Reading some of the technical materials in Web 2.0 practice books is very casual and messy.

Read some of the practical Web 2.0 booksTechnical materialsReference is very casual and messy

VaR cannot be assigned with null values, because the compiler cannot infer the type of the VaR variable.
The as operator is similar to a forced conversion operation. However, if the conversion is not feasible, as returns NULL instead of causing an exception. More strictly speaking, this form of expression

Action two interesting additions to the 2.0 C # language are the action <> object, and anonymous methods. the action <> Object lets you specify an action to be performed med on an object and the anonymous method lets you specify a method with no body (thus... the anonymity ).
Http://www.c-sharpcorner.com/UploadFile/rmcochran/anonymousMethods04022006141542PM/anonymousMethods.aspx

YourProgramIs IIS6-web garden supported? Http://blog.joycode.com/lostinet/archive/2005/02/02/44017.aspx

 

Setupwidgets (Wi => true:
Setupwidgets (Wi => true );
This means, the following statement is always true for all widgets instances:
Widget. isfirstload = iswidgetfirstload (instance );
But you can also specify expressions that return true or false based on a specific
Condition:
Setupwidgets (Wi => wi. columnno = 1 );

$ Explanation in jquery

$ () Is a document that is used too frequently in the Dom. A convenient shorthand for the getelementbyid () method. Like this Dom method, this method returns the element of the ID passed in by the parameter.

This is better than the DOM method. You can input multiple IDS as parameters and then $ () returns an array object with all the required elements.

Http://www.cnblogs.com/kaixin110/archive/2007/09/14/892474.html

Http://www.cnblogs.com/gboxcc/archive/2009/02/09/use_jquery_from_zero.html
Http://www.cnblogs.com/zhangziqiu/archive/2009/04/30/jQuery-Learn-1.html
Http://www.cnblogs.com/anytao/archive/2009/04/30/anytao-mvc-04-actionlinktalk.html

 

=

In fact, the dollar sign "$" in the script JavaScript JS

This is the easiest and most concise explanation:

"Start with the dollar sign ($). I don't know when to start with the $ symbol in Js.CodeBut $ is not a special keyword in JS. It is actually because of a lazy person (smart programmers are very lazy) write a piece of code similar to the following:

Function $ (ID)
{
Return document. getelementbyid (ID );

}"

 

Reference from: http://www.cnblogs.com/gboxcc/archive/2009/02/09/use_jquery_from_zero.html