Python

SQLAlchemy 2.0 — Basic Select

The modern SQLAlchemy 2.0 style: typed Mapped[] columns, the new `select()` API, and Session.scalars() for clean row access. Replaces the legacy Query syntax.

1h ago 0

SQL

BETWEEN — Range Filtering

`BETWEEN a AND b` is inclusive on both ends. Cleaner than `col >= a AND col <= b`. For dates, watch for end-of-day vs midnight boundaries.

1h ago 0

HTML

Details / Summary — Native Accordion

`<details>` is the built-in "click to expand" widget. Free keyboard navigation, search-engine-indexable content (open or closed), no JS needed. Style with CSS to match your design.

1h ago 0

Go

strconv — String ↔ Number Conversions

`strconv.Atoi` / `Itoa` for the common int<->string case; `ParseFloat`, `ParseBool`, `Quote` for everything else. Always handle the error — strings can be anything.

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PHP

Highlight Search Term in Text

Wrap every case-insensitive occurrence of a search term in <mark> tags for quick visual highlighting in search results. Properly escapes HTML so user input cannot inject markup.

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TypeScript

isWithinInterval — Date Range Check

Inclusive check that a date falls between two boundaries. Tiny but constantly useful for filtering rows by date range, validating bookings, etc.

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TypeScript

const Assertions for Literal Types

`as const` freezes a value as deeply readonly and infers the narrowest possible literal types. Replaces enums for most use cases — better tree-shaking, no runtime cost.

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PHP

Start / End of Day, Week, Month

Snap a DateTime to the start (00:00:00) or end (23:59:59) of its day, week, or month. Builds on DateTimeImmutable for value-safety.

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PHP

Soft-Delete Pattern

Mark rows as deleted instead of removing them. A small helper class keeps the WHERE deleted_at IS NULL filter out of every query you write.

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HTML

Product Page with Schema.org Markup

Marking up a product page with the Schema.org `Product` type unlocks Google's rich snippets — price, rating, availability appear directly in search results. JSON-LD is the recommended format.

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Bash

Trim Whitespace from String

Strip leading and trailing whitespace without spawning sed or awk. Uses extglob + parameter expansion — much faster in tight loops than a subshell.

1h ago 0

Bash

Trap Signals for Cleanup

Use `trap` to delete temp files / kill background workers when the script exits — even on Ctrl-C or an unhandled error. Single most-undervalued bash feature.

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PHP

Parse Link Header for Pagination

Parse the standard HTTP Link header (RFC 5988) into a relation → URL map. Lets you follow rel="next" pagination in APIs like GitHub without manually building URLs.

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PHP

Cursor-Based Pagination

Cursor (keyset) pagination is faster than OFFSET on large tables — and immune to dupes/skips when rows shift. Pass the last seen ID and direction; get the next page.

1h ago 0

PHP

Send Plain Email via mail()

A thin wrapper around PHP's mail() with proper headers (From, Reply-To, Content-Type with UTF-8). For anything serious reach for PHPMailer or Symfony Mailer — this is fine for transactional one-offs.

1h ago 0

Go

strings.Builder — Efficient Concatenation

Building strings with `+` allocates O(n²) memory. `strings.Builder` writes to an internal buffer with a single final allocation — orders of magnitude faster in loops.

1h ago 0

Java

Jackson — Annotations (rename, ignore, etc)

Field-level annotations let you map between snake_case JSON and camelCase Java, skip nulls, never serialize secrets, set defaults on missing fields.

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Java

Singleton via enum

`enum` with a single value is the simplest correct singleton implementation: lazy, thread-safe, serialization-safe, reflection-safe. Joshua Bloch's recommendation in Effective Java.

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HTML

Time Element with datetime Attribute

`<time datetime="...">` lets you display a human-friendly date while giving machines an ISO-8601 timestamp. Used by browsers, Schema.org parsers, and screen readers.

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PHP

Format Duration in Seconds

Render a number of seconds as a human-friendly duration like "1h 23m 45s" — automatically trimming leading zero units. Handy for elapsed-time displays in dashboards.

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TypeScript

Date Range Generator

Yield each day (or step) between two dates as a Date object. Generator-based so consumers can `break` early without computing the whole range.

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Bash

Wait For Service With Timeout

Block until a TCP port accepts connections, with a deadline. Used everywhere in docker-compose entrypoints — wait for the DB to be ready before running the app.

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HTML

Open Graph + Twitter Card Tags

How your page renders when shared to Facebook, LinkedIn, Slack, Discord, X. Every public page needs these — they dramatically improve click-through on shares.

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PHP

Measure Code Block Execution Time

Time a closure with microsecond precision and return both its result and the elapsed milliseconds. Great for quick perf experiments without pulling in a profiler.

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Rust

mpsc Channel Between Threads

`std::sync::mpsc` is the standard cross-thread channel. Multiple producers, single consumer. Send any `Send` type; the receiver blocks on `recv()` until something arrives.

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Kotlin

Room — Android Database

Room is the official Android persistence library — annotation-driven, compile-time SQL verification, coroutine + Flow integration out of the box.

1h ago 0

Rust

tokio::spawn — Independent Tasks

`spawn` runs a future on the runtime as an independent task — fire-and-forget, or `.await` the returned `JoinHandle` to get its result. Equivalent to threads but multiplexed onto the worker pool.

1h ago 0

Kotlin

Enums with Properties and Methods

Kotlin enums can carry constructor properties and define methods — including abstract methods overridden per constant. Way more expressive than Java enums.

2h ago 0

Kotlin

groupBy and partition

`groupBy` returns a `Map<Key, List<T>>` keyed by what the lambda returns. `partition` is a special-case `groupBy` for booleans — returns `(matching, nonMatching)` Pair.

2h ago 0

Kotlin

Sequences — Lazy Collections

A `List` materializes every intermediate `map`/`filter` result. A `Sequence` processes ONE element through the whole pipeline at a time — better for big inputs or short-circuiting (`first`, `take`).

2h ago 0