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The role and difference of $.extend and $.fn.extend of jquery

example, we want to develop a plugin, make a special edit box, when it is clicked, then alert the contents of the current edit box. You can do this:$.fn.extend ({alertwhileclick:function () {$ (this). Click (function () { Alert (This). Val ()); }); } });$ ("#input1"). Alertwhileclick (); On the page is:$ ("#input1") is a jquery instance, and when it calls the Member method Alertwhileclick, it implements the extension, which pops up the contents of the current edit each time it is clicked.jque

An in-depth analysis of PHP variable scopes _php tutorial

values. For most junior programmers, this is a confusing concept. To change the scope of a variable within a function, you can use the global statement. Copy CodeThe code is as follows: Code highlighting produced by Actipro Codehighlighter (freeware) http://www.codehighlighter.com/--> function function_name () { Global $var; } $var = 20; Function_name (); Function call. ?> In this example, the $var inside the function is now the same as the $var ou

As3 study notes (ii) Basics

1. Objects and typesIn ActionScript 3.0, all classes (both built-in classes and user-defined classes) are derived from the object class.However, the objectThe data type is no longer the default data type, Although all other classes are derived from it.In ActionScript 2.0, the following two linesCodeEquivalent, because the lack of Type annotations means that the variable is of the object type: Code highlighting produced by Actipro CodeHighlighter (freeware

Build a powerful Python IDE in Emacs

This article will introduce how to build a powerful Python IDE environment through various extensions in Emacs, includingSnippet tool, smart prompt, Automatic completion, reconstruction tool, debugging, and Gae debuggingAnd so on. The prerequisites for installing the following tools are that you have a certain understanding of the Emacs configuration file. All the relevant El files must be placed where load_path can be loaded. 1. yasnippet Snippet tool. You can customize some templates, whic

Re-debugging: License Plate Recognition

highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> Get_image_pointer1 (fullimage, pointer, type, width, height)Gen_rectangle1 (rectangle, height * 0.1 , Width * 0.1 , Height * 0.9 , Width * 0.9 )Performance_domain (fullimage, rectangle, image) Check the cropping result: 3. grayscale the selected area to facilitate subsequent processing: Code highlighting produced by Actipro

Objective-C 2.0 with cocoa Foundation-4, inherited

and save the changes. Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> # Import Foundation / Foundation. h > # Import " Cattle. h " @ Interface BULL: cattle {Nsstring*Skincolor;}-(Void) Saysomething;-(Nsstring*) Getskincolor;-(Void) Setskincolor :( nsstring*) Color;@ End Step 7: Open bull. M and make the following changes and save Code highlighting produced by Actipro Co

How to read a whole document content into a string one-time

If we want read the content into a buffer, we can use the Function Getline () For example, the following code usesGetline ()Function to displayFirst 100 characters from each line of a text file: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Int max_length = 100; Char line [max_length]; While (Fin. Getline (line, max_length )) { Cout } and, if we want to read the content into a string, we also use th

CYQ. The path to the lightweight Data layer of Data)

In fact, I didn't want to write help because there are a lot of examples in the following articles: CYQ. Data lightweight Data layer application example 1 message board (4) CYQ. Data lightweight Data layer road to gorgeous upgrades V1.3 (5) CYQ. Data lightweight Data layer path application example 2 online chat (6) CYQ. Data lightweight Data layer elegant V1.4 now with API help documentation (9) However, many people are still very lazy. when they enter the group, they will ask how to use it. L

DotNetNuke (DNN) Upgrade Strategy (DNN 4.3.7 to DNN 4.6.0)

: \ WebsiteBackup \ DotNetNuke. the config file is used to modify the database connection. If the security settings are the same, you only need to change the database name from "DNNWebsite" to "DNNWebsiteUpgrade ". Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->ConnectionString = "Server = (local); Database = WebsiteDNN WebsiteDNNUpgrade; uid = WebDNNAdmin; pwd = ourpassword ;" ProviderName = "Sys

Python delicious everyday (35)-Premium lambda

Document directory Lambda Basics Not lambda? Lambda broken? A lambda function is also called an anonymous function. That is, the function has no specific name. Let's take a look at the simplest example: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Def f (x ): Return x ** 2 Print f (4) If lambda is used in Python, it is written as follows: Code highlighting produced by Actipro CodeHighlighter

