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Question 21

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

  1. An empty arrayBonne réponse
  2. The empty string
  3. An empty ordinary objectBonne réponse
  4. The value null

Explication

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