https://alldaystech.com/ Latest guides and updates from All Days Tech. en-us Custom Python Feed Generator Mon, 31 Aug 2026 00:00:00 +0000 https://alldaystech.com/guides/software-development/break-down-features-into-user-stories-step-by-step https://alldaystech.com/guides/software-development/break-down-features-into-user-stories-step-by-step Mon, 31 Aug 2026 00:00:00 +0000 A practical method for turning large features into small, valuable, testable user stories using user goals, workflow mapping, vertical slices, acceptance criteria, dependencies, and delivery sequencing. Norbert Sowinski Software Development https://alldaystech.com/guides/software-development/choose-database-relational-vs-document-vs-key-value https://alldaystech.com/guides/software-development/choose-database-relational-vs-document-vs-key-value Mon, 31 Aug 2026 00:00:00 +0000 A practical guide to choosing a database by comparing relational, document, and key-value models across relationships, transactions, query flexibility, scalability, consistency, indexing, and operational tradeoffs. Norbert Sowinski Software Development https://alldaystech.com/guides/software-development/estimate-software-work-avoid-overcommitment-techniques https://alldaystech.com/guides/software-development/estimate-software-work-avoid-overcommitment-techniques Mon, 31 Aug 2026 00:00:00 +0000 A practical guide to estimating software work with uncertainty ranges, decomposition, historical data, confidence levels, capacity planning, dependency analysis, buffers, and commitment discipline. Norbert Sowinski Software Development https://alldaystech.com/guides/software-development/event-driven-architecture-queues-vs-streams-basics https://alldaystech.com/guides/software-development/event-driven-architecture-queues-vs-streams-basics Mon, 31 Aug 2026 00:00:00 +0000 A practical introduction to event-driven architecture covering message queues, streams, delivery semantics, consumer groups, ordering, retries, replay, retention, scaling, and how to choose the right model. Norbert Sowinski Software Development https://alldaystech.com/guides/software-development/release-notes-that-help-users-templates-workflow https://alldaystech.com/guides/software-development/release-notes-that-help-users-templates-workflow Mon, 31 Aug 2026 00:00:00 +0000 A practical guide to writing useful software release notes with clear structure, user impact, migration guidance, deprecations, screenshots, templates, ownership, review, automation, and publishing workflows. Norbert Sowinski Software Development https://alldaystech.com/guides/software-development/testing-strategy-real-projects-what-to-automate-first https://alldaystech.com/guides/software-development/testing-strategy-real-projects-what-to-automate-first Mon, 31 Aug 2026 00:00:00 +0000 A practical guide to choosing which tests to automate first using business risk, regression frequency, feedback speed, maintenance cost, execution reliability, and the boundaries most likely to fail. Norbert Sowinski Software Development https://alldaystech.com/guides/programming-languages/big-o-in-practice-choose-data-structures-fast https://alldaystech.com/guides/programming-languages/big-o-in-practice-choose-data-structures-fast Sun, 30 Aug 2026 00:00:00 +0000 A practical guide to Big-O notation and choosing arrays, hash maps, sets, linked lists, queues, stacks, heaps, and trees according to real application operations. Norbert Sowinski Programming Languages https://alldaystech.com/guides/programming-languages/build-simple-cli-tool-argument-parsing-exit-codes https://alldaystech.com/guides/programming-languages/build-simple-cli-tool-argument-parsing-exit-codes Sun, 30 Aug 2026 00:00:00 +0000 A practical guide to command-line tool design covering arguments, flags, subcommands, validation, stdout and stderr, exit codes, help text, automation, signals, and predictable CLI behavior. Norbert Sowinski Programming Languages https://alldaystech.com/guides/programming-languages/refactor-legacy-code-safely-small-steps-tests