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Small, practical examples. Search by task or narrow things down below.

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ReactPerformance & rendering

Memoize a component with stable props

Memoize a component with stable props with a small React component and explicit browser behavior.

React✓ Tested
ReactGetting Started

Nest a reusable component

Nest a reusable component with a small React component and explicit browser behavior.

React✓ Tested
JavaFile operations & binary data

Normalize relative path components

Java: Path.normalize removes redundant dot components without accessing the filesystem.

Java✓ Tested
HTMLMetadata & document links

Offer a downloadable text file

HTML: The download attribute supplies a filename for this same-document data URL.

HTML✓ Tested
HTMLForms

Offer a selection list

Provide a labeled HTML select with a default option.

HTML✓ Tested
HTMLText semantics

Offer an optional break inside a long label

HTML: Wbr supplies a potential line-break opportunity without inserting a visible hyphen.

HTML✓ Tested
CSSFlexbox alignment

Override cross-axis alignment for one item

CSS: Align-self changes one item without changing its siblings’ alignment.

CSS✓ Tested
C++Ownership & optional values

Own one dynamically allocated value with unique_ptr

C++: make_unique allocates a value whose lifetime is tied to its owning smart pointer.

C++✓ Tested
Arduino / CBinary values & packets

Pack two small values into one byte

Arduino / C: Mask each four-bit value before combining it.

Arduino / C✓ Tested
C#Dates & precise numbers

Parse a date without a time component

C#: DateOnly avoids attaching an irrelevant time or timezone to a calendar date.

C#✓ Tested
Linux CommandsDates & process utilities

Pass a variable to one command

Linux Commands: Use env to supply a child process value without setting it permanently in the parent shell.

Linux Commands✓ Tested
JavaScriptRegular expressions & URL encoding

Percent-encode one URL component

JavaScript: encodeURIComponent escapes a parameter value rather than a complete URL.

JavaScript✓ Tested