Terms starting with "T"
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.
2d ago
Python intermediate
Translatable Domain Model
PHP 8.0+
A domain model designed from the start to carry per-locale content as first-class entity data, not as a translation layer bolted on later.
2w ago
i18n advanced
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.
2w 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.
1mo ago
Testing intermediate
Technical Writing for Developers
The craft of writing documentation, READMEs, design docs, RFCs, and comments clearly enough that another engineer can act on them without asking you — a force multiplier that most developers undertrain.
2mo ago
General beginner
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.
2mo ago
TypeScript intermediate
Timing Attacks
4
Side-channel attacks that infer secret values by measuring how long an operation takes — a string comparison that short-circuits on the first mismatch leaks information about the secret one character at a time.
CWE-208
3mo ago
Security advanced
Test Doubles
PHP 8.0+
2
Substitute objects used in tests to replace real dependencies — mocks, stubs, spies, fakes, and dummies each serve a different purpose.
3mo 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.
3mo 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.
3mo 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.
3mo 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.
3mo ago
Compiler intermediate
Temperature & Sampling in LLMs
Temperature controls how random an LLM's output is — low values (0–0.3) produce predictable, conservative responses; high values (0.7–1.0) produce creative but less reliable outputs.
3mo ago
AI / ML beginner
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).
3mo ago
Testing intermediate
TF-IDF
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.
3mo 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.
3mo 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.
3mo 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.
3mo 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.
3mo 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.
3mo ago
Messaging intermediate