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

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PythonCollections

Merge two dictionaries

Combine two dictionaries into a new dictionary. When a key appears in both inputs, the value from the second dictionary wins.

dictionary✓ Tested
CArray transformations

Merge two sorted arrays

C: Advance the pointer belonging to the smaller next element and copy any remaining suffix.

C✓ Tested
Docker / ComposeCompose service options

Mount a local input directory with long syntax

Docker / Compose: Long mount syntax makes the bind type and read-only intent explicit.

Docker / Compose✓ Tested
ReactPerformance & rendering

Mount expensive content only when requested

Mount expensive content only when requested with a small React component and explicit browser behavior.

React✓ Tested
CSSPositioning & stacking

Move a box visually without changing its layout slot

CSS: Transforms change the painted geometry while leaving surrounding normal-flow layout unchanged.

CSS✓ Tested
HTMLAccessible structure

Move focus to a heading without adding a tab stop

HTML: A negative tabindex permits programmatic focus while keeping the heading out of ordinary sequential tab navigation.

HTML✓ Tested
HTMLImages & embedded documents

Name a meaningful image with alternative text

HTML: Alt supplies an accessible text alternative describing the image’s purpose.

HTML✓ Tested
HTMLImages & embedded documents

Name a self-contained embedded document

HTML: Give an iframe a descriptive title and provide its small document with srcdoc.

HTML✓ Tested
HTMLAccessible structure

Name complementary content

HTML: Aside identifies supporting content related to the main document.

HTML✓ Tested
C#Types & reliable control flow

Narrow an object using a type pattern

C#: A successful is pattern introduces a strongly typed local variable.

C#✓ Tested
ReactGetting Started

Nest a reusable component

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

React✓ Tested
ReactComponents & props

Notify a parent with a callback prop

Notify a parent with a callback prop with a small React component and explicit browser behavior.

React✓ Tested