Selenium and Python: A Practical Combination for Web Automation Testing

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Selenium is an open-source framework that automates web browser interactions, allowing developers and testers to simulate user actions across multiple browsers and operating systems. When paired with Python, it offers a beginner-friendly, low-code approach to building automated test scripts. The combination supports key testing types including functional, regression, and smoke testing, making it suitable for both startups and large enterprises. Selenium also integrates with CI/CD tools like Jenkins, enabling automated test execution whenever code changes are pushed. Its cross-browser compatibility, zero licensing cost, and strong community support have made it one of the most widely adopted automation testing frameworks in the software industry.

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Developer builds Brainfuck-to-JVM compiler from scratch using pure Node.js

A developer documenting JVM internals chose Brainfuck, the esoteric programming language created by Urban Müller in 1993, as a minimal test case for building a compiler from scratch. The project, called BrainJuck, aims to compile Brainfuck source code into valid JVM bytecode (.class files) runnable directly with the Java runtime. This first installment in a three-part series covers building an interpreter, which serves as the foundation for the full compiler. The interpreter parses Brainfuck's eight commands into an intermediate representation, handling loop jumps via a stack-based placeholder mechanism. No external dependencies or frameworks are used — only Node.js and its native test runner.

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

How One KNX Config Mistake Led to Better Home Assistant Motion Lighting

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ProgrammingDEV Community ·

How a Dead Man's Switch Can Alert You When Your Monitoring Stack Fails

A monitoring system has a critical blind spot: it cannot reliably detect its own failure, meaning outages can go unreported if the stack itself goes down. The solution is a 'dead man's switch' built using a Prometheus Watchdog alert with a condition that is always true, causing it to fire continuously as long as the pipeline is healthy. This constant alert is routed to an independent external heartbeat service, which expects regular check-ins from Alertmanager. If Prometheus, Alertmanager, or the delivery path fails, the heartbeat stops refreshing and the external service triggers a notification through a separate channel. The key principle is independence: the system watching for monitoring failure must run on infrastructure that is completely separate from the monitoring stack itself.

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