Sigil | Sigil is a multi-platform EPUB ebook editor | Media library
kandi X-RAY | Sigil Summary
kandi X-RAY | Sigil Summary
Sigil is a free, open source, multi-platform ebook editor that uses Qt (and QtWebEngine). It is designed to edit books in ePub format (both ePub 2 and ePub 3).
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QUESTION
Should the MongoClient connection be closed every time the server shuts down?
I have seen the following code snippet and wanted to know if this is actually valid and should be done or if it's completely unnecessary to perform a closing on exit:
...ANSWER
Answered 2022-Apr-07 at 09:49Should the MongoClient connection be closed every time the server shuts down?
Yes, it is a good practice to close the connection. As for every connection, mongo DB does assign a thread for its execution. If you won't close it, it keeps using the resources on the DB server.
Node.js connections use the pool to connect to DB and it can be reused while it is not being used, but it is good practice to close the connection if you are exiting the script as it won't close the connection automatically.
QUESTION
I want to pass a procedure pointer between two classes in modern Fortran. this procedure pointer should
- be called from within the second object
- access the first ojects' components, without having it as dummy argument.
A clear example is here, imagine doing an object-oriented wrapper of an ODE solver:
...ANSWER
Answered 2022-Apr-01 at 18:05It is illegal to invoke a procedure pointer to an internal procedure, after the host procedure gets out of scope.
The draft of Fortran 2015 N2123 mentions this in NOTE 15.17
NOTE 15.17
An internal procedure cannot be invoked using a procedure pointer from either Fortran or C after the host instance completes execution, because the pointer is then undefined. While the host instance is active, however, if an internal procedure was passed as an actual argument or is the target of a procedure pointer, it could be invoked from outside of the host subprogram.... an example follows
Often, internal procedures are implemented using trampolines. That is, a piece of executable code placed on the stack, that enables accessing the local scope and calls the procedure itself. The pointer is then a pointer to the trampoline. Once the host function gets out of scope, the pointer to the stack is invalid.
QUESTION
I am learning SwiftUI on 100 Days of SwiftUI on Hacking with Swift. My Xcode SwiftUI Preview crashes and I don't know why. Running on Simulator works though. I tried to completely reinstall Xcode (deleting the app, preferences, libraries etc), but it still doesn't work. I am using Xcode 13.2.1 on iMac 2019 i9 9900K 64GB RAM.
Here is the problem details. (cannot contain full report because of 30000 word limit)
...ANSWER
Answered 2022-Mar-29 at 10:26Solved by adding ZStack in Preview struct solved it.. This is maybe a bug. Solution
QUESTION
#include
#include
size_t ft_strlcpy(char *dst, const char *src, size_t dstsize)
{
unsigned int i;
unsigned int dst_len;
i = 0;
dst_len = strlen(dst);
if (dstsize > 0)
{
while (src[i] != '\0' && i < dstsize - 1)
{
dst[i] = src[i];
i++;
}
dst[i] = '\0';
}
return (strlen(src));
}
int main(void)
{
char dst[100] = "HelloWorld!";
char dst2[100] = "HelloWorld!";
const char src[11] = "teststring";
int dstsize = -1;
printf("mine : %zu\n", ft_strlcpy(dst, src, dstsize));
printf("%s\n", dst);
printf("string.h : %zu\n", strlcpy(dst2, src, dstsize));
printf("%s\n", dst2);
return (0);
}
ANSWER
Answered 2022-Mar-21 at 07:50There is no reason to compute the length of the string in dst for strlcpy: dst_len = strlen(dst); is useless and counterproductive.
Here is a modified version:
QUESTION
[NOTE: I asked this question based on an older version of Rakudo. As explained in the accepted answer, the confusing output was the result of Rakudo bugs, which have now been resolved. I've left the original version of the Q below for historical reference.]
Raku sometimes prohibits re-binding; both of the following lines
...ANSWER
Answered 2021-Sep-22 at 00:26A decidedly non-authoritative answer. Curiously, like jnthn in your prior Q, it feels natural to answer your questions in reverse order:
Is there any way to tell Raku "don't rebind this name to a new value, no-really-I-mean-it"?
As far as I can tell so far -- purely by testing variations, not by checking roast or the compiler source -- you can and must declare a sigil free symbol, and it must not be one declared with my \symbol ...:
QUESTION
I'm having some trouble installing the python cryptography package on my raspberry pi, specifically with python version 3.9.8 (installed with pyenv). The cryptography package is installed on my system using pacman (python-cryptography package), and thus works using the main python interpreter (3.10.1). However, I need some version of python 3.9 specifically for another package I am using in this project. Any time I try to install cryptography through the python 3.9.8 environment, I get the following error:
ANSWER
Answered 2022-Jan-14 at 19:59@jakub's solution ended up solving the problem for me. I uninstalled the version of rust that was installed through pacman. To replace it, I installed rustup and then using rustup, installed the latest nightly version of rust (1.60). Once I did that, installing the cryptography package worked just fine.
If you are using rustup, just make sure that you add ~/.cargo/bin to your PATH before installation. Also, the command I used to install rust through rustup was rustup toolchain install nightly.
QUESTION
I have a small app using Elixir Desktop. This app works relatively well and launches without issues:
https://github.com/Fl4m3Ph03n1x/market_manager/tree/master/apps/web_interface
However, I have dialyzer complaining about types. I am not sure if this is a false positive, or if I am doing something wrong.
ProblemI have a MenuBar in my application with some basic functionality. This MenuBar is as far as I understand, a Phoenix LiveView component (because it has a mount and a render functions). So this code should look familiar for most users of Phoenix and LiveView:
ANSWER
Answered 2022-Jan-27 at 16:37Turns out this was a bug from the library.
The fix is already in master as my PR was accepted: https://github.com/elixir-desktop/desktop/issues/17
QUESTION
I have a Python package with a native extension compiled by Cython. Due to some performance needs, the compilation is done with -march=native, -mtune=native flags. This basically enables the compiler to use any of the available ISA extensions.
Additionally, we keep a non-cythonized, pure-python version of this package. It should be used in envirnments which are less performance sensitve.
Hence, in total we have two versions published:
- Cythonized wheel built for a very specific platform
- Pure-python wheel.
Some packages depend on this package, and some of the machines are a bit different than the one that the package was compiled on. Since we used -march=native, as a result we get SIGILL, since some ISA extension is missing on the server.
So, in essence, I'd like to somehow make pip disregard the native wheel if the host CPU is not compatible with the wheel.
Th native wheel does have the cp37 and platform name, but I don't see a way to define a more granular ISA requirements here. I can always use --implementation flags for pip, but I wonder if there's a better way for pip to differentiate among different ISAs.
Thanks,
...ANSWER
Answered 2022-Jan-19 at 09:11The pip infrastructure doesn't support such granularity.
I think a better approach would be to have two versions of the Cython-extension compiled: with -march=native and without, to install both and to decide at the run time which one should be loaded.
Here is a proof of concept.
The first hoop to jump: how to check at run time which instructions are supported by CPU/OS combination. For the simplicity we will check for AVX (this SO-post has more details) and I offer only a gcc-specific (see also this) solution - called impl_picker.pyx:
QUESTION
I want to get a video URL from HTML -:
...ANSWER
Answered 2022-Jan-11 at 12:20Try this code - :
QUESTION
So i have a Card class:
...ANSWER
Answered 2021-Dec-25 at 14:47Use Proxy with the construct trap.
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