What this snippet does
Factory functions centralize object creation logic — callers just specify what they want, not how it's built.
Expected output
Rex says woof Whiskers says meow Unknown animal: fish
Why practise typing this
Typing design patterns code builds muscle memory for the symbols and indentation JavaScript uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.
More JavaScript practice
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