rf basics tutorial

typed:Then the browser of the other customer viewing the message will die due to a dead loop. ASP Development Program also may have this problem, so when you use ASP to write a similar program should be good to prevent such operations, such as can write a program to determine the client input, and block out all the HTML, Javascript statements.After reading this issue, if you are shocked, then you must thoroughly check your existing website or ASP program to see if there are any of these vulnera

input selected when submitting the form is uploaded, interacting with the database, but this is something. 3. Submission of the form, The type attribute's submit is the most commonly used method of submitting a form, giving the type a value value that can be displayed directly on the Submit button. In addition, the submit submission of the form needs to be opened to the form Label actin property to specify the action of the form when it is uploaded, and if omitting the action attribute does no

mysql| Basics Tutorial SQL in MySQL For MySQL, the first thing you have to keep in mind is that each line of its command is separated by a semicolon (;) As the end, but ... There is no complete absolute thing, and here is the same. As I mentioned earlier, when a row of MySQL is inserted into the PHP code, it is best to omit the semicolon, for example: mysql_query ("INSERT into TableName" (First_Name, Las

, you can resize the picture, dynamically edit the CSS style rules, change the form method from Get to post (or vice versa), and there are many more. We have also introduced some advanced JavaScript technologies, such as object-oriented programming. First, you learned how JavaScript uses a prototype based mechanism to simulate inheritance. It then learned how JavaScript uses private properties that can only be accessed through public methods to support the concept of information hiding. Finally

this tool is called extrusion (crunching), and simply deletes all comments and line breaks. The documentation for this tool is said to save 20%~50% bandwidth. Using the crunch mode, you can see that the size of the JavaScript file is reduced by 30%. The highest level of compression in this tool is called compression (compressing), is a real compression mechanism for the actual compression of JavaScript source code, and to the file to increase the automatic decompression function. The documenta

XMLHttpRequest object, you need to check the type of browser. A real business-like protocol can reduce this code-writing effort. Basically, loading and saving the specification provides a common API for Web developers to access and modify the DOM in a platform-and language-independent way. In other words, whether your platform is Windows or Linux, it doesn't matter whether you're developing it in VBScript or using JavaScript. You can also save a DOM tree as an XML document, or load an XML docum

You might want to know what the difference between get and post is and want to know when to use them. Theoretically, if the request is idempotent, get can be used, and the so-called idempotent means that multiple requests return the same result. In fact, the corresponding server method may modify the state in some way, so this is generally not true. This is just a standard. The more practical difference is in the size of the net charge, and in many cases the browser and the server restrict the U

the browser supports ActiveX controls. It is appropriate to know if the browser is Internet Explorer. If it does, create a XMLHttpRequest object by instantiating a new instance of ActiveXObject, and pass in a string indicating what type of ActiveX object to create. In this example, the string provided for the constructor is microsoft.xmlhttp, which means you want to create an instance of the XMLHttpRequest. If window. ActiveXObject call fails (returns NULL), JavaScript will go to the Else stat

of tricks to circumvent the Internet's trouble limits. With a variety of remote scripting methods and HTML elements, developers can communicate asynchronously with the server, but the real cross-browser approach is possible until a mainstream browser provides support for the XMLHttpRequest object. Companies such as Google, Yahoo and Amazon are already ahead of us, and we can see that browser-based applications are also comparable to those of fat customers. With Ajax, you can take advantage of b

developers jump out of the Ajax details. However, you still have to know something about JavaScript. We know that JavaScript can be difficult to use. But unfortunately, there is no way to do that. Most of us have learned this trick, "alert" as a type of system output to help debug, unfortunately, this technology is widely used. But now we have a new weapon. In addition to JavaScript, you need to familiarize yourself with other techniques associated with presentation, such as HTML, DOM, and CSS

study magnetic fusion energy, In addition, a csnet was created to carry out computer science research, funded by the National Science Foundation (Foundation). Tim Berners-lee of the European Centre for Particle Physics (CERN) in 1989 presented a very interesting concept. Instead of simply quoting other people's writings, he thought, would it be better to have practical links? When reading an article, the reader can open other articles that are referenced. Hypertext (hypertext) was quite popula