https://alldaystech.com/guides/programming-languages/refactor-legacy-code-safely-small-steps-tests Sun, 30 Aug 2026 00:00:00 +0000 A practical guide to refactoring legacy code with characterization tests, seams, dependency isolation, small reversible changes, incremental extraction, and continuous regression checks. Norbert Sowinski Programming Languages https://alldaystech.com/guides/programming-languages/regex-for-everyday-developers-practical-patterns https://alldaystech.com/guides/programming-languages/regex-for-everyday-developers-practical-patterns Sun, 30 Aug 2026 00:00:00 +0000 A practical regex guide covering literals, anchors, classes, quantifiers, groups, alternation, extraction, replacement, validation, lookarounds, escaping, debugging, portability, and performance. Norbert Sowinski Programming Languages https://alldaystech.com/guides/software-development/api-design-for-change-versioning-deprecation-compatibility https://alldaystech.com/guides/software-development/api-design-for-change-versioning-deprecation-compatibility Sun, 30 Aug 2026 00:00:00 +0000 A practical guide to evolving APIs safely with additive changes, compatibility rules, explicit versioning, deprecation periods, migration plans, sunset communication, and consumer-aware rollout. Norbert Sowinski Software Development https://alldaystech.com/guides/software-development/code-review-checklist-small-teams-quality-security https://alldaystech.com/guides/software-development/code-review-checklist-small-teams-quality-security Sun, 30 Aug 2026 00:00:00 +0000 A practical code review checklist for small teams covering correctness, scope, tests, security, data integrity, maintainability, performance, observability, migrations, deployment risk, and reviewer communication. Norbert Sowinski Software Development https://alldaystech.com/guides/software-development/write-technical-documentation-developers-use-templates https://alldaystech.com/guides/software-development/write-technical-documentation-developers-use-templates Sun, 30 Aug 2026 00:00:00 +0000 A practical guide to writing useful developer documentation with templates for README files, setup guides, API references, runbooks, architecture notes, ADRs, troubleshooting, and ongoing maintenance. Norbert Sowinski Software Development https://alldaystech.com/guides/programming-languages/async-programming-promises-futures-coroutines-beginners https://alldaystech.com/guides/programming-languages/async-programming-promises-futures-coroutines-beginners Sat, 29 Aug 2026 00:00:00 +0000 A beginner-friendly guide to asynchronous programming covering promises, futures, coroutines, async/await, event loops, schedulers, cancellation, timeouts, errors, concurrency, and structured async code. Norbert Sowinski Programming Languages https://alldaystech.com/guides/programming-languages/error-handling-patterns-exceptions-vs-result-types https://alldaystech.com/guides/programming-languages/error-handling-patterns-exceptions-vs-result-types Sat, 29 Aug 2026 00:00:00 +0000 A practical language-agnostic guide to choosing between exceptions and Result types, designing typed errors, preserving causes, defining recovery boundaries, handling validation, retries, async failures, and logging. Norbert Sowinski Programming Languages https://alldaystech.com/guides/programming-languages/read-and-debug-stack-traces-language-agnostic https://alldaystech.com/guides/programming-languages/read-and-debug-stack-traces-language-agnostic Sat, 29 Aug 2026 00:00:00 +0000 A practical guide to understanding stack traces across programming languages, including exception messages, stack frames, nested causes, async boundaries, library code, source maps, symbols, and root-cause debugging. Norbert Sowinski Programming Languages https://alldaystech.com/guides/programming-languages/unicode-text-encoding-for-developers-avoid-bugs https://alldaystech.com/guides/programming-languages/unicode-text-encoding-for-developers-avoid-bugs Sat, 29 Aug 2026 00:00:00 +0000 A practical guide to