SShortSingh.
TopTechnologyAI & MLStartupsProgrammingScienceBusinessFinanceCrypto & Web3World

Programming

LatestTopDiscussed
0
ProgrammingDEV Community ·

TCP vs UDP: How Transport Protocols Determine Speed and Reliability

TCP and UDP are two core protocols operating at the Transport Layer of the OSI Model, each designed for different networking needs. TCP prioritizes reliability through a three-way handshake, packet acknowledgment, automatic retransmission, and flow control, making it ideal for file transfers, emails, and web browsing. UDP skips these checks entirely, offering connectionless, low-latency transmission suited for real-time applications like video calls and live streaming. The trade-off is clear: TCP guarantees complete data delivery but introduces latency, while UDP is faster but accepts the risk of occasional packet loss. This distinction explains why a downloaded file arrives intact every time, while a video call may occasionally glitch or drop frames.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

How Content Delivery Networks Solve the Problem of Physical Distance

A web application hosted in Virginia may perform flawlessly by all server metrics, yet still feel slow to users in India, Germany, or Brazil due to the sheer physical distance data must travel. A round-trip request between Bengaluru and Virginia can add 200–300 milliseconds of network latency on top of minimal server processing time. When a single page loads dozens of assets, each requiring its own round trip, those delays compound into several seconds of wait time. This is the core problem that Content Delivery Networks (CDNs) address by routing users to geographically closer edge locations, such as Mumbai instead of Virginia. Unlike previous optimizations targeting server workload or database efficiency, CDNs tackle a fundamentally different bottleneck: the speed of light across physical infrastructure.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

Why Skilled Developers Still Fail: The System Problems Behind Bad Projects

Talented developers and modern technology do not guarantee a successful software project, as failures often stem from systemic issues rather than individual incompetence. Unclear requirements, unchecked assumptions, and the habit of deferring problems create a chain of small decisions that accumulate into project collapse. Scope creep is a persistent threat, where a seemingly minor client request can ripple across databases, APIs, UI, and testing pipelines, multiplying workload significantly. When deadlines tighten, testing is frequently cut short, pushing undetected bugs into production and making fixes far more costly than early resolution would have been. The article argues that ignoring developer-raised concerns and setting unrealistic deadlines builds technical debt, ultimately undermining even the most capable engineering teams.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

Visual QA Agents Can Catch UI Bugs That AI-Generated Code Leaves Behind

AI coding tools can produce functional code that still breaks the visible user interface, with issues like misplaced buttons, overflowing components, or wrong tenant data slipping past unit tests. Visual QA agents address this by automating real user journeys in a browser, capturing screenshots, and comparing them against established baselines. Unlike traditional tests that check logic or API contracts, these agents detect regressions that are visual, contextual, and workflow-specific. Each agent is given a scoped mission covering specific routes, viewports, and user roles, generating reviewable evidence for CI pipelines. The approach is aimed at small teams and solo builders who need AI development speed without accumulating unchecked UI regression risk.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

Key Prompt Engineering Techniques Developers Can Use to Get Better AI Results

Prompt engineering is the practice of writing structured instructions to help large language models produce accurate and relevant outputs. Effective prompts typically include a defined role, context, a clear task, an output format, and constraints. Techniques such as few-shot prompting, chain-of-thought prompting, and prompt chaining help developers tackle complex tasks by providing examples, requesting step-by-step reasoning, and breaking work into smaller sequential prompts. Iterative refinement — progressively improving a prompt across multiple interactions — is also highlighted as a habit of professional developers. These approaches are applicable across common development workflows including code generation, debugging, documentation, and system design.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

Dev shares key lessons from building a production LMS with Node.js and AWS

A developer has detailed the technical decisions and hard-learned lessons from building a production Learning Management System used across web and mobile platforms. The system was built using Node.js with NestJS, MongoDB, AWS, Cloudflare, Docker, React/Next.js, and Flutter, serving students and tutors handling live classes, payments, and academic activities. The author found that Node.js handles I/O-heavy LMS workloads effectively, but that performance issues most often stemmed from poor database queries, missing indexes, and weak caching rather than the runtime itself. On the MongoDB side, treating schema design as optional led to problems, particularly when embedding high-growth data like attendance records inside parent documents instead of using dedicated collections. The post concludes that identifying and fixing the actual bottleneck — such as an unindexed query — is more effective than switching technology stacks entirely.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

How ReactJS Drives Business Value: Beyond the Standard Developer Pitch

A detailed analysis of ReactJS highlights how its virtual DOM and component-based architecture deliver measurable business outcomes, not just developer convenience. React's reconciliation algorithm applies only minimal DOM changes during user interactions, reducing sluggishness in ecommerce, dashboards, and live data tools, which directly impacts bounce rates and conversions. Reusable components allow teams to build and test UI elements once, then assemble new features faster, shrinking complexity and improving sprint velocity within months. React's state model also simplifies real-time UI features like live cart updates and as-you-type search, which have become baseline user expectations in 2025. However, the analysis cautions that React's benefits are most relevant for interaction-heavy applications, and that simpler static sites may actually perform better with alternatives like Astro or plain HTML.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

