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Small, practical examples. Search by task or narrow things down below.

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Docker / ComposeGetting Started

Give a read-only container temporary storage

Docker / Compose: Give a read-only container temporary storage using a locally available Ubuntu image.

Docker / Compose✓ Tested
Docker / ComposeCompose service options

Give a read-only service writable scratch space

Docker / Compose: A tmpfs mount provides temporary storage independent of the root filesystem.

Docker / Compose✓ Tested
SQLGetting Started

Give a result column a readable name

SQL: Use AS to label a computed result column.

SQL✓ Tested
SQL ServerGetting Started

Give a result column a readable name

SQL Server: Use AS to label a computed result column.

SQL Server✓ Tested
PostgresGetting Started

Give a result column a readable name

Postgres: Use AS to label a computed result column.

Postgres✓ Tested
SQLiteGetting Started

Give a result column a readable name

SQLite: Use AS to label a computed result column.

SQLite✓ Tested
HTMLAccessible structure

Give a section an accessible region name

HTML: A section becomes a named landmark when its heading is referenced with aria-labelledby.

HTML✓ Tested
CSSGetting Started

Give an element a background

CSS: Learn how to give an element a background in a complete browser example.

CSS✓ Tested
CSSFlexbox alignment

Give an item the remaining horizontal space

CSS: A growing flex item absorbs free space after fixed items have been sized.

CSS✓ Tested
Arduino / CGetting Started

Give an LED pin a constant name

Arduino / C: Use const to name the built-in LED pin and reuse it in output instructions.

Arduino / C✓ Tested
CSSGrid placement

Give implicit grid rows a minimum height

CSS: Minmax allows an implicit row to grow when its content requires more room.

CSS✓ Tested
SQLReporting & grouped calculations

Group by more than one field

SQL: Each distinct combination of grouping fields produces its own row.

SQL✓ Tested