

How to return an undef value from XS sub denoting that something went wrong (not an empty array)?

You can return &PL_sv_undef to signal an undefined value, see perlxs for more information. For example like this:

A standard integer is 4 bytes in width, meaning that, in memory, your 500 will look like this (assuming Big endian): 0x00 0x00 0x01 0xF4.

If you do c + 1, with c being an int * you are actually moving the pointer by these four bytes.

By casting c to a char *, you change the step width of the pointer to 1, meaning that it will now point to this location: 0x00 0x00 0x01 0xF4

By writing your 500 to that value, the same four bytes will now look like this: 0x00 0x00 0x00 0x01 (the remaining 0xF4 will be written to the next integer).

I am now assuming that your machine is little endian, meaning the bytes are 'reversed'.

0x90 0xF4 0x01 0x00 The 0x90 is leftover from the assignment of 400 in the previous iteration and by putting them all together, you get 0x01f490 or 128144.

The easiest way to do this at present might be with Makie.jl, which gives you very granular control over the plotting process. For example:

There are two different methods for obtained the value of zv.

Option 1: Initialization Calculation

The first method is to use floating point numbers to obtain a single calculation that can be used for initialization of a parameter. This first method allows any type of functions such as np.roots() or np.sqrt(). The function ZCALC() returns a floating point number. Even though Gekko variables are used as an input, the floating point number is accessed from a scalar variable with T1.value or from an array variable with x[i].value.

The replacement doesn't occur for the column City because you're trying to do some partial replacement in the column values. Whereas function DataFrame.replace uses the entire value as a mapping.

To achieve what you want for column City, you can use multiple nested regexp_replace expressions that you can dynamically generate using Python functools.reduce for example:

Welcome @Backup Gov18,

This is a documented issue.

Note: Only one active BarCodeScanner preview is supported currently. When using navigation, the best practice is to unmount any previously rendered BarCodeScanner component so the following screens can use without issues.

There is a workaround.

Instead of conditionally rendering the component, you could render it inside another dedicated screen component.

This way, after this new screen reads the barcode, you could navigate back to your first screen. Navigating back may unmount this new screen. You can force unmount if you need to.

As you are using react-navigation, you had better use .pop() instead of goBack().

You can also use expo-camera instead of expo-barcode-scanner. expo-camera does not have this issue. It also offers more options like flashlight/torch and switching cameras.