Jquery.extend function (reprint)

Reprinted from Http://www.cnblogs.com/RascallySnake/archive/2010/05/07/1729563.htmljquery's Extend extension method:The extension method of jquery extend is a common method in the process of writing plug-ins, there are some overloaded prototypes, and here we go to understand.One, the extension method of jquery prototype is:    Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Extend (dest,src1,src2,src3

JavaScript Practical Tips (i) _javascript skills

The success of JavaScript is a great relish, writing JavaScript code for Web pages is the basic skill of all web designers, and this interesting language contains many things that are not well known, even for years of JavaScript programmers who have not fully understood them. This article is about 7 aspects of JavaScript that you are not familiar with but very practical techniques. Brief statementJavaScript can use abbreviated statements to quickly create objects and arrays, such as the follow

Refactoring-make the code more concise and elegant: Practical Experience (provides a skill that allows you to save N more code)

I haven't written much in the past few days, because I used the CYQ. Data framework to reconstruct the source code of a previous blog. in the reconstruction process, the most important thing is to simplify the code. Today, I will describe a very typical example. After reading this example, don't be surprised, don't doubt, it's not a magic horse, it's not a float cloud, It is a very practical way to save N more code and make your code look more concise and elegant. A typical example here is ap

CYQ. The path to the lightweight Data layer of Data using the triqu MAction value assignment (14)

Previous Article: CYQ. Data lightweight Data layer road to use Article II. MAction Data Query (13) Content Overview Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->This article continues with the previous article. This section describes all operations related to values and assignments. 1: Native: Like Row Operations2: extended: GetFrom and SetTo operations on the UI3. Extension: Get and Set for non-U

Explanation of common ADO. Net objects: DataSet objects

The function of dataset in ADO. NET is to provide a disconnected storage for the data source without having to worry about the data source. You can only perform operations in dataset.Important objects in Dataset:Tablescollection object:The tables in dataset are represented by datatable. a dataset can contain multiple datatable tables, which constitute the tablescollection object. Each able contains a columnscolleciton and a rowscollection object.Relationscollection object:The relationships betwe

. Net programmers learn PHP: common programming errors

ArticleDirectory 1. small mistakes can make a big disaster 2. I forgot to add a semicolon after break or continue. 3. Single or double quotation marks? 4. Compare floating point numbers 5. Can we call method_exists () if the returned result is true? 6. Use uninitialized Arrays 10. Use = to compare the data type. 11. The empty () method and the magic method _ Get are used together. 12. No protection for sensitive data in the session In this article, I will

Twiki Installation and Use experience

Twiki is an open-source (GPL) wiki.Program. The software is positioned as a flexible, powerful, and easy-to-use enterprise collaboration platform that runs in the Perl environment. People with programming skills can use variables to create dynamic pages, such as content tables or embedded search results pages. The default built-in WYSIWYG editor provides a complete user permission system that does not require any databases and is completely based on the file directory formatting engine. Deploy

Go to Google open-source C ++ unit testing framework Google test series (gtest) 4-parameterization

I. Preface When designing a test case, you often need to consider passing different values to the tested function. Our previous practice is usually to write a general method and then compile it in the test case to call it. Even if a general method is used, such work is repetitive,ProgramThe employees are too lazy to write less.CodeTo reuse code. Google programmers also considered this issue and provided a flexible parametric testing solution. Ii. Old Solutions For comparison, I will mention th

Python every day (17)-open read/write files

ArticleDirectory 1. Open 2. Read files 3. Write files In python, file operations can be implemented through open functions, which is indeed similar to fopen in C. Obtain a file object through the open function, and then call the read (), write () and other methods to read and write the object. 1. Open After opening a file using open, remember to call the close () method of the file object. For example, you can use the try/finally statement to ensure that the file can be closed

Basic JavaScript Learning (1)

I have been studying. Net for nearly two years. Recently I learned about Ajax and found that many of my technical skills are lacking, such as JavaScript. This is my first note in the park. In the future, I will write my learning notes as well. If I have time, I will also sort out my previous documents. 1. Introduction to Javascript: Before learning JavaScript, you need to know something first: Html XHTML I don't think it should be too deep. Just give me a rough idea. Javascript is:

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