Unicode, UTF-8, UTF-16, code points, grapheme clusters, combining marks, normalization, emoji, mojibake, database text handling, and safe text-processing boundaries. Norbert Sowinski Programming Languages https://alldaystech.com/guides/programming-languages/work-with-json-safely-validation-schemas-defensive-parsing https://alldaystech.com/guides/programming-languages/work-with-json-safely-validation-schemas-defensive-parsing Sat, 29 Aug 2026 00:00:00 +0000 A practical guide to parsing JSON defensively, validating schemas and business rules, controlling unknown fields, handling duplicate keys, applying limits, and designing trustworthy API boundaries. Norbert Sowinski Programming Languages https://alldaystech.com/guides/internet-of-things/esp32-beginner-pitfalls-setup-power-debugging https://alldaystech.com/guides/internet-of-things/esp32-beginner-pitfalls-setup-power-debugging Thu, 27 Aug 2026 00:00:00 +0000 A practical ESP32 troubleshooting guide covering board selection, USB cables, serial ports, boot mode, unstable power, brownout resets, GPIO mistakes, strapping pins, Wi-Fi problems, deep sleep, and systematic debugging. Norbert Sowinski Internet Of Things https://alldaystech.com/guides/internet-of-things/iot-prototype-to-production-scaling-maintenance-lifecycle https://alldaystech.com/guides/internet-of-things/iot-prototype-to-production-scaling-maintenance-lifecycle Thu, 27 Aug 2026 00:00:00 +0000 A practical roadmap from IoT prototype to production covering hardware revisions, manufacturing, provisioning, backend scaling, OTA updates, fleet monitoring, maintenance, support, replacement, and secure retirement. Norbert Sowinski Internet Of Things https://alldaystech.com/guides/mobile-development/accessibility-for-mobile-apps-developer-checklist https://alldaystech.com/guides/mobile-development/accessibility-for-mobile-apps-developer-checklist Thu, 27 Aug 2026 00:00:00 +0000 A practical mobile accessibility guide covering semantic controls, VoiceOver, TalkBack, focus order, touch targets, gestures, text scaling, contrast, reduced motion, forms, custom components, accessibility testing, and release checks. Norbert Sowinski Mobile Development https://alldaystech.com/guides/mobile-development/deep-linking-universal-links-app-links-step-by-step https://alldaystech.com/guides/mobile-development/deep-linking-universal-links-app-links-step-by-step Thu, 27 Aug 2026 00:00:00 +0000 Learn how verified mobile deep links work on iOS and Android, including Universal Links, App Links, AASA, Digital Asset Links, routing, verification, fallbacks, testing, and common configuration mistakes. Norbert Sowinski Mobile Development https://alldaystech.com/guides/mobile-development/mobile-app-onboarding-ux-patterns-activation-retention https://alldaystech.com/guides/mobile-development/mobile-app-onboarding-ux-patterns-activation-retention Thu, 27 Aug 2026 00:00:00 +0000 A practical mobile onboarding guide covering activation events, progressive onboarding, value-first experiences, account creation, permissions, empty states, personalization, checklists, lifecycle messaging, analytics, experiments, and retention. Norbert Sowinski Mobile Development https://alldaystech.com/guides/mobile-development/mobile-performance-profiling-fix-ui-jank https://alldaystech.com/guides/mobile-development/mobile-performance-profiling-fix-ui-jank Thu, 27 Aug 2026 00:00:00 +0000 A practical workflow for diagnosing dropped frames and stuttering mobile interfaces using frame timelines, CPU traces, layout inspection, GPU profiling, memory analysis, release builds, and repeatable performance tests. Norbert Sowinski Mobile Development https://alldaystech.com/guides/mobile-development/offline-first-mobile-apps-sync-conflict-resolution https://alldaystech.com/guides/mobile-development/offline-first-mobile-apps-sync-conflict-resolution Thu, 27 Aug 2026 00:00:00 +0000 A practical guide to offline-first mobile architecture covering local databases, optimistic updates, outbox queues, background