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سؤال 21

Which ordinary objects are truthy in a boolean context? Select all that apply.

  1. An empty arrayپاسخ درست
  2. The empty string
  3. An empty ordinary objectپاسخ درست
  4. The value null

توضیح

Both an empty array and a separately created empty ordinary object are truthy because ordinary objects do not become falsy when they contain no elements or properties. Treating an empty container like an empty string incorrectly transfers a primitive-string rule to objects.

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شروع تمرین
سؤال 21: Which ordinary objects are truthy in a boolean context?… · JavaScript Fundamentals · Questena