#public #programming
Created: 2025-03-12 08:19
CMake is a build tool. It is not a build-system itself, rather it generates configuration for other build systems, like Ninja.
For a large scale CPP programming project such a tool is valuable. In CMakeLists.txt is described how and what actions CMake should perform. Since a lot is based on automatic detection it makes building a project much easier.
table
from #cmake
#computers #linux
Created: 2023-12-08 13:30
The Linux dm-flakey target is the same as the linear target except that it exhibits unreliable behaviour periodically. It’s been found useful in simulating failing devices for testing purposes.
To use it do the following:
sudo dmsetup create <name> --table "<begin-sector> <size> flakey <source-device> <offset> <period-normal> <period-faulty>"
This would create a block device under /dev/mapper/<name> which forwards IO to <source-device> for <period-normal> after which it returns IO errors for <period-fault>.
Created: 2023-11-14 13:10 #git
git log --oneline --graph $(git merge-base master HEAD)^..HEAD master
This command shows the relation between the current head (HEAD), master and their common ancestor. It does the following:
git merge-base master HEAD retrieves the common ancestor between master and HEAD.git log <options> <common ancestor>^..HEAD logs the commits between the parent of the common ancestor and the HEAD.Created: 2023-06-22 12:44
#mind
Our minds love to express self-pity. An ever growing TODO list, while you already have so much backlog on there… “Poor me, I’m never getting all this done.”
Recently I realized I get this strongly when I have much to do and I get interrupted with yet more things to do. This drains my energy to go against the thoughts of “I have to do everything here, can never get some time to myself”. Of course, this is my mind expressing self pity. Things are really not as bad as I make them out to be. Rather the low energy grumpy glasses I’ve got on at those times cloud how things really are.
Created: 2023-06-22 11:50 #cpp #qt #json
With the following snippets you can convert a QJsonObject into a QString.
First convert the QJsonObject to a QJsonDocument. Then output the document as a QByteArray (the toJson method) and feed that to the QString init.
QJsonDocument doc(QJsonObject json);
QString jsonString(doc.toJson());