Developer finds three self-passing checks that were structurally incapable of ever failing

A developer at a fact-checking platform discovered three verifiers in their own codebase that always reported passing results regardless of actual correctness. One check compared a leap-year implementation against a line-for-line copy of itself, meaning both shared the same bug and agreed perfectly. A second verifier, on a page specifically about unfailing checks, constructed its expected result from the assertion count rather than the actual pass-or-fail verdict, displaying PASS 109/109 for two weeks while the real result was FAIL 106/109. A third check for Zipf's law used the wrong statistical estimator for two years, but all tests passed because the acceptable range was wide enough to accommodate any output the flawed estimator could produce. The author concludes that in all three cases, the assertion's expected value was derived from the very thing being tested, making failure structurally impossible.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

How HTTP/1.1, HTTP/2, and HTTP/3 Handle Head-of-Line Blocking Differently

Head-of-line blocking occurs when a slow request on a persistent HTTP/1.1 connection delays all subsequent requests behind it, since responses must be returned in the original request order. The only practical workaround under HTTP/1.1 was for browsers to open multiple parallel TCP connections per origin, typically capped around six, which introduced overhead and resource competition. HTTP/2 solved the application-layer problem by splitting a single TCP connection into independently identified streams, allowing responses to be interleaved and delivered out of order. However, TCP's single ordered byte stream still causes cross-stream blocking at the transport layer when a packet is lost. HTTP/3 addresses this remaining issue by running over QUIC, a transport protocol whose independent streams prevent one lost packet from stalling unrelated streams.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

How Bluesky's AT Protocol Rethinks Social Media Architecture at Scale

Bluesky's AT Protocol (ATProto) takes a federated approach to social infrastructure, giving each user a cryptographically signed personal data repository they fully control and can move between providers. Rather than relying on a single large database, the protocol separates functions across independent services: personal data stores, relays that aggregate public data, and app views that query and display content. This design sidesteps the consistency bottlenecks that force conventional social platforms into costly trade-offs between scalability and query capability. ATProto also decentralizes moderation by allowing anyone to run labeling services, letting users choose which moderation sources they trust. The architecture aims to enable platform competition and user portability without the lock-in that characterizes today's centralized social networks.

0 comments Read more at DEV Community
0
ProgrammingHacker News ·

Philippines Offshoring Industry Continues to Grow Despite AI Disruption

The Philippines' business process outsourcing sector is experiencing growth even as artificial intelligence advances reshape the global services industry. The country has long been a major hub for offshored work, including customer service and back-office operations. Despite concerns that AI automation would erode demand for such services, the industry appears to be holding its ground. The trend suggests that human-led outsourcing remains in demand, at least for now, alongside emerging technologies.

0 comments Read more at Hacker News
0
ProgrammingDEV Community ·

VNSGU TYBCA Sem 5: Three Shell Script Methods to Count Vowels and Convert Case

A technical guide published on DEV Community addresses VNSGU TYBCA Semester 5 Linux practical Set B, demonstrating how to count vowels and convert string case using shell scripting. Three distinct approaches are covered: a Bash for-loop with a case statement, the tr command combined with wc, and grep with wc. Each method achieves the same results — counting vowels and producing uppercase or lowercase output — but varies in complexity and the Linux tools involved. The for-loop and case approach is highlighted as the most suitable for exam settings where demonstrating core scripting logic is expected. The guide also notes that Bash parameter expansion features like the double-caret and double-comma operators may not work in older shell environments.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

How Next.js Error Boundaries and Observability Tools Prevent Silent UI Failures

In modern React Single Page Applications, unhandled JavaScript errors can silently blank the screen on the client side, leaving backend servers with no record of the failure. Unlike traditional server-rendered apps that return visible error pages, SPAs can lose users to frontend bugs without any engineering team awareness. Next.js addresses this through file-system-based error boundaries using error.tsx files, which isolate failures to specific route segments while keeping the rest of the UI functional. Pairing these error boundaries with observability platforms like Sentry or Datadog allows teams to capture browser-side error data, including OS, browser version, and network context, and route it back to engineers. Together, graceful degradation and frontend telemetry form a two-layer strategy for building resilient, debuggable Next.js applications.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

