Published in Level Up Coding·PinnedMember-onlyROS Spinning, Threading, QueuingEffective use of multi spinner threads, different queues in ROS — Robot Operating System (ROS)¹ is a popular framework for developing robotics application. One of the main facilities that ROS provides is the publisher-subscriber communication² that is used for message-passing between components. While it is easy to implement the publisher-subscriber, it is not obvious what is going on underneath it and…Programming8 min readProgramming8 min read
Published in Level Up Coding·PinnedMember-onlyMemory Model BasicMemory orderings for multi thread programming in C++ — Introduction As many know, since C++11, std::atomic<T> was introduced as a part of the standard library. Probably the most obvious part of the functionality is that each instantiated type of std::atomic<T> can be atomically operated on from different threads without causing any data race. But also, there is another aspect of…Programming10 min readProgramming10 min read
Mar 1Understanding std::visit in C++: A Type-Safe Way to Traverse Variant ObjectsIn this post, we explored the use of std::visit in C++, which is a powerful utility that enables us to apply different functions to a variant object based on its current type. std::visit can be useful in scenarios where we need to handle variant objects with multiple possible types, such…Programming4 min readProgramming4 min read
Dec 8, 2022Launching CppExpertFree website to learn C++ interactive way. If you’re looking to learn C++ in a free and enjoyable way, then you’re in luck! There’s a new website that offers just that. …Cpp2 min readCpp2 min read
Published in Level Up Coding·Dec 27, 2020Member-onlyCMake Variable Scopeadd_subdirectory vs include, function vs macro in CMake — Introduction As you may already know, CMake is a popular open source tool that manages the build process of software. With CMake, you can define variables along with a set of directives and instructions to describe your project processes (building, testing, packaging etc). You can consider the variables in CMake like…Programming6 min readProgramming6 min read
Published in Level Up Coding·Jul 24, 2020Member-onlyC++ Detection Idiom explainedIntroduction of the popular meta-programming pattern — Introduction Templates are a useful feature with which we can define a generic function or a generic class that can be used with different types. Among all other cool things you can do with Templates, there is a popular templates technique called “detection idiom”. Detection idiom is a kind of pattern…Programming7 min readProgramming7 min read
Published in Level Up Coding·Jul 14, 2020Member-onlyUseful Preprocessor Macro TricksEffective preprocessor meta programming tips C/C++ preprocessor¹ is a tool that is used to process source codes before the compilation process. The preprocessors process certain directives that begin with hash(#) symbol in source codes. There are several preprocessor directives. …Software Development6 min readSoftware Development6 min read
Published in Level Up Coding·Jul 6, 2020Member-onlyC++ Templates type identity techniqueIntroduction of “type identity” trick and introduction of std::common_type — Templates are a useful feature with which we can define a generic function or a generic class that can be used with different types. To use the templates function, we need to specify the concrete types as the templates arguments on each call to the function. In practice, explicitly specifying…Programming5 min readProgramming5 min read
Published in Level Up Coding·Jun 23, 2020Member-onlyLittle endian vs Big endianThings to know about endianness in programming Endianness The terms endian and endianness refer to the convention that decides the ordering of bytes when processor stores a word data from its register to memory or the other way around, loads a word data from memory to its register. Word data is…Programming5 min readProgramming5 min read
Jun 19, 2020Member-onlyHow to test a self-driving carIntroduction of X-in-the-loop test method Even though the topic “self-driving car” has become trendy recently, the technology itself had been known for a long time already, more than decades. In fact, there are many companies and academic institutions that successfully demonstrated running self-driving car. However, as of today, we don’t…Technology5 min readTechnology5 min read
