ecmascript 5 tutorial

OC tutorial 5-delegate mode callbackOC5-delegate mode callback This chapter describes the callback interfaces that have been implemented in the delegate mode.1. Delegation Mode Delegation mode is a development mode exclusive to OC syntax. It is a rapid development mode based on component assembly. This mode ensures high flexibility and versatility of components. It is an open interface of components. The fo

1. Function creation1). function code block starts with DEF keyword, followed by function identifier name and parentheses ()2). Any incoming parameters and arguments must be placed in the middle of the parentheses. Parentheses can be used to define parameters3). The first line of the function statement can optionally use the document string-for storing function descriptions4). function contents start with a colon and indent5). Return[expression] End Function, optionally returning a value to the

. *@ The Prioritylistviewcomponent class and the index view are displayed in slices to modify the effect:650) this.width=650; "Width=" 416 "height=" 526 "title=" image "style=" border:0px;padding-top:0px;padding-right:0px; Padding-left:0px;background-image:none; "alt=" image "src=" http://images.cnitblog.com/blog/139239/201501/ 091043437341532.png "border=" 0 "/>Specify the view nameSome complex VCs may need to specify a particular view in some cases, the following code is the method of specifyi

; @await component.invokeasync ( "prioritylist"2true) The Prioritylistviewcomponent class and the index view are displayed in slices to modify the effect:Specify the view nameSome complex VCs may need to specify a particular view in some cases, the following code is the method of specifying the view through the InvokeAsync method: Public AsyncTaskintMaxpriority,BOOLIsDone) { stringMyView ="Default"; //If asking for all completed tasks, render with the "PVC" view. if(Maxpriority

This article mainly introduces the typecho plug-in compiling tutorial (5): Core code. This article describes the complete example of the core code of the plug-in. For more information, see the previous example, now, write the core code. Analysis: When publishing an article, we need the URL of the current article. We need to find a way to get it from $ contents and $ class. Currently, our plug-in class code

.To the next level of the ancestral element div#ab which they share, Div#a_inner5 's ancestral elements include: Div#a,div#a_inner1,div#a_inner2,div#a_inner3,div#a_inner4;div#b_ Inner4 's ancestral elements include: Div#b,div#b_inner1,div#b_inner2,div#b_inner3.Then analyze their ancestral elements with dynamic positioning: The elements of div#a_inner5 that contain dynamic positioning are: the elements of the div#a,div#a_inner3;div#b_inner4 ancestor element are: Div#b_inner3.Then compare them wit

[Original address] Silverlight tutorial Part 5: using the ListBox and databinding to display list data[Original article] Friday, February 22,200 AM This is Part 1 of the eight series of tutorials. This series demonstrates how to use beta1 of Silverlight 2 to create a simple Digg client application. Please read These tutorials in sequence to help you understand some core programming concepts of Silverlight

Yii quick learning tutorial (5) ------ user authorization 1. Configure/config/Main. php 'Components' => array ('Authmanager' => array ('Class' => 'cdbauthmanager ','Connectionid' => 'db'), : 2. Create the required data table. authitem (Operation definition table, user and operation definition). authitemchild (permission definition table role --- operation). authasignment (authorization table, user -- Role)

SQLite tutorial (5): Index and data analysis/cleanup, sqlite Data Analysis I. Create an index: In SQLite, the SQL syntax for index creation is basically the same as that of most other relational databases, because here is just an example usage:Copy codeThe Code is as follows:Sqlite> create table testtable (first_col integer, second_col integer );-- Create the simplest index, which is based on a field in a t

Database Tuning tutorial (5) Roles of indexes and types of indexes, tuning IndexesIii. Index In the previous chapter, we learned how to use explain to generate a query execution plan (QEP), so as to discover problems with the statement. Three results returned by explain are related to the index (possible key, key, and extra). It can be seen that the index plays a significant role in improving the query eff

Typecho plugin compilation tutorial (5): Core code, typecho plugin I used to get a lot of code, and now I am writing core code. Analysis: When publishing an article, we need the URL of the current article. We need to find a way to get it from $ contents and $ class. Currently, our plug-in class code is as follows (Please note that the render has been changed to send) Copy codeThe Code is as follows:Class Ba

elements belong to the namespace. For the XML above, the parser can easily distinguish people: title from title. There is another way to define a namespace: This declaration does not provide a namespace prefix name. we can think that the URI identifies a default namespace. For example Indicates a default namespace. Unless the element contains other namespaces to overwrite, all elements with no prefix in the hr element and its content belong to the namespace marked #. After learning about t

PHP + MySQL tutorial (5): The MySQLSelect SELECT statement is used to SELECT data from the database. Select data from the database tableSELECT statements are used to SELECT data from the database. SyntaxSELECT column_name (s) FROM table_name note: SQL statements are not case sensitive. SELECT is equivalent to select. To allow PHP to execute the preceding statement, we must use the mysql_query () function.

call it directly.Recursive call of functionsRecursion refers to self-calling itself. for example, if a function calls itself, recursion is an algorithm. its professional saying is:Recursion solves a large and complex problem by converting it into a small problem similar to the original problem, the recursive strategy can describe the repeated computing required in the problem-solving process with only a small number of programs, greatly reducing the amount of code in the program.Here we will ju

according to the value of the constant YII_DEBUG. By default, this constant value is defined as false, meaning the production mode. To run in debug mode, you need to define this constant to true before including the yii. php file. Running an application in debug mode is less efficient because it requires a lot of internal logs. In addition, the debugging mode is very useful in the development environment because it provides a wealth of debugging information when errors are generated. defined('Y

HTML Dom tutorial 5-html Dom node access 1: common methods for finding and accessing nodes Use the getelementbyid () and getelementsbytagname () methods; Use the parentnode, firstchild, and lastchild attributes of an element node; Access the document root node. 2: getelementbyid () and getelementsbytagname () Getelementbyid () and getelementsbytagname () can be used to find any HT

( //add a line of logs alert ( ' teenager ' Code class= "JavaScript plain"); // the Else clause of the above code is actually only responsible for executing console.log (' Age , the original alert (' teenager '); no longer belong to If...else ... control, and it executes every time. Multi-line condition judgmentIf you want to judge the condition more carefully, you can use multiple if...else ... Combination of:[JavaScript]Plain Text view copy code ? 00100200300400

is:SummarizeThis article has made minor improvements to the HTML helper knowledge points used in the previous article:The custom HTML helper naming is standardized (the class name is Xxxextensions and the native form is unified);Returns the mvchtmlstring type directly so that the HTML string is not escaped and can be called directly from the front end.Custom HTML Helper is very useful, you can dig a lot of usage scenarios.Welcome all comments, wish the study progress:)P.S.In the example, the fr

is:SummaryThis article has made minor improvements to the HTML helper knowledge points used in the previous article:The custom HTML helper naming is standardized (the class name is Xxxextensions and the native form is unified);Returns the mvchtmlstring type directly so that the HTML string is not escaped and can be called directly from the front end.Custom HTML Helper is very useful, you can dig a lot of usage scenarios.Welcome all comments, wish the study progress:)P.S.In the example, the fron

below Click Add The controller and view corresponding to the model class are automatically added to the project for the operation of the model for additional pruning and checking.In Solution Explorer, right-click the Views folder under the Employees folder under the index.cshtml selection in the browser. The following results are obtained.You can see an empty list of the model's corresponding.Let's look at the database below. Click Show All files as shown in the small icon below Soluti