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Question 23

If value is the empty string, what is the result of !!value?

  1. falseBonne réponse
  2. true
  3. the empty string
  4. undefined

Explication

The first negation converts the empty string to boolean and reverses its falsy value; the second reverses that boolean again. The final result is the boolean false, not the original string.

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Question 23: If value is the empty string, what is the result of !!value? · JavaScript Fundamentals · Questena