The snippet library.
Small, practical examples. Search by task or narrow things down below.
Loop over an array safely
Preserve spaces in array elements while iterating.
array✓ Tested
Loop over an inclusive range
Loop over an inclusive range in a complete Rust program using the standard library.
Rust✓ Tested
Maintain a rolling sum in a circular window
Arduino / C: Subtract the overwritten sample before adding the next one.
Arduino / C✓ Tested
Make a Compose service’s filesystem read-only
Docker / Compose: Make a Compose service’s filesystem read-only in a small Compose file.
Docker / Compose✓ Tested
Make a pair of columns unique together
SQL: A composite primary key permits repeated individual values while forbidding a duplicate combination.
SQL✓ Tested
Make a pair of columns unique together
SQL Server: A composite primary key permits repeated individual values while forbidding a duplicate combination.
SQL Server✓ Tested
Make a pair of columns unique together
Postgres: A composite primary key permits repeated individual values while forbidding a duplicate combination.
Postgres✓ Tested
Make a pair of columns unique together
SQLite: A composite primary key permits repeated individual values while forbidding a duplicate combination.
SQLite✓ Tested
Make a script executable by its owner
Linux Commands: Add the owner execute bit without replacing all permission bits.
Linux Commands✓ Tested
Make a second copy of a practice file
Linux Commands: Make a second copy of a practice file using GNU/Linux commands in an empty practice directory.
Linux Commands✓ Tested
Make an inline element a block
CSS: Learn how to make an inline element a block in a complete browser example.
CSS✓ Tested
Make an unavailable select option unselectable
HTML: A disabled option remains visible but cannot be selected through normal keyboard navigation.
HTML✓ Tested