Python is a process control that relies on tab tabs and line breaks.Programming LanguageSo you must note that its white space characters areCode.
I. Condition Selection statement
1. If statement
Code
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> If X Y: Print " X " Elif X = Y: Print " X = y " Else : Print " X> Y " Elif is short for else if. Each judgme
1. Keep the position of the scroll bar after callback
In ASP. net1.1, it is very painful to keep the position of the scroll bar after callback, especially when there is a grid in the page and you want to edit a Specific Row. The page is reloaded and must be rolled down at the top of the page to keep the page unchanged. In asp2.0, you only need to simply add the maintainscrollpostiononpostback attribute to the page attribute:
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What we want to talk about today is that the client accesses WebService-serialization and deserialization.
I heard serialization in ASP. NET AJAX for the first time.
====================================== Demo1 ==================== ==========
Demo1 demonstrates using JSON characters on the client.
Add reference first
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1: Brief Introduction
MongoDB is a distributed document database that supports a master-slave structure similar to a relational database. It stores documents in binary Json format, without locks, transactions, and indexes.
2: Installation Steps
Step 1: Download the Assembly http://www.mongodb.org/downloads
Part 2: extract and extract the relevant bin directory to C: \ Mongo (this option is optional), and create a db folder under this directory.
Part 3: Open the CMD window, go to the C: \ Mongo \
1. Introduction to anonymous methodsThe anonymous method allows us to write the method in an "inline" way.CodeThe code is directly associated with the delegated instance, which makes the task of delegated instantiation more intuitive and convenient.
2. Questions about the anonymous method:
2.1 parameter listThe anonymous method can be followed by a parameter list (you can leave it unspecified) by the delegate keyword. The following code blocks can access these parameters:Addbutton. Click + =
the possibility of conflict.
Add a custom request suffix to fix the httphanlder bug in. JS/. CSS that Asp.net cannot capture in some IIS sites.
Modified some of the original bugs, such as monitoring file changes.
Function demonstration
1. differentiate multiple languages for automatic loading of relevant JS and JS variable resources First look at the entire file organizationThere are several logical judgment points. 1. When webform1.aspx is requested, it will automatically deter
Action and filter
In Asp.net MVC, filter can only be restricted to action and controller. It inherits from actionfilterattribute and can overwrite the following important methods.1: void onactionexecuting (actionexecutingcontext): action before execution
2: void onactionexecuted (actionexecutedcontext): The operation after the action is executed.
3: void onresultexecuting (resultexecutingcontext): executed before parsing actionresult
4: void onresultexecuted (resultexecutedcontext): Afte
the plug-in and use this interface standard to manage all the later plug-ins. Here, the main program and plug-ins are implemented through a standard DLL export function, mainly used to create plug-in objects in the main program:
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Bool plug_createobject (void ** pobj)
{
* Pobj = new cpluga;
Return * pobj! = NULL;
}
The class cpluga is derived from the base
CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> Class Song@ Plays = 0 Def Initialize (name, artist, duration)@ Name = Name@ Artist = Artist@ Duration = Duration@ Plays = 0End Def Play@ Plays + = 1 # Same as @ plays = @ plays + 1 @ Plays + = 1 " This song: # @ plays. Total # @ plays. " EndEnd
For debugging purposes, I specifically return a string containing the number of times the song was played and
CodeBlock and iterator
This section briefly introduces one of Ruby's features. What we will learn is code blocks: Some codes that can be associated with methods to call them together, just like the parameters of methods.
This is an incredible powerful feature. One of our critics commented on this feature as follows: "This is really interesting and important. If you haven't noticed it before,
Now you have to pay attention to it ." We all agree with him.
You can use code blocks to implemen
I just read the article about oracle efficient design. When it comes to Standard Quantum queries in oracle, the performance depends on associated queries, however, I know in SQL server that the performance of associated queries is better than that of scalar queries.
Let's test the performance by executing the statement:
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Set autotrace on
Select a. username
Yield's English words mean production. I was very confused when I first came into contact with Python and never understood how yield was used. Just roughly knowing that yield can be used to insert data into a function's return value, for example, the following example:
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Def
Addlist (alist ):
For
I
In
Alist:
Yield
I
+
1Take out each item of alist and
Press:This article is a summary of some things discussed last week with the Assembly head. I tried to use more code to explain the covariant and reverse variant more easily. You can also refer to Ninputer's article:
Http://www.cnblogs.com/Ninputer/archive/2008/11/22/generic_covariant.html
Why are there changes?
First, explain why the change is required. Covariant is actually a simple concept. We know that in the OO language, we can assign a subclass instance to a base class reference. Like this
Null Glossary:NULL in programming indicates unavailable data, which is meaningless.
1. invalid; valueless
2. Zero number
Null indicates Unknown data in the database, which has three meanings:1) know that the data exists, but do not know the specific value2) do not know whether the data exists3) data does not exist
For the description of NULL in the database, refer to this article: some small points that are easily overlooked in SQL development (1)
"Null"This object has different meanings in diff
I am already crazy... I have been writing this article twice, so I cherish it
This section describes Helper in Asp. netMVC.Helper is actually a method group written in View to implement some flexible functions.
In fact, the View of Asp.net MVC is An Aspx page, and the definition method can be declared. Why is there a Helper?In fact, it is nothing more than separating the interface and logic, and Asp.net MVC does not only support Aspx View. In the extension package, there are also Castle's NVelo
This article will be manually called on SQL Server
Program Set.
1. Use vs to create a class library named cstestnamespace and create a class cstestclass. Change cstestclass to the followingCodeMainly returns a string of content from SQL. Compile the program and rename the program after compilationHicsworld. dll.
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Using
Microsoft. sqlserver. server
Closure is translated as a "closure" and it is too academic to wrap it. The following reference books and online resources are briefly discussed (please pay attention to improper understanding ).1. What isClosureThe official answer: the so-called "closure" refers to an expression (usually a function) with many variables and an environment bound to these variables ), therefore, these variables are part of the expression.After reading the definition above, if you are not a master, I firmly believe
1. Disable echo
In this way, only the commands output by ECHO will be displayed.
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->@ Echo off
2. Display Information
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Play with ECHO batch processing! /* Display batch processing for fun! */
3. No questions are as
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