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Templates Function Templates Function templates enable generic programming by allowing functions to operate with different data types. #include <iostream> using namespace std; template<typename T> void swapValues(T& a, T& b) { T temp = a; a = b; b = temp; } void testFunctionTemplate() { int x = 10, y = 20; ...

Vector A vector is a dynamic array that automatically resizes itself. It supports random access via the [] operator, allowing O(1) time access to any element by index. However, inserting elements at arbitrary positions is not an O(1) operation. Declaration #include <vector> using namespace std; vector<double> data; // A dynamic arr ...

Docker Image Operations Listing all available images on the local system: docker image list Pulling an image from the registry without specifying a tag defaults to the 'latest' tag: docker pull mysql Searching for available images in the registry: docker search mysql Official images are verified and maintained by Docker's team, ensuring ...

A running Linux container is fundamentally an isolated process environment built using three key technologies: Linux Namespaces for isolation, Cgroups for resource limits, and a root filesystem (rootfs) for the application’s view of the file system. This setup naturally divides a container into two conceptual parts: The container image, which ...

Launching and Managing Containers # Spin up an interactive Ubuntu shell docker run -it --rm ubuntu:22.04 bash # Run a detached Nginx container, map host port 8080 docker run -d -p 8080:80 --name web nginx Listing Rseources # Show only active containers docker ps # Show every container, running or stopped docker ps -a # Display locally cache ...

Resuming Existing Containers The docker start command is specifically designed to reactivate containers that have been previously created but are currently in a stopped state. When this command is executed, it locates the referenced container by its ID or name and initializes the main process without reconstructing the container's filesystem or ...

Image Definition An image is a collection of read-only layers stacked vertically, offering users a unified view of the filesystem. The following diagram illustrates this concept. From the left side, you can observe multiple read-only layers stacked on top of each other. Each layer (except the bottom one) contains a pointer to the layer beneath ...