I want secret leakage blocked before it reaches a remote repository. Local pre-commit hooks are not enough by themselves, but they cut down accidental exposure and teach the team what not to commit. The server-side or CI scan then becomes the final ga

Certificate expiry outages are avoidable with boring automation and good alerting. I use automatic renewal, post-renew validation hooks, and external checks that warn well before expiry. TLS is not finished once the first certificate works.

Diffable data sources modernize UITableView and UICollectionView, automatically calculating and animating changes. Instead of manually calling insert/delete methods, I create snapshots with current state and apply them. The framework diffs snapshots a

iOS 13 introduced scene-based lifecycle for multi-window support on iPad. The App and Scene delegates handle different lifecycle events. SceneDelegate manages individual scenes—windows on iPad or the single window on iPhone. It responds to state trans

Multi-tenancy serves multiple customers (tenants) from single application instance. Schema-per-tenant isolates data in separate databases. Shared schema with tenant ID column partitions data within tables. Discriminator-based approach uses JPA filters

I use a review checklist to make sure basic controls are present before a service ships: auth, logging, secrets, dependency scanning, backups, and least privilege. Checklists do not replace expertise, but they prevent avoidable omissions. The best one

Rack middleware processes HTTP requests/responses in Rails' stack. Middleware sits between web server and application, modifying requests before they reach controllers. I build custom middleware for logging, authentication, rate limiting, request modi

CSS specificity determines which styles apply when multiple rules target the same element. I calculate specificity as (inline, IDs, classes/attributes/pseudo-classes, elements/pseudo-elements). Inline styles have highest specificity at 1000. ID select

Kubernetes orchestrates containerized workloads at scale. A Pod is the smallest deployable unit, wrapping one or more containers. Deployments manage Pod replicas with declarative updates and rollbacks. The spec.replicas field sets desired Pod count. s

Rails caching dramatically improves performance by avoiding expensive computations and queries. Fragment caching caches view partials. Russian doll caching nests cache fragments for efficient invalidation. Low-level caching stores arbitrary data. Rail

Packet capture is most useful when it is scoped enough to answer a question quickly. I capture by host, port, subnet, or flag pattern rather than grabbing everything and hoping to sort it out later. Storage, privacy, and time all argue for precision.

StoreKit enables selling digital goods and subscriptions within iOS apps. I request product info from App Store Connect with product identifiers, then display prices in the user's currency. Purchase flows use SKPaymentQueue to add transactions, which