MCP Resource Primitive Helps LangGraph Agents Retain Conversation Context

A developer debugging a LangGraph-based support bot discovered the agent was losing conversation context after a few turns, forcing users to repeat information. The root cause was that the agent's knowledge graph was not being properly updated or retrieved across multiple tool calls. MCP's Resource primitive addresses this by providing a centralized, persistent store of information that agents can read and update throughout a conversation. In a practical example, the developer used a Resource to store user device details — such as device type, OS, and error messages — enabling the bot to give consistent, context-aware responses. The author also cautions against over-engineering these Resources, as excessive complexity can make the knowledge graph fragile and difficult to maintain.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

How to Secure Laravel Webhooks Using HMAC Signatures and Timing-Attack Prevention

Webhooks require exposing public POST endpoints, making them vulnerable to fake payload attacks that could allow bad actors to manipulate application data. To counter this, developers can implement HMAC-based signature verification, where the provider and the receiving server independently hash the payload using a shared secret key and compare results. Laravel middleware can enforce this check at the application's edge, rejecting any request with a missing or invalid signature with a 401 Unauthorized response. A critical implementation detail is using PHP's hash_equals() function instead of standard string comparison, which prevents timing attacks that could allow hackers to guess signatures incrementally. Pairing cryptographic verification with asynchronous queuing further strengthens webhook architecture in high-stakes financial and SaaS environments.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

Use Claude Code to Author OpenRewrite Recipes for Safe Large-Scale Java Migrations

Directly using AI agents like Claude Code to edit large Java codebases risks introducing hallucinated API calls, broken imports, and silent runtime bugs. A safer approach involves using Claude Code to generate deterministic OpenRewrite recipes that operate on Lossless Semantic Trees (LSTs), which are type-attributed AST structures rather than plain text. These AI-authored recipes can be unit-tested and refined before being executed via the rewrite-maven-plugin in a clean CI environment, ensuring reproducible and semantically accurate code changes. This method confines LLM non-determinism to the recipe authoring phase, keeping the actual production codebase transformation fully deterministic. The approach is particularly relevant for enterprise-scale migrations such as JDK 26 upgrades, Spring Boot 3+, or Jakarta EE transitions.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

How AI Pair Programming Tools Like Cursor Actually Understand Your Code

AI pair programming involves human developers collaborating with AI assistants to write, complete, and generate code, with tools like Cursor and Claude Code leading the shift. These assistants move beyond simple autocomplete toward handling entire coding tasks, freeing developers to focus on more complex and creative work. The core mechanism behind their understanding is a concept called an embedding — a numerical representation that captures the meaning and structure of code, functioning like a unique fingerprint. AI tools generate these embeddings by tokenizing and analyzing code using machine learning models, similar to how search engines index web pages. The approach aims to reduce development time, minimize errors, and improve overall code quality by giving the AI contextual awareness of a codebase.

0 comments Read more at DEV Community
0
ProgrammingHacker News ·

NBER Study Examines Long-Run Economic Impact of H-1B Immigration on the US

A working paper published by the National Bureau of Economic Research (NBER) investigates the long-term effects of H-1B visa immigration on the U.S. economy. The study, referenced in a July 2026 discussion on Hacker News, analyzes how high-skilled foreign workers admitted under the H-1B program influence broader economic outcomes. The H-1B visa is a non-immigrant work visa that allows U.S. employers to temporarily hire foreign workers in specialty occupations. The paper has attracted attention in technology and policy circles, where debates over skilled immigration and its economic consequences remain ongoing.

0 comments Read more at Hacker News
0
ProgrammingDEV Community ·

Developer builds client-side JWT decoder to prevent token leaks via online tools

A developer has warned that many popular online JWT decoder tools forward tokens to remote servers, creating a potential security leak for production credentials. In response, they built a browser-only tool that decodes JWT headers, payloads, and signatures entirely on the client side with no outgoing network requests. The tool also supports Base64, Base64URL, URL encoding, and multiple hashing algorithms including MD5 and SHA variants. It includes live expiration checking and syntax highlighting, and is available at jwt-base64-inspector.vercel.app. The project is accompanied by a dedicated JWT security guide hosted on the same domain.

0 comments Read more at DEV Community
0
ProgrammingDEV Community ·

How GitHub Accounts Get Compromised Without GitHub Ever Being Hacked

Modern attacks on GitHub rarely involve breaking into GitHub's own systems directly; instead, attackers exploit trusted third-party integrations, stolen OAuth tokens, or phishing to gain legitimate-looking access. A 2022 campaign illustrated this clearly, when attackers used stolen OAuth tokens from Heroku and Travis CI integrations to access private GitHub repositories via the GitHub API. GitHub confirmed it did not believe its own systems were breached in that incident. Phishing attacks have also proven effective, with fake login pages capable of relaying credentials and one-time codes in real time, though hardware security keys were found resistant to that technique. These cases highlight how credential theft and trusted-permission abuse can make malicious activity appear indistinguishable from normal, authorized use.

0 comments Read more at DEV Community
← NewerPage 260 of 1349Older →