Reusing logic

Reusing logic

A function names a task and can receive parameters. Arrays hold ordered collections; map transforms each item without changing the original array.

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A function names a task and can receive parameters. Arrays hold ordered collections; map transforms each item without changing the original array.

Start with a minimal example, observe the result, then change one thing at a time. This helps distinguish the intended rule from accidental behavior.

Key points

Choose explicit names.
Verify the result with a simple case.