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# 谈 C++17 里的 Observer 模式 - 补 - hzSomthing
关于观察者模式上一 POST 的补充与改进，…
[https://hedzr.com/c++/algorithm/cxx17-observer-pattern-2/](https://hedzr.com/c++/algorithm/cxx17-observer-pattern-2/)
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```bash
pip install openai-whisper
```
Output:
```
Collecting openai-whisper
Using cached openai-whisper-20240930.tar.gz (800 kB)
Installing build dependencies ... done
Getting requi…
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# 实现一个定时任务库：ticker-cxx | hzSomthing
介绍一个 Scheduler 类库的实现，不但支持 Timer/Ticker，也能提供行事历周期任务的支持…
[https://hedzr.com/c++/algorithm/ticker-timer-within-cxx17/](https://hedzr.com/c++/algorithm/ticker-timer-w…
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While this is not a bug in deal.II per se, it shows up for us when you use clang>15 (at least on my mac).
This is also related to the following issue:
https://github.com/PixarAnimationStudios/Op…
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## Bug Report
If you configure Tacho with tests ON, tacho builds it's own Gtest (libtacho-gtest.so), but that lib needs to depend on `-lpthread`
The key part of this error is:
```
ld.lld: err…
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Hi bnprks,
I'm trying to install BPCells on a linux server, but I got the following error:
* installing *source* package ‘BPCells’ ...
** using staged installation
Testing hdf5 by compiling ex…
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I have the file: example/html/test.html
I use nxxm . -t clang-cxx17
then nxxm try to compile this file and I get:
~~~
[ 99%] Linking CXX shared library libtest_impl.js
examples/html/CMakeFiles/…
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[ 67%] Performing build step for 'arrow_cpp'
-- arrow_cpp build command succeeded. See also /home/st/yyp/openMVG/openMVG_Build/arrow/src/arrow_cpp-stamp/arrow_cpp-build-*.log
[ 67%] Performing in…
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**Describe the bug**
cmake recognises that the definition name cxx standard is incorrect.
```cmake
# file kokkos_test_cxx_std.cmake From 4~6 lines
set(EXTENSION_NAME CMAKE_CXX${standard}_EX…
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See https://github.com/nlmixr2/nlmixr2/issues/253.
Rstan sets some environement variables: `PKG_CPPFLAGS`, `PKG_LIBS` and `USE_CXX17`. These variables interfere with other R packages using `R CMD S…