Results for “persistent data”
Small, practical examples. Search by task or narrow things down below.
Find values missing from another collection
C#: Except removes duplicates as it calculates the set difference.
C#✓ Tested
Format an integer as padded hexadecimal
Format an integer as padded hexadecimal in a complete Rust program using the standard library.
Rust✓ Tested
Generate every combination of two sets
SQL: CROSS JOIN creates one result per possible pair, so the output size is the product of the input sizes.
SQL✓ Tested
Generate every combination of two sets
SQL Server: CROSS JOIN creates one result per possible pair, so the output size is the product of the input sizes.
SQL Server✓ Tested
Generate every combination of two sets
Postgres: CROSS JOIN creates one result per possible pair, so the output size is the product of the input sizes.
Postgres✓ Tested
Generate every combination of two sets
SQLite: CROSS JOIN creates one result per possible pair, so the output size is the product of the input sizes.
SQLite✓ Tested
Give a document a descriptive browser title
HTML: The title element supplies the browser document title independently of the visible heading.
HTML✓ Tested
Handle malformed JSON input
Python: Catch JSONDecodeError without hiding unrelated programming errors.
Python✓ Tested
Implement a method on a struct
Implement a method on a struct in a complete Rust program using the standard library.
Rust✓ Tested
Include zero counts for missing relationships
SQL: Count the non-null child key after a left join so a missing relationship produces zero.
SQL✓ Tested
Include zero counts for missing relationships
SQL Server: Count the non-null child key after a left join so a missing relationship produces zero.
SQL Server✓ Tested
Include zero counts for missing relationships
Postgres: Count the non-null child key after a left join so a missing relationship produces zero.
Postgres✓ Tested