201506231015_ "JavaScript authoritative Guide (sixth edition)-functions as namespaces, closures," (p181-193)

1. function as a namespace. form: var Somefn = (function () {var a = 0;return function f () {//...};} ());

2. closures.

Parameters of an external function cannot be accessed directly within a closure unless the external argument is stored as a variable. For example: var outerarguments = arguments;

3. Properties, methods, constructors of functions

A.
Arguments.length; (expected number of arguments passed in)

Arguments.callee.lenth; (number of actual arguments passed in)

B. Prototype properties

Constructors inherit properties and methods from the prototype object;

C. Call () and apply ()

The first parameter is the "parent object to invoke the function"

form: function. Call (object); function. Apply (object);

4. Bind ();--binds the function to the entire object; (returns a Function object)

For example:

function Square (x) {return x*x}; var obj = {X:2}; var newObj = Square.bind (obj,obj.x);   Console.log (NEWOBJ()); 4 Note the brackets, because "square.bind (obj,obj.x);" is a function type!!

5. toString ();

6. function (); constructor

A. Pass in any number of string arguments;

B. var fn = new Function ("X", "Y", "return x + y;");  fn (2,3); 5

c. var scope = "global"; function constructfunction () {var scope = "Local"; return new function ("return scope")// None method to obtain local};

7.

201506231015_ "JavaScript authoritative Guide (sixth edition)-functions as namespaces, closures," (p181-193)