synchronization, retries, versioning, tombstones, conflict detection, merging, and user-visible sync states. Norbert Sowinski Mobile Development https://alldaystech.com/guides/mobile-development/push-notifications-opt-in-segmentation-timing https://alldaystech.com/guides/mobile-development/push-notifications-opt-in-segmentation-timing Thu, 27 Aug 2026 00:00:00 +0000 A practical mobile push notification guide covering permission timing, pre-permission UX, APNs and FCM token management, segmentation, preferences, quiet hours, frequency caps, deep links, delivery analytics, and responsible re-engagement. Norbert Sowinski Mobile Development https://alldaystech.com/guides/mobile-development/reduce-mobile-app-size-android-ios-techniques https://alldaystech.com/guides/mobile-development/reduce-mobile-app-size-android-ios-techniques Thu, 27 Aug 2026 00:00:00 +0000 A practical mobile app size guide covering Android App Bundles, R8, resource shrinking, native libraries, image and font optimization, iOS app thinning, asset catalogs, downloadable content, dependency audits, and automated size budgets. Norbert Sowinski Mobile Development https://alldaystech.com/guides/mobile-development/secure-mobile-storage-keychain-vs-keystore-mistakes https://alldaystech.com/guides/mobile-development/secure-mobile-storage-keychain-vs-keystore-mistakes Thu, 27 Aug 2026 00:00:00 +0000 Learn what belongs in iOS Keychain, what Android Keystore actually protects, how to store tokens and encrypted app data, when to require biometrics, how backups affect secrets, and which storage mistakes expose mobile credentials. Norbert Sowinski Mobile Development https://alldaystech.com/guides/mobile-development/testing-mobile-apps-on-a-budget-unit-ui-e2e https://alldaystech.com/guides/mobile-development/testing-mobile-apps-on-a-budget-unit-ui-e2e Thu, 27 Aug 2026 00:00:00 +0000 Build a practical mobile testing strategy with many fast unit tests, focused integration coverage, a small set of UI tests, critical end-to-end smoke tests, deterministic fixtures, CI, emulators, simulators, and carefully selected physical devices. Norbert Sowinski Mobile Development https://alldaystech.com/guides/internet-of-things/battery-life-estimation-iot-sensors-calculations https://alldaystech.com/guides/internet-of-things/battery-life-estimation-iot-sensors-calculations Tue, 25 Aug 2026 00:00:00 +0000 Learn to estimate IoT battery life from duty cycle and average current, then correct the ideal result for usable capacity, radio pulses, voltage drop, temperature, self-discharge, regulator losses, retries, aging, and real measurements. Norbert Sowinski Internet Of Things https://alldaystech.com/guides/internet-of-things/edge-computing-for-iot-when-to-process-on-device https://alldaystech.com/guides/internet-of-things/edge-computing-for-iot-when-to-process-on-device Tue, 25 Aug 2026 00:00:00 +0000 A practical guide to deciding whether IoT data should be processed on the device, at an edge gateway, or in the cloud based on latency, bandwidth, privacy, offline operation, hardware resources, energy, security, and maintainability. Norbert Sowinski Internet Of Things https://alldaystech.com/guides/internet-of-things/iot-data-pipeline-design-telemetry-to-dashboard https://alldaystech.com/guides/internet-of-things/iot-data-pipeline-design-telemetry-to-dashboard Tue, 25 Aug 2026 00:00:00 +0000 A practical IoT data-pipeline guide covering device telemetry, MQTT or HTTP ingestion, validation, normalization, stream processing, storage, alerting, dashboards, retention, observability, and failure handling. Norbert Sowinski Internet Of Things https://alldaystech.com/guides/internet-of-things/secure-iot-devices-firmware-credentials-tls https://alldaystech.com/guides/internet-of-things/secure-iot-devices-firmware-credentials-tls Tue, 25 Aug 2026 00:00:00 +0000 A practical IoT security guide covering signed firmware, secure boot, rollback protection, unique device credentials, secret storage and rotation, TLS, certificate validation, mutual authentication, least