javascript-closures

Question 1

What must the return value of myFunction be if the following expression is possible?
myFunction() ();

Answer 1

The value returned by the inner function

or

It needs to return a function. (more correct answer)

Question 2

What does this code do?
     const wrap = value => () => value;

Answer 2

It passes a value from the outer function into the inner function; and the result of the code block from the inner function is assigned to the “wrap” variable.

Question 3

In JavaScript, when is a function’s scope determined; when it is called or when it is defined?

Answer 3

When it is defined

Question 4

What allows JavaScript functions to “remember” values from their surroundings?

Answer 4

Closure