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When writing code, you might want to verify what type the compiler deduced for a variable. Modern IDEs like Visual Studio and VS Code provide this capability directly. Simply hover your mouse over the variable in question, and a tooltip will display its type. For this to work, your code should be syntactcially correct since the IDE performs sta ...

Recently, the project required implementing a rubber band affect on Windows, so I did some research and want to share it. Windows system supports the rubber band effect, which can be achieved using Win32 methods: SystemParametersInfo(SPI_SETDRAGFULLWINDOWS, showFullWindow, NULL, 0); showFullWindow is a variable. If you need the default Windows ...

Sorting Techniques Bubble Sort Implementation class Solution { public: void sortColors(vector<int>& arr) { performBubbleSort(arr); } private: void performBubbleSort(vector<int>& data) { int length = data.size(); for(int i = 0; i < length - 1; i++) { for(int j = 0; j &lt ...

Tmeplate parameters in C++ are not limited to types—they can also be compile-time constants, known as non-type (or numeric) template parameters. These enable powerful compile-time computations and fixed-size data structures. Constraints on Non-Type Template Parameters Must be compile-time constants—variables are not allowed. Floaitng-point val ...

A - First ABC The problem requires identifying the minimum 1-indexed position within a given string S where the characters 'A', 'B', and 'C' have all appeared at least once. The string length N is also provided. To solve this, we can iterate through the string from its beginning. As we process each character, we need a way to track whether 'A', ...

Instantiation and Initial Setup Creating an empty dynamic array: std::vector<int> emptyVec; Initializing with a predefined set of values: std::vector<int> initialVec = {10, 20, 30, 40}; Setting a predefined size with a uniform default value: std::vector<int> sizedVec(5, -1); // Generates a vector with 5 elements, all set to -1 ...

Inheritance vs Composition for Data Management Consider a scenario where a class is designed to manage student grades. A common design mistake is inheriting from a standard container. Below is an implementation of VectorGradeAdapter, which inherits publicly from std::vector<int>. #include <iostream> #include <vector> #inclu ...

Linux Environment Preparation Efficient interaction with the operating system is critical for robotics development. Launch the terminal using Ctrl + Alt + T. Core navigation commands include: cd ~ # Navigate to home directory cd / # Access root directory Use pwd to verify the current path, mkdir -p catkin_ws/src to prepare the work ...

Concurrency and Threads Concurrency describes the simultaneous execution of several independent activities within one system. On a single-core CPU, only one instruction stream can run at any instant, yet the operating system rapidly switches among tasks, giving the illusion of parallelism. Each switch incurs a context-switch cost: the current s ...

Number Theory Utilities Greatest Common Divisor int gcd(int a, int b) { while (b) { int temp = b; b = a % b; a = temp; } return a; } Least Common Multiple int lcm(int a, int b) { return a / gcd(a, b) * b; } Fast Exponentiation long long power(long long base, long long exp) { long long result = 1; ...