An optimization-based multi-sensor state estimator - HKUST-Aerial-Robotics/VINS-Fusion

I have heard a lot of people saying "Jupyter" with "py" as in Python, while others say "Jupyter", with "py" as in the name of the planet.
So, what is the most

Kenny Levinsen's website

I think it's related to the parent process creating new subprocess and does not have tty. Can anyone explain the detail under the hood? i.e. the related working model of bash, process creation, etc...

I am trying to run a little init script instead of sysvinit, which drops me in a shell. My code for the init script is:

#!/bin/sh

PATH=/sbin:/bin:/usr/sbin:/usr/sbin

mount -t proc proc /proc
mou...

In C++, when and how do you use a callback function?

EDIT:
I would like to see a simple example to write a callback function.

在上一篇《Linux fontconfig 的字体匹配机制》当中，
我们已经了解过了 fontconfig 的原理。没想到一晃过去了 4 个月之久，
别忘了还缺少实践部分呢！
现在就一起来实践一把 fontconfig 的配置吧。

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STM32 tutorial with STM32Cube and Keil MDK-ARM. Contribute to dekuNukem/STM32_tutorials development by creating an account on GitHub.

KDE products API documentation

C++ port of ZXing. Contribute to zxing-cpp/zxing-cpp development by creating an account on GitHub.

I am trying to add my own program to a small linux, created with Buildroot.
What I've done so far:

I've created a new directory inside my 'buildroot/package/' called 'HelloWorld'.
Inside 'buildroot/