Results for “C++”
Small, practical examples. Search by task or narrow things down below.
Treat an empty trimmed value as missing
SQLite: NULLIF converts an empty string to NULL before a fallback is applied.
SQLite✓ Tested
Try parsing an integer
Use TryParse to avoid exceptions for invalid C# integer input.
C#✓ Tested
Underline meaningful text
CSS: Learn how to underline meaningful text in a complete browser example.
CSS✓ Tested
Understand setup() and loop()
Arduino / C: See initialization run once and the main loop run repeatedly.
Arduino / C✓ Tested
Undo only the work after a savepoint
SQL: After committing the fixtures, roll back a trial change while keeping earlier work in the second transaction.
SQL✓ Tested
Undo only the work after a savepoint
SQL Server: After committing the fixtures, roll back a trial change while keeping earlier work in the second transaction.
SQL Server✓ Tested
Undo only the work after a savepoint
Postgres: After committing the fixtures, roll back a trial change while keeping earlier work in the second transaction.
Postgres✓ Tested
Undo only the work after a savepoint
SQLite: After committing the fixtures, roll back a trial change while keeping earlier work in the second transaction.
SQLite✓ Tested
Unstage a file without losing edits
Return a staged change to the working tree.
restore✓ Tested
Update one array item by its identifier
Update one array item by its identifier with a small React component and explicit browser behavior.
React✓ Tested
Update state from its previous value
Update state from its previous value with a small React component and explicit browser behavior.
React✓ Tested
Use a deque as a FIFO queue
Java: Add at the tail and remove at the head using ArrayDeque.
Java✓ Tested