privilege, monitoring, and device decommissioning. Norbert Sowinski Internet Of Things https://alldaystech.com/guides/internet-of-things/smart-home-automation-reliability-triggers-failsafes https://alldaystech.com/guides/internet-of-things/smart-home-automation-reliability-triggers-failsafes Tue, 25 Aug 2026 00:00:00 +0000 Build smart-home automations that survive sensor errors, network outages, cloud failures, delayed state, device restarts, duplicate triggers, and unavailable hubs using local control, timeouts, safe defaults, retries, watchdogs, and manual overrides. Norbert Sowinski Internet Of Things https://alldaystech.com/guides/devops-sysadmin/automated-backups-linux-servers-verify-restore-drills https://alldaystech.com/guides/devops-sysadmin/automated-backups-linux-servers-verify-restore-drills Mon, 24 Aug 2026 00:00:00 +0000 Build a practical Linux backup workflow with automated scheduling, encrypted off-host storage, retention, database-safe backups, integrity checks, failure monitoring, recovery objectives, and regular restore drills. Norbert Sowinski Devops Sysadmin https://alldaystech.com/guides/devops-sysadmin/kubernetes-for-small-projects-when-it-helps-when-not https://alldaystech.com/guides/devops-sysadmin/kubernetes-for-small-projects-when-it-helps-when-not Mon, 24 Aug 2026 00:00:00 +0000 A practical decision guide for small teams evaluating Kubernetes: workloads, replicas, deployments, networking, autoscaling, storage, observability, upgrades, failure modes, operational cost, and simpler alternatives. Norbert Sowinski Devops Sysadmin https://alldaystech.com/guides/devops-sysadmin/sre-for-beginners-slis-slos-error-budgets https://alldaystech.com/guides/devops-sysadmin/sre-for-beginners-slis-slos-error-budgets Mon, 24 Aug 2026 00:00:00 +0000 A practical beginner guide to service level indicators, service level objectives, error budgets, availability, latency, good-event ratios, burn rate, SLO monitoring, and reliability policies. Norbert Sowinski Devops Sysadmin https://alldaystech.com/guides/internet-of-things/choose-iot-connectivity-wifi-vs-ble-vs-lorawan https://alldaystech.com/guides/internet-of-things/choose-iot-connectivity-wifi-vs-ble-vs-lorawan Mon, 24 Aug 2026 00:00:00 +0000 Compare Wi-Fi, Bluetooth Low Energy, and LoRaWAN for IoT projects by range, data rate, battery life, latency, infrastructure, topology, security, smartphone support, and deployment complexity. Norbert Sowinski Internet Of Things https://alldaystech.com/guides/internet-of-things/mqtt-explained-topics-qos-retained-messages-security https://alldaystech.com/guides/internet-of-things/mqtt-explained-topics-qos-retained-messages-security Mon, 24 Aug 2026 00:00:00 +0000 Learn MQTT from the publish/subscribe model through topic hierarchies, wildcard subscriptions, QoS 0/1/2, retained state, sessions, Last Will messages, TLS, authentication, authorization, and practical IoT security. Norbert Sowinski Internet Of Things https://alldaystech.com/guides/devops-sysadmin/centralized-logging-small-stack-what-to-collect https://alldaystech.com/guides/devops-sysadmin/centralized-logging-small-stack-what-to-collect Sun, 23 Aug 2026 00:00:00 +0000 Build a lightweight centralized logging pipeline with structured application logs, Grafana Alloy, Loki, Grafana, sensible labels, correlation IDs, retention, redaction, useful searches, dashboards, and alerts. Norbert Sowinski Devops Sysadmin https://alldaystech.com/guides/devops-sysadmin/linux-troubleshooting-playbook-disk-cpu-memory-network https://alldaystech.com/guides/devops-sysadmin/linux-troubleshooting-playbook-disk-cpu-memory-network Sun, 23 Aug 2026 00:00:00 +0000 A practical Linux incident playbook for disk exhaustion, high CPU and load, memory pressure, swap, OOM kills, networking, DNS, sockets, systemd services, and logs. Norbert Sowinski Devops Sysadmin https://alldaystech.com/guides/devops-sysadmin/minimal-monitoring-stack-metrics-alerts-oncall https://alldaystech.com/guides/devops-sysadmin/minimal-monitoring-stack-metrics-alerts-oncall