Page 150 - Maxim Mironjuk

The console prints 0.30000000000000004, a price comparison fails, a sum of invoice line items is off by one cent. Floating point precision is not a JavaScript quirk, it is a consequence of IEEE 754, but it hits JavaScript developers especially often because the language only has a single number type. This article explains the cause and shows robust fixes.

The change buffer delays expensive random I/O for secondary indexes, and undo logs keep old row versions available for MVCC and rollback. Both mostly work completely unnoticed in the background, until a long-running transaction or a write spike suddenly turns one of them into the limiting factor.

A 4,000 word guide delivers depth, authority and topical coverage, but ChatGPT often ends up citing just two sentences from it. AI summaries favor compact, clearly stated core claims, while search engines still reward comprehensive content with ranking signals. Anyone who understands this tension can structure content to satisfy both requirements at once.

Multi-step forms lift conversion when they are executed cleanly from a UX perspective: a clear progress indicator, validation on every step instead of only at submit time, and reliable backward navigation without losing any data. With Alpine.js this pattern can be fully implemented without any external library.

A single GraphQL request can combine nested fields, multiple aliases and deep relations, generating as much database load as a thousand simple REST requests. Anyone who implements rate-limiting purely by counting requests per minute does not protect their API against exactly this kind of attack. Query complexity analysis scores every request by its actual cost before it is even executed.

A container that suddenly dies with exit code 137, no panic, no log output, no visible error, is one of the most frustrating Docker problems there is. In the vast majority of cases the Linux OOM killer is behind it, and the actual problem is rarely the code, it is a poorly estimated memory limit.

Worker Threads solve a real problem in Node.js: CPU-intensive computations otherwise block the single event loop thread and freeze the entire application. But communication between the main thread and a worker runs through postMessage with an any-typed payload, which quickly leads to runtime errors the compiler cannot see without deliberate typing.

Not every line of code deserves its own file inside a project. PhpStorm's Scratch Files allow quick experiments with full syntax highlighting and language support, completely detached from the current project, while Scratch Buffers serve as even shorter, unnamed scratch pads. Using both deliberately keeps the actual project clean.

Passkeys replace the classic password with a cryptographic key pair that the browser manages through the WebAuthn API. This article shows how a Nuxt application implements passkey registration and login, what role Nitro server routes play in generating the challenge, and why a fallback for older browsers is still necessary.

A valid TLS certificate alone does not protect a Magento store from clickjacking, MIME sniffing, or silent data leaks through the referrer header. This article shows in practice how HSTS, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, and CSP frame-ancestors work together, how to configure these headers correctly at the webserver or CDN layer instead of in application code, and how scanners like securityheaders.com grade the result.