Intermediate terms
Rust Smart Pointers (Box, Rc, Arc, RefCell)
2
Smart pointers wrap heap allocations with ownership semantics: Box owns one value, Rc/Arc share ownership, and RefCell adds runtime-checked interior mutability.
1d ago
rust intermediate
Rust Iterator Adapters
Iterator adapters are lazy combinators like map and filter that transform iterators without doing work until a consumer drives them.
3d ago
rust intermediate
Regex Escape Sequences
PHP 4.1+
Backslash sequences in regex that either match special characters literally or represent character classes, anchors, and control characters.
5d ago
regex intermediate
Rust Pattern Matching
2
Rust's match and if let destructure values and enforce exhaustive handling of every variant at compile time.
5d ago
rust intermediate
Rust Traits
2
Traits define shared behavior that types opt into explicitly, enabling polymorphism through composition rather than class inheritance.
5d ago
rust intermediate
Reasoning Models & Test-Time Compute
A class of LLMs trained to allocate extra inference-time compute to internal reasoning before answering, achieving large gains on math, code, and logic at the cost of latency and tokens.
1mo ago
ai_ml intermediate
Resource Hints (preconnect, prefetch, preload)
HTML link attributes that instruct the browser to take early action on resources — opening connections, fetching future pages, or loading critical assets before they are discovered in HTML parsing.
2mo ago
performance intermediate
RabbitMQ Concepts
RabbitMQ is an AMQP message broker with flexible routing via exchanges — direct, topic, fanout, and headers routing enables complex message dispatch patterns.
3mo ago
messaging intermediate
RabbitMQ Fundamentals
PHP 7.0+
A message broker implementing the AMQP protocol — producers publish to exchanges, exchanges route messages to queues via bindings, and consumers pull from queues — providing flexible routing, acknowledgements, and dead-letter handling.
3mo ago
messaging intermediate
Race Condition
4
A race condition occurs when the outcome of a program depends on the relative timing of concurrent operations — two threads reading and writing shared state without coordination.
3mo ago
concurrency intermediate
RAG — Retrieval-Augmented Generation
1
An LLM architecture that fetches relevant documents from an external knowledge base before generating a response, grounding answers in retrieved facts rather than training data alone.
3mo ago
ai_ml intermediate
Reducing Cyclomatic Complexity Techniques
Cyclomatic complexity counts independent code paths — reduce it by early returns, extracting conditions to named functions, using lookup tables, and replacing switch/if chains with polymorphism.
3mo ago
quality intermediate
Refactoring Boolean Flag Parameters
Boolean flags as function parameters obscure intent — replace with enums, separate functions, or named options objects for self-documenting APIs.
3mo ago
quality intermediate
register_globals Era & Why It Was Dangerous
PHP 3.0+
PHP 4 shipped with register_globals=On by default — injecting GET/POST/COOKIE values as global variables, making PHP synonymous with insecurity until it was off-by-default in PHP 4.2.
3mo ago
php intermediate
Remote Code Execution (RCE)
A vulnerability allowing an attacker to run arbitrary code on the server — the most severe class of web vulnerability, typically achieved through eval(), unserialise(), file upload flaws, or OS command injection.
3mo ago
security intermediate
requestAnimationFrame — Smooth Animations
HTML5
requestAnimationFrame(callback) schedules a function to run before the browser's next repaint — the correct way to animate in JavaScript, producing smooth 60fps motion and automatically pausing when the tab is hidden.
3mo ago
javascript intermediate
ResizeObserver API
HTML5
ResizeObserver watches element size changes without polling — more efficient than resize event listeners and works for any element, not just the window.
3mo ago
javascript intermediate
Role-Based Access Control (RBAC)
An authorisation model where permissions are assigned to roles, and roles are assigned to users — checking 'can this role perform this action?' rather than 'can this specific user?'
3mo ago
security intermediate
register_globals Risk & Legacy Code
PHP 3.0+
register_globals automatically created PHP variables from GET/POST/COOKIE data — removed in PHP 5.4. Legacy code using it is critically vulnerable to variable injection.
3mo ago
security intermediate
Reactive Patterns — Observer & Pub/Sub in JavaScript
ES2015
EventEmitter, CustomEvent, and pub/sub patterns coordinate state changes across components without tight coupling — common in PHP-rendered pages with JS islands.
3mo ago
javascript intermediate