Terms starting with "C"
Client-Side Template Injection (CSTI)
Attacker-controlled input rendered as a template expression by a client-side framework (AngularJS, Vue, Handlebars), executing JavaScript in the victim's browser.
CWE-1336 OWASP A3:2021
1w ago
security advanced
7.5
Constitutional AI (CAI)
Anthropic's training methodology where models critique and revise their own outputs against a set of written principles, reducing reliance on human labellers for alignment.
1w ago
ai_ml advanced
CSS Injection & Data Exfiltration via Stylesheets
Attacker-controlled CSS injected into a page or stylesheet that exfiltrates data via attribute selectors and `url()` callbacks, defaces UI, or enables phishing — all without a single line of JavaScript.
CWE-79 OWASP A3:2021
1w ago
security advanced
6.5
cgroups — Linux Control Groups
A Linux kernel feature that groups processes and meters or limits their access to CPU, memory, I/O, network, and other resources — the core primitive that makes Docker, systemd, and Kubernetes resource limits possible.
3w ago
linux advanced
Covariance & Contravariance 4.7 Variance describes how subtype relationships on a type's components affect subtype relationships on the whole type — covariant types follow the direction, contravariant types reverse it.
4w ago
typescript advanced
Canonical URL (rel=canonical)
A <link rel='canonical'> tag that tells search engines which URL is the authoritative version of a page — preventing duplicate content from splitting ranking signals across multiple URLs.
1mo ago
frontend intermediate
Core Web Vitals
Google's three field-measured performance metrics — LCP (loading), INP (interactivity), CLS (visual stability) — used as direct search ranking signals since 2021.
1mo ago
performance intermediate
Cumulative Layout Shift (CLS)
A Core Web Vital that measures unexpected visual movement of page elements during load — caused by images without dimensions, late-injected content, and font swaps. Target: under 0.1.
1mo ago
performance intermediate
CSS Cascade Layers (@layer)
CSS @layer lets you explicitly define the order in which style groups are applied in the cascade — styles in a later layer always win over earlier ones regardless of specificity, eliminating specificity wars in large codebases.
1mo ago
frontend intermediate
CSS Grid Template Areas A CSS Grid feature that lets you name regions of a grid and assign elements to them by name, making complex layouts readable and maintainable without calculating column/row numbers.
1mo ago
frontend beginner
Caching Strategies PHP 7.0+
Patterns for when and how to store and invalidate cached data — cache-aside, write-through, write-behind, and read-through each make different trade-offs between consistency, complexity, and performance.
2mo ago
performance intermediate
Canary Deployment & Observability
Canary deployments route a small percentage of traffic to a new version — compare its golden signals against the stable version before full rollout to catch regressions automatically.
2mo ago
observability intermediate
Canvas API — 2D Drawing HTML5
The HTML Canvas API provides a 2D drawing surface via JavaScript — used for charts, image manipulation, games, data visualisations, and any pixel-level rendering that DOM elements cannot efficiently handle.
2mo ago
javascript intermediate
Capture Groups & Backreferences PHP 5.3+
Parentheses in a regex pattern create capture groups that store matched substrings for extraction or reuse — backreferences let you match the same text again later in the pattern or replacement string.
2mo ago
regex beginner
Cardinality in Metrics
Cardinality is the number of unique label value combinations — high cardinality (user_id, URL, session_id as labels) creates millions of time series and crashes Prometheus.
2mo ago
observability intermediate
Cardinality in Observability PHP 7.0+
The number of unique combinations of label values in a metric — high cardinality (millions of unique label combinations) causes memory exhaustion in time-series databases and is the most common observability scaling problem.
2mo ago
observability intermediate
Catastrophic Backtracking PHP 5.3+
A regex engine failure mode where certain patterns combined with specific inputs cause exponential backtracking, making the match take seconds or minutes — a common denial-of-service vector called ReDoS.
2mo ago
regex intermediate
Chain-of-Thought Prompting
A prompting technique that instructs an LLM to show its reasoning step-by-step before giving a final answer, significantly improving accuracy on complex tasks.
2mo ago
ai_ml beginner
Change Data Capture (CDC)
A pattern for tracking and streaming every insert, update, and delete from a database — by reading the database's internal transaction log rather than polling tables — enabling real-time event-driven integrations without impacting query performance.
2mo ago
database advanced
Clipboard API HTML5
The async Clipboard API (navigator.clipboard) is the modern replacement for document.execCommand('copy') — supports text, images, and rich content with proper permission handling.
2mo ago
javascript beginner