Results for “read rows”
Small, practical examples. Search by task or narrow things down below.
Copy a file without replacing an existing destination
C++: The default copy_file policy refuses to overwrite an existing destination.
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
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
Count an ordered list downward
HTML: The reversed attribute changes the native numbering direction.
HTML✓ Tested
Count day boundaries between dates
Compare date values with DATEDIFF.
DATEDIFF✓ Tested
Count distinct values within a result
SQL: COUNT DISTINCT counts distinct non-null values.
SQL✓ Tested
Count distinct values within a result
SQL Server: COUNT DISTINCT counts distinct non-null values.
SQL Server✓ Tested
Count distinct values within a result
Postgres: COUNT DISTINCT counts distinct non-null values.
Postgres✓ Tested
Count distinct values within a result
SQLite: COUNT DISTINCT counts distinct non-null values.
SQLite✓ Tested
Count elements satisfying a predicate
C++: count_if counts matches without constructing a filtered collection.
C++✓ Tested