What is Docker or containerization?
The Beginning Imagine you are an average guy who is interested in coding and building something great that solves someone’s problems. Imagine you are not really writing an interactive desktop program, but...
The actual RO connection help you won’t find anywhere else
Multiple companies are selling RO (Reverse Osmosis) based water purifiers these days, and all of them will have some confusing diagram to accompany their product so that you are forced to call...
Setting SSH and LEMP on a bare-bones Debian server
So you got yourself access to a Debian server (or virtual private server) and have logged into it by one way or the other. In this tutorial, we will learn how to...
Generic Factory in C++
A generic factory is a factory that can register any class type. It is very easy to write because we are allowed to use void pointers.
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 |
#include <functional> class Factory { public: Factory() {} ~Factory() {} void Register(const std::string _key, const std::function<void *()> _creator) { m_creators[_key] = _creator; } template<typename ClassType> ClassType* Get(const std::string _key) const { return static_cast<ClassType *>(m_creators.at(_key)()); } private: std::map<std::string, std::function<void *()> > m_creators; }; |
Usage:
|
1 2 3 4 5 6 7 8 9 |
int main() { Factory f; f.Register("Derived1", &BaseClass<Derived1>::CreateInterface); f.Register("Derived2", &BaseClass<Derived2>::CreateInterface); Derived1 *d1 = f.Get<Derived1>("Derived1"); Derived2 *d2 = f.Get<Derived2>("Derived2"); Derived1 *d2 = f.Get<Derived1>("Derived2"); // This also compiles!!! } |
As we are...
Maximum Subarray
Problem statement: Find the largest sum that is possible in an array. I.e., find the maximum sub-array. Solution: From the very first this problem looks complicated because of how it is framed....
Limit of time
Ticking away the moments that make up a dull day Fritter and waste the hours in an offhand way. Kicking around on a piece of ground in your home town Waiting for...
Memento Pattern
This PDF was submitted to BITS PILANI Work Integrated Learning Program 2019 Object Oriented Analysis and Design (S2_18_SSZG514) for the final assignment.
Money and power
I have not seen this discussed, yet. I had this idea that has given me a lot of perspective in life and has helped to understand why and how our system. Our system...
Dark theme for QtCreator theme/Visual Studio
This is based on this Visual Studio 2013 for QtCreator along with my own changes. On Windows: Put the XML file in %APPDATA%/QtProject/qtcreator/styles On Linux/Unix: Put the XML file in $HOME/.config/QtProject/qtcreator/styles You...
Installing Node.js and NPM on Manjaro Linux
Since Manjaro is based on Arch, we can surely use pacman to install node.js and npm. But true freedom of npm can be easily enjoyed without needing root access all the time.