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Daniel Kay (7) [Avatar] Offline
on page 254 the listing 9.9 tests Array.prototype.find returns undefined if nothing was found. Later on the same page I find the incorrect statement, that null is returned if nothing was found.

Best regards,
Daniel Kay
Josip Maras (30) [Avatar] Offline
Yes, that's a mistake, it should be undefined.

Thank you, we'll fix it.