Angular Resolvers and Navigation Data
What a ResolveFn really does to navigation: the delay, reruns on param change, RedirectCommand for 404s, and why EMPTY or an error cancels it.
~6 min readread →
Developer interview notes & guides — Page 5
Focused explanations and longer guides, with worked scenarios, common mistakes and interview exercises across every chapter.
level:
Showing 97–120 of 200 articles
Choosing an RxJS Mapping Operator in Angular: Search, Save, Login
switchMap, mergeMap, concatMap or exhaustMap? One timeline of four requests shows what each operator does, and which fits search, save and login.
~6 min readread →
Angular Computed Signals and Derived Values
Why a cart total belongs in computed() and not a second signal, how Angular tracks dependencies lazily, and when linkedSignal fits.
~7 min readread →
Angular Signals and Immutable Collection Updates
Why push() on a signal's array leaves the screen stale, what Object.is equality means for update(), and how to edit nested lists without bugs.
~6 min readread →
Angular Standalone Components and Template Imports
How a standalone component's imports array works, the NG8001, NG8002 and NG8004 errors it prevents, and the directive that fails silently.
~6 min readread →
Angular Unsubscribe: Which Subscriptions Leak and How to Clean Up
Which Angular subscriptions leak and which end on their own, measured with a live Subject, plus takeUntilDestroyed, toSignal and the async pipe.
~6 min readread →
Docker Multi-Platform Images and Native Dependencies
How one tag serves amd64 and arm64, why native modules break across CPUs, and how to build multi-platform images by emulating or cross-compiling.
~6 min readread →
Docker Bind Mounts and Host Coupling
Bind mounts map a host path into a container: great for live code, risky for ownership, portability and security. See where each one bites.
~6 min readread →
Docker Entrypoint and Command Overrides
How ENTRYPOINT and CMD combine into one argv, what docker run arguments replace, and why appending sh to some images never gives you a shell.
~6 min readread →
Docker Health Checks and Useful Probes
How a HEALTHCHECK moves from starting to unhealthy, why plain Docker never restarts an unhealthy container, and what a good probe checks.
~6 min readread →
Docker Resource Limits and Application Capacity
Memory limits end in a silent OOM kill and CPU limits in throttling. Size a container so the runtime inside it agrees with the cgroup outside.
~6 min readread →
Docker Process Signals and Graceful Shutdown
Why docker stop sometimes takes the full timeout and ends in exit 137, and how PID 1, exec form and a SIGTERM handler fix shutdown.
~6 min readread →
Git Cherry-Pick and Patch-Based Backports
Backport a fix to a release branch with git cherry-pick -x, handle the conflict when it depends on an earlier commit, and spot duplicate patches.
~6 min readread →
Git Atomic Commits and Reviewable Changes
An atomic commit does one thing and still builds. Split mixed edits with git add -p, fold follow-up fixes in with --fixup, and revert precisely.
~6 min readread →
How to Resolve Git Merge Conflicts Correctly (with zdiff3)
Resolve a Git merge conflict by working out what each side meant. Read the base with zdiff3, avoid the keep-both trap and test the combined rule.
~6 min readread →
Git Ignore Rules and Already Tracked Files
A tracked file stays tracked after you add it to .gitignore. Untrack it with git rm --cached and warn teammates, whose pull deletes it.
~6 min readread →
Git Reflog and Recovering Lost References
Undo a bad reset --hard, restore a deleted branch or a dropped stash with git reflog and git fsck, and learn which lost work Git can't recover.
~6 min readread →
HTML Data Tables and Header Relationships
How th, scope, caption and headers/id tell a screen reader which headers describe a cell, with a two-level pricing table worked through.
~8 min readread →
CSS Flex Items and Unexpected Overflow
Why a flex item holding a long URL or code block won't shrink, what min-width: auto computes, and when min-width: 0 or minmax(0, 1fr) fixes it.
~6 min readread →
HTML Headings and Document Navigation
How screen reader users jump between headings, why levels should follow structure rather than font size, and how to fix skipped levels.
~6 min readread →
CSS Logical Properties for Direction-Aware Layout
Swap left and right for inline-start and inline-end so one stylesheet serves English, Arabic and vertical text, with a card converted.
~6 min readread →
HTML Responsive Images and Source Selection
How browsers pick a file from srcset using sizes and pixel density, when to use picture, and the math for a phone, a tablet and a laptop.
~6 min readread →
CSS Responsive Units and Content Constraints
When to use px, rem, em, %, ch, vw and dvh, how clamp() builds fluid type that still zooms, and why 100vh breaks on phones, with real numbers.
~6 min readread →
Java ArrayList Capacity and Performance
How ArrayList grows its backing array by 1.5x, why add is amortized O(1), and when ensureCapacity or a different list actually helps.
~8 min readread →
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