Intermediate terms
Taxonomy Design
1
The discipline of organizing concepts into a structured hierarchy of categories so knowledge can be classified, navigated, and retrieved consistently.
3mo ago
Knowledge Engineering intermediate
Type Narrowing
Python 3.10+
Static type checkers refine a variable's type within a branch based on runtime checks like isinstance, None comparisons, and literal guards.
3mo ago
Python intermediate
Text Resize and Reflow
CSS3 Ensuring content reflows into a single column and stays usable when users scale text up to 200% or zoom to 400% without horizontal scrolling.
4mo ago
Accessibility intermediate
Test Parallelization Gotchas
Hidden runtime hazards when tests execute concurrently — shared state, race conditions, and resource contention turn green suites red intermittently.
4mo ago
Testing intermediate
Type Guards & Narrowing
2.0 Type guards are expressions that narrow a union type to a more specific type at runtime — telling TypeScript exactly which branch of a union you're in.
6mo ago
TypeScript intermediate
Test Doubles
PHP 8.0+
1
Substitute objects used in tests to replace real dependencies — mocks, stubs, spies, fakes, and dummies each serve a different purpose.
6mo ago
Testing intermediate
Trie (Prefix Tree)
A tree where each node represents a character — paths from root to leaf spell out keys, enabling O(m) lookup, prefix search, and autocomplete where m is key length, independent of dataset size.
6mo ago
Data Structures intermediate
TLS Certificate Lifecycle
The end-to-end process of generating, validating, issuing, deploying, monitoring, and renewing a TLS certificate — and what breaks at each stage when it goes wrong.
6mo ago
Cryptography intermediate
Topological Sort
PHP 7.4+ An ordering of nodes in a directed acyclic graph (DAG) such that for every directed edge u→v, node u appears before v in the ordering.
6mo ago
Algorithms intermediate
Type Inference
PHP 7.0+
4
The compiler's ability to automatically deduce the type of an expression without an explicit annotation, based on context and assigned values.
6mo ago
Compiler intermediate
Test-Driven Development (TDD)
PHP 7.0+
2
A development practice where tests are written before the code they test — Red (write a failing test), Green (write the minimum code to pass), Refactor (improve without breaking tests).
6mo ago
Testing intermediate
TF-IDF
1
Term Frequency–Inverse Document Frequency — a relevance scoring formula that ranks documents higher when a query term appears frequently in them but rarely across the whole collection.
6mo ago
Search intermediate
Thread Safety
PHP 7.0+
Thread-safe code produces correct results regardless of how multiple threads interleave — achieved through immutability, atomic operations, or synchronisation primitives.
6mo ago
Concurrency intermediate
Thundering Herd Problem
Thundering herd: many processes simultaneously wake up to handle one event — all compete, one wins, the rest wasted work. Common after cache expiry or server restart.
6mo ago
Concurrency intermediate
Tokenization in LLMs
3
The process of splitting text into tokens — subword units that LLMs process — which directly determines context window usage, cost, and model behaviour on non-English and code inputs.
6mo ago
AI / ML intermediate
Top-Level Await in Modules
ES2022
ES2022 top-level await lets you use await at the module root without wrapping in async function — blocking module evaluation until the awaited Promise resolves.
6mo ago
JavaScript intermediate
Topics & Partitions
1
Kafka topics are divided into partitions — the unit of parallelism and ordering. More partitions = more parallelism; partition key determines which partition a record lands in.
6mo ago
Messaging intermediate
Trace Sampling Strategies
Sampling records only a fraction of traces to control cost — head-based sampling decides at start, tail-based decides at end (after seeing the full trace), enabling smart error/latency capture.
6mo ago
Observability intermediate
Traces & Spans
PHP 7.0+
The building blocks of distributed tracing — a trace represents a complete request journey across services, composed of spans that each record one operation with its start time, duration, and parent–child relationship.
6mo ago
Observability intermediate
Traits — Horizontal Reuse (PHP 5.4)
PHP 5.4+
PHP 5.4 traits enable horizontal code reuse — mixins for PHP classes that can't use multiple inheritance. Use sparingly; prefer composition over trait overuse.
6mo ago
PHP intermediate