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

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ReactGetting Started

Render nothing from an optional component

Render nothing from an optional component with a small React component and explicit browser behavior.

React✓ Tested
ReactAccessibility & events

Render untrusted-looking input as literal text

Render untrusted-looking input as literal text with a small React component and explicit browser behavior.

React✓ Tested
ReactGetting Started

Render your first React component

Render your first React component with a small React component and explicit browser behavior.

React✓ Tested
Linux CommandsTransforming text

Reorder fields with a capture group

Linux Commands: Use extended regular expressions and backreferences to rearrange a known format.

Linux Commands✓ Tested
RustStrings & Unicode

Replace a literal substring

Replace a literal substring in a complete Rust program using the standard library.

Rust✓ Tested
PowerShellGetting Started

Replace a literal word in text

PowerShell: Replace a literal word in text using PowerShell 7.

PowerShell✓ Tested
Arduino / CText & bounded buffers

Replace a token inside an Arduino String

Arduino / C: replace modifies all occurrences in the existing object.

Arduino / C✓ Tested
JavaScriptArray restructuring

Replace an array segment in place

JavaScript: splice returns removed items and inserts replacements at the chosen position.

JavaScript✓ Tested
TypeScriptArray restructuring

Replace an array segment in place

TypeScript: splice returns removed items and inserts replacements at the chosen position.

TypeScript✓ Tested
jQueryInsertion & wrapping

Replace an element while preserving its position

jQuery: replaceWith swaps an entire node.

jQuery✓ Tested
Bash ScriptsVariables & text

Replace every occurrence in a string

Substitute text directly with Bash parameter expansion.

replace✓ Tested
JavaStrings

Replace literal text

Replace all literal matches in a Java string without regular expressions.

Java✓ Tested