Results for “open”
Small, practical examples. Search by task or narrow things down below.
Continue an ordered list at a chosen number
HTML: The start attribute controls the initial ordinal without changing item text.
HTML✓ Tested
Control an LED from a button
Translate an active-low button input into an LED output.
button✓ Tested
Convert a supplied ADC count to volts
Arduino / C: Scale a ten-bit ADC count using an explicit reference voltage.
Arduino / C✓ Tested
Convert Celsius to Fahrenheit
Arduino / C: Use floating-point constants to avoid integer division.
Arduino / C✓ Tested
Convert received ASCII letters to uppercase
Arduino / C: ctype functions should receive an unsigned character value.
Arduino / C✓ Tested
Copy a flash string into a bounded RAM buffer
Arduino / C: strncpy_P reads from program memory into ordinary RAM.
Arduino / C✓ Tested
Copy a multibyte interrupt-owned counter atomically
Arduino / C: ATOMIC_RESTORESTATE restores the interrupt state after reading a shared value.
Arduino / C✓ Tested
Copy a range without changing the source
JavaScript: Array.slice returns a shallow copy of the selected half-open range.
JavaScript✓ Tested
Copy a range without changing the source
TypeScript: Array.slice returns a shallow copy of the selected half-open range.
TypeScript✓ Tested
Copy a string with a guaranteed terminator
Arduino / C: Reserve one character for the terminator when copying a bounded string.
Arduino / C✓ Tested
Count a button’s falling edge in the main loop
Arduino / C: Compare each reading with the previous state to detect transitions.
Arduino / C✓ Tested
Count a falling edge with an interrupt
Increment a counter when an external input changes.
attachInterrupt✓ Tested