Generic Programming Consider an example: How to implement a generic swap function? In C++, function overloading allows us to use the same function name for different types. For example: void Exchange(int& a, int& b) { int temp = a; a = b; b = temp; } void Exchange(double& a, double&...
Two fundamental Redis commands form the basis of distributed locking: SETNX and SETEX. SETNX key value sets the value only if the key does not exist. It returns 1 upon successful insertion and 0 if the key is already present. SETEX key seconds value assigns a value to a key while simultaneously conf...
Integrating the junrar dependency into a build configuration establishes the necessary parsing capabilities for RAR archives. The following Maven declaration resolves the required binaries. <dependency> <groupId>com.github.junrar</groupId> <artifactId>junrar</artifactId>...
When Kotlin files are compiled, top-level functions declared within them are converted into static methods. These methods are housed in a class named after the Kotlin file with a Kt suffix. For instance, a file named MathUtils.kt will produce a class named MathUtilsKt. // MathUtils.kt package com.ex...
Core Software Design Principles Open/Closed Principle Core Idea: Open for extension, closed for modification When extending application functionality, you should avoid modifying existing working production code. Instead, use abstractions (interfaces or abstract classes) to achieve pluggable behavior...
For developers, the core value lies in creating business logic and implementing functional requirements. However, we often spend valuable time on tedious server operations: configuration, deployment, patching, monitoring, scaling... Just to run a simple backend API, we may face a complex server mana...
Initializing Containers Loading a local image archive: docker load -i debian-base.img # Output: # 4e4e2a3f1c5b: Loading layer [==================================================>] 120.5MB/120.5MB # Loaded image: debian:bullseye docker image ls # REPOSITORY TAG IMAGE ID CREATED SIZE # debian bulls...
Loaders A loader acts as a transformer that processes and converts source code. Workflow A module's loader is configured in webpack.config.js. When the corresponding module file is encountered, its loader is triggered. The loader receives the module's file content as a source string. Using APIs prov...
Consider an infinite linear axis where every integer coordinate holds an initial value of zero. The task involves processing $n$ point increment operations followed by anwsering $m$ range sum queries. Given that coordinates may span $[-10^9, 10^9]$ while $n, m \leq 10^5$, direct array allocation is...
Given a string s, determine the length of the longest substring that contains no repeating characters. Example 1: Input: s = "abcabcbb" Output: 3 Explanation: The answer is "abc", with the length of 3. Example 2: Input: s = "bbbbb" Output: 1 Explanation: The answer is &...