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

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TypeScriptPromises & iteration protocols

Consume an asynchronous sequence

TypeScript: for await waits for each value of an async iterator in sequence.

TypeScript✓ Tested
Bash ScriptsVariables & text

Convert a string to lowercase

Normalize a text value using Bash expansion.

lowercase✓ Tested
Bash ScriptsParameter expansion

Convert a variable to uppercase

Bash Scripts: Double caret transforms matching lowercase characters in Bash 4 or later.

Bash Scripts✓ Tested
PowerShellHashtables & object records

Convert an object’s properties into a hashtable

PowerShell: Enumerate PSObject.Properties when the set of property names is known only at runtime.

PowerShell✓ Tested
C++Text validation & parsing

Convert ASCII text to lowercase safely

C++: Cast each byte to unsigned char before using the cctype function.

C++✓ Tested
CBinary formats & structured parsing

Convert ASCII text to lowercase safely

C: Cast to unsigned char before calling ctype functions on a possibly signed char.

C✓ Tested
CStrings

Convert ASCII text to uppercase

Convert characters with toupper while avoiding signed-char undefined behavior.

C✓ Tested
JavaScriptNumbers & numeric validation

Convert between integer bases

JavaScript: Supply a radix when parsing a nondecimal integer string.

JavaScript✓ Tested
TypeScriptNumbers & numeric validation

Convert between integer bases

TypeScript: Supply a radix when parsing a nondecimal integer string.

TypeScript✓ Tested
C#JSON & binary formats

Convert bytes to Base64 and back

C#: Encode text to UTF-8 before converting it to a Base64 representation.

C#✓ Tested
Arduino / CSerial protocols

Convert received ASCII letters to uppercase

Arduino / C: ctype functions should receive an unsigned character value.

Arduino / C✓ Tested
Arduino / CEEPROM & program memory

Copy a flash string into a bounded RAM buffer

Arduino / C: strncpy_P reads from program memory into ordinary RAM.

Arduino / C✓ Tested