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ANSWERS.md

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Your responses to the short answer questions should be laid out here using Mark Down.

  1. Describe the biggest difference between .forEach & .map. A: The biggest difference is .map returns a new array that is a copy of the original but has been transformed by the callback. .forEach just executes the callback on each array element but will always return undefined.
  2. What is the difference between a function and a method? A: A method is just a function within an object.
  3. What is closure? A: Closure is a bit nebulous, but basically it is closely related to scope. The closure is the lexical environment that a function was called in.
  4. Describe the four rules of the 'this' keyword. A: Window - the most global scope is the window object. Implicit - When called, look to the left of the . to determine what 'this' refers to. Explicit - When 'this' is explicity assigned using .call, .bind or .apply. New - When using a constructer function invoked with the new keyword, this is bound to the new object that was created.
  5. Why do we need super() in an extended class? A: super() is needed to pass any new attributes up to the constructor of the parent object.