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Small, practical examples. Search by task or narrow things down below.
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Use a fallback for a missing hashtable entry
PowerShell: Test the key explicitly so legitimate false or zero values are preserved.
PowerShell✓ Tested
Use a function’s exit status as a boolean result
Bash Scripts: Return zero for success and test the function directly in a conditional.
Bash Scripts✓ Tested
Use a wider type for a large count
Arduino / C: Use a wider type for a large count on an Uno with the Serial Monitor set to 9600 baud.
Arduino / C✓ Tested
Use named states for a controller
Arduino / C: An enum makes state transitions easier to read than unexplained numbers.
Arduino / C✓ Tested
Validate a complete numeric serial command
Arduino / C: Check for digits, an end pointer, and an application-specific range.
Arduino / C✓ Tested
Validate a small stored payload with a checksum
Arduino / C: Store a checksum with the payload and reject a changed byte.
Arduino / C✓ Tested
Visit every reading in a fixed array
Arduino / C: Visit every reading in a fixed array on an Uno with the Serial Monitor set to 9600 baud.
Arduino / C✓ Tested
Write and read a setting in EEPROM
Persist one byte using the update operation.
EEPROM✓ Tested