JavaScript - function as an object property

Question

Hey everyone, this is #23 from John Resig Advanced JavaScript http://ejohn.org/apps/learn/#23, called

What happens if a function is an object pr

Answer 1

1) Katana is an object. Katana.use is a function. Its a property that contains a function as value. The value it contains happens to be an anonymous function.

The distinction is that Katana.use is a property of Katana and that the value of Katana.use is a function. use is a key defined on Katana since Katana["use"] also works.

2) It's setting isSharp to NOT isSharp so either true -> false or false -> true

3) the assert is saying katana.isSharp === false which it should be since it was orginally true but then set to false.