JavaScript - function as an object property -

All of you, this is John Racing's # 23 from Advanced Javascript, which

< Code> What will happen if there is a function object property

1) About the terminology, the variable is the cutting object, right? If the anonymous function is its property, then what is called "use"? I thought "usage" is also called property? Or "object" is also an object because there is a value in it, namely a function?

2). What is the purpose of changing the function SHRP: True SHRP: is wrong? What does this!

3) When it claims! Katiana.Sister, what is this really saying? Is that SHRP now set to "false"?

  var katana = {isharp: true, use: function () {this.isSharp =! This.isSharp; }}; Katana.use (); Life! (Katana. ISHRPP, "Confirm the value of SSRP has changed.");    
 
 
 
 
 Yes,  katana  Created by using an object ( {...}  notation). "Usage" is the name of the asset's property whose  value  will be an anonymous function (which is also an object).   
 
 The function  isSharp  (from  true  to  incorrect  or  false  to  true ).   
 
 It is saying that  isharp  is something that does not evaluate the truth (this is almost  undefined , < Code> null ,  false ,  0 , etc.). In this situation, since  isharp  is always a  true  or  false , then it is emphasizing that it is  false  Is.    
 The main point of the sample (and the cool part) is this line:  
  katana.use ();   
 This is the first time the value of the "use" property from the  katana  object (it is  katana. It's  part). The value is already an anonymous function, then that function is executed (it is  ()  part). In fact, the good part is that it is executed by   katana  object  - which means  this  is the reference to the anonymous function  Kutana  object when it is called like this.