javascript-closures

Question 1

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

Answer 1

the return value of the function inside of myFunction

Question 2

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

Answer 2

the wrap is being assigned to an anonymous function taking one parameter value which returns another anonymous function with no parameters that returns value

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

closures