السؤال 58

A forEach callback returns x * 2 for every element. What does the forEach call itself return?

a new array of doubled values
the original array
the final callback result
undefinedالإجابة الصحيحة

الشرح

forEach invokes the callback but does not collect its returned values, so the method call returns undefined. Expecting a doubled array confuses forEach with map, which is designed to gather callback results.

الشرح

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