Results for “is”
Small, practical examples. Search by task or narrow things down below.
Return zero for a sum over no rows
SQL: SUM produces NULL for an empty input; COALESCE supplies the desired reporting default.
SQL✓ Tested
Return zero for a sum over no rows
SQL Server: SUM produces NULL for an empty input; COALESCE supplies the desired reporting default.
SQL Server✓ Tested
Return zero for a sum over no rows
Postgres: SUM produces NULL for an empty input; COALESCE supplies the desired reporting default.
Postgres✓ Tested
Return zero for a sum over no rows
SQLite: SUM produces NULL for an empty input; COALESCE supplies the desired reporting default.
SQLite✓ Tested
Reuse a CSS custom property
CSS: Learn how to reuse a CSS custom property in a complete browser example.
CSS✓ Tested
Reuse an LED action with a function
Arduino / C: Put a short LED sequence in a named function and call it twice.
Arduino / C✓ Tested
Reuse colors with custom properties
Define a CSS custom property and use it for text color.
CSS✓ Tested
Reuse controlled-input bindings
Reuse controlled-input bindings with a small React component and explicit browser behavior.
React✓ Tested
Reuse document-title synchronization
Reuse document-title synchronization with a small React component and explicit browser behavior.
React✓ Tested
Reuse event subscription cleanup
Reuse event subscription cleanup with a small React component and explicit browser behavior.
React✓ Tested
Reverse a copy while preserving the original
JavaScript: Copy before reverse because reverse mutates the array it receives.
JavaScript✓ Tested
Roll back a trial update
Group a change in a transaction and undo it.
transaction✓ Tested