Results for “open”
Small, practical examples. Search by task or narrow things down below.
Understand setup() and loop()
Arduino / C: See initialization run once and the main loop run repeatedly.
Arduino / C✓ 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 an optional fallback
Use Optional.orElse to provide a default for a missing Java value.
Java✓ Tested
Use headings to show document structure
HTML: Learn how to use headings to show document structure in a complete browser example.
HTML✓ Tested
Use named states for a controller
Arduino / C: An enum makes state transitions easier to read than unexplained numbers.
Arduino / C✓ Tested
Use semantic page landmarks
HTML: Learn how to use semantic page landmarks in a complete browser example.
HTML✓ 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
Validate a structured text identifier
HTML: The pattern attribute matches the entire nonempty input; required handles the empty case.
HTML✓ Tested
Validate an email input
Use browser constraint validation for a required HTML email field.
HTML✓ Tested
Validate the shape of an absolute URL
HTML: A URL input checks syntax, not whether a resource exists or is safe.
HTML✓ 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