Sun, 23 Aug 2026 00:00:00 +0000 Build a small but useful monitoring stack with Prometheus, Grafana, Alertmanager, host and application metrics, external availability checks, actionable alerts, runbooks, escalation, and simple on-call practices. Norbert Sowinski Devops Sysadmin https://alldaystech.com/guides/devops-sysadmin/secrets-management-basics-env-vars-vaults-rotation https://alldaystech.com/guides/devops-sysadmin/secrets-management-basics-env-vars-vaults-rotation Sun, 23 Aug 2026 00:00:00 +0000 A practical secrets-management guide for small teams covering environment variables, centralized secret stores, least privilege, runtime delivery, auditing, versioning, zero-downtime rotation, revocation, and leak response. Norbert Sowinski Devops Sysadmin https://alldaystech.com/guides/devops-sysadmin/zero-downtime-deployments-blue-green-vs-rolling https://alldaystech.com/guides/devops-sysadmin/zero-downtime-deployments-blue-green-vs-rolling Sun, 23 Aug 2026 00:00:00 +0000 Compare blue-green and rolling deployments for small web apps, including traffic switching, readiness, graceful shutdown, rollback, database compatibility, capacity, health checks, and safe deployment monitoring. Norbert Sowinski Devops Sysadmin https://alldaystech.com/guides/data-science/ab-testing-small-traffic-experiment-design https://alldaystech.com/guides/data-science/ab-testing-small-traffic-experiment-design Fri, 21 Aug 2026 00:00:00 +0000 A practical guide to trustworthy experiments when traffic is limited: MDE, power, duration, randomization, focused metrics, guardrails, SRM checks, peeking, variance reduction, and stop-or-run decisions. Norbert Sowinski Data Science https://alldaystech.com/guides/data-science/csv-to-dashboard-lightweight-analytics-pipeline https://alldaystech.com/guides/data-science/csv-to-dashboard-lightweight-analytics-pipeline Fri, 21 Aug 2026 00:00:00 +0000 Build a practical CSV analytics workflow with validation, pandas cleaning, Parquet storage, DuckDB queries, reusable aggregates, Streamlit caching, automated refreshes, and production-friendly data quality checks. Norbert Sowinski Data Science https://alldaystech.com/guides/data-science/explain-model-predictions-shap-vs-permutation-importance https://alldaystech.com/guides/data-science/explain-model-predictions-shap-vs-permutation-importance Fri, 21 Aug 2026 00:00:00 +0000 Learn when to use SHAP for local prediction explanations, when permutation importance is better for global performance dependence, and why correlated features, evaluation data, background data, and metric choice matter. Norbert Sowinski Data Science https://alldaystech.com/guides/data-science/time-series-backtesting-basics-seasonality-drift https://alldaystech.com/guides/data-science/time-series-backtesting-basics-seasonality-drift Fri, 21 Aug 2026 00:00:00 +0000 Learn how to backtest time-series models realistically with chronological folds, expanding and sliding windows, correct forecast horizons, seasonal baselines, leakage-safe features, drift analysis, and horizon-specific metrics. Norbert Sowinski Data Science https://alldaystech.com/guides/devops-sysadmin/production-ready-dockerfile-small-web-apps https://alldaystech.com/guides/devops-sysadmin/production-ready-dockerfile-small-web-apps Fri, 21 Aug 2026 00:00:00 +0000 Build smaller, safer and more reproducible container images with multi-stage builds, deterministic dependencies, non-root execution, BuildKit secrets, health checks, proper process startup, caching, and runtime hardening. Norbert Sowinski Devops Sysadmin https://alldaystech.com/guides/data-science/eda-checklist-messy-real-world-datasets https://alldaystech.com/guides/data-science/eda-checklist-messy-real-world-datasets Thu, 20 Aug 2026 00:00:00 +0000 A practical EDA workflow for messy datasets: verify schema, profile missingness, find duplicates, validate ranges, normalize categories and dates, investigate outliers, inspect relationships, catch leakage, and document data-quality decisions. Norbert Sowinski Data Science