Developer Dives Deep into Spring Framework During Week 9 of 100DaysOfCode

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A developer participating in the #100DaysOfCode challenge dedicated Week 9 to deepening their understanding of the Spring Framework rather than building new features. The week focused on core backend concepts including Spring AOP, JDBC, Caching, Reactive Programming, and Concurrency. A key insight gained was how Spring uses Aspect-Oriented Programming and proxy patterns to apply cross-cutting concerns like caching without embedding that logic directly in business methods. The developer also explored reactive design patterns, examining why non-blocking architecture matters for building scalable, modern applications. Alongside technical learning, they continued applying for backend engineering roles and preparing for technical interviews.

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Developer Turns Discord Bot Experiment into Full AIOps Platform AcornOps

A developer maintaining the open-source project React ChatBotify began experimenting in mid-2025 with a Discord bot that could help troubleshoot infrastructure through conversation. The idea was shelved until January 2026, when a design thinking course reignited it through discussions with a collaborator named Ning. Together, they reimagined the concept beyond a simple chatbot, asking what a self-hosted, full-fledged AIOps platform would actually require. Months of iterative design and problem-solving led to the creation of AcornOps, a platform aimed at enabling AI to safely participate in operational tasks. The project is still evolving, with the team planning to share deeper details about its architecture, decisions, and lessons in a forthcoming article.

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ProgrammingDEV Community ·

Raku Programming Language Handles Infinite Sequences With Lazy Evaluation

Raku, a programming language, natively supports infinite sequences using the infinity symbol (∞) and lazy evaluation, computing values only when explicitly requested. Developers can define sequences like the Fibonacci series with a simple pattern rule and retrieve any element on demand without pre-calculating the entire list. The language also allows mapping and filtering operations on infinite sequences, such as squaring numbers or extracting prime values, using built-in methods like map and grep. A laziness check via the is-lazy method confirms that such sequences are evaluated on demand rather than upfront. This is the first part of a series exploring Raku's capabilities with infinite and lazy data structures.

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ProgrammingDEV Community ·

Developer Builds Blockchain Tool to Verify Dog Walks Using GPS Hashing on Solana

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ProgrammingDEV Community ·

How to Use Microsoft Graph API for O365 Shared Mailbox Test Automation

Testing email workflows such as OTP verification and password resets is essential for end-to-end automation, but traditional methods like UI logins and IMAP basic authentication are unreliable or deprecated in Microsoft 365. A more robust approach involves using the Microsoft Graph API with a Client Credentials flow, which allows programmatic mailbox access without triggering multi-factor authentication. Developers must register an app in Azure's Entra ID portal, configure the appropriate Mail.ReadWrite and Mail.Send permissions, and securely store credentials as environment variables in their CI/CD pipeline. Once authenticated, the API enables direct REST calls to read or send emails from a shared mailbox in milliseconds, eliminating the flakiness associated with browser-based Outlook automation. As a security measure, access can be scoped to a specific mailbox using an ApplicationAccessPolicy in Exchange Online PowerShell.

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