In the/etc/default/useradd file, add the user rule file for the setting.1 # useradd defaults file2 group=100 # User group ID3 Home=/home #把用户的家目录创建在/home.4 Inactive=-1 #是否启用帐号过期停权, 1 means not enabled.5 expire= #帐号终止日期, no setting indicates not enabled.6 Shell=/bin/bash #所用SHELL的类型7 Skel=/etc/skel #默认添加用户的目录默认文件存放位置. That is, when users add users with Useradd, the files in the user's home directory are copied from this directory.8 Create_mail_spool=yes #是否创建用户邮件缓冲, yes means createLinux

these numbers2) Print the second largest number of these numbers3) Delete the smallest number4) Print the remaining number andAnswer:" Heool " "". Join (s)print"-" . Join (s) Print L7.To generate a list of 1~100 inside odd numbers using a list deductionThe result is: [1, 3, 5, 7, ..... 99]Answer: for in range (1, 2)]print(L) for inch if x% 2 = 0]print(L)8.Generate a list of squares with a value of 1 ~ 9, minus all the odd squaresAnswer: for in range (2, 2)]print(L) for inch if x% 2 = = 0]pri

output and standard error to a fileCommand 2> FileName: Redirect standard error to a fileCommand 2>> FileName: Redirect standard error to a file (append)Command >> filename 2>1: redirect standard output and standard error to a file (append)Command Command Command Command Command >m: Redirect standard output to file descriptor MCommand Example:Cat file} sort > Sort.out sorts the string of file (per line) and outputs the sort results to the Sort.out file>nullfile Create an empty file NullfileSort

original directory5) Echoecho Message "I love You" shows something under the character interface, here is "I love You"6) ExportExport lc_all= defines a variable lc_all and is set to NULLExport lang=zh_cn.gb2312 defines the value of a variable LANG is zh_cn.gb2312Export http_proxy= "Http://xxx.xxx.xxx.xxx:port"Defining an HTTP Proxy server7) Findfind-iname [Directory] file name in the specified directory (if you do not specify the directory is the current directory) to find files of the specifie

s = ' Hello world! 'Print (S.capitalize ()) #第一个字母大写, remaining lowercase# Output: Hello world!Print (S.swapcase ()) #大写变小写, lowercase to uppercase#输出: HELLO world!Print (S.casefold ()) #全变小写#输出: Hello world!Print (S.center, '-') #S字符字符串在总50宽度的居中位置, with "-" padding on both sides#输出:-------------------Hello World!-------------------Print (S.count (' l ')) #统计字符串中有多少个 ' l '#输出: 3Print (S.count (' l ', 0,5)) #统计字符串中从第一个字母到第5个字母, how many ' l '#输出: 2Print (S.endswith (' d ')) #判断字符串是否已 ' d ' end#输出

as the characteristics of the object-oriented programming, and is improving the template-characterized generic programming. C + + is a hybrid programming language, which can be programmed by program design method for various purposes. It does not abandon the practical characteristics of efficient operation, but also strives to improve the programming quality of large-scale programs and improve the problem-description ability of programming language. The standard C + + standard C + + program

object again and add a new property to it 4 5 var a=[1,2,3]; // Arrays are also modifiable 6 a[0]=0; // 7 a[3]=4; // add an element to the array Comparisons of arrays and object types are reference comparisons, similar to the Java language, where two objects are unequal, even if they are of the same type and have the same property values. Only two references point to the same object, and the two references are equal.Type conversionsBecause of the weak type of

! One practice per day(1) Remove all preceding spaces in the string. Lstrip(2) Remove all the blanks behind the string. Rstrip(3) Remove the spaces on either side of the string. Strip>>> a = "ABC Test">>>>>>>>> Print A.rstrip ()ABC Test>>> Print A.lstrip ()ABC Test>>> Print A.strip ()ABC Test>>>String "ABCdef"(1) Please export it to uppercase(2) Please export it to lowercase>>> dir (str)>>> a = "abcdef">>> A.swapcase ()' ABCDEF '>>> A.lower ()' ABCdef '>>> The

software development clearly and intuitively, clarify the specific tasks that need to be completed in each stage, and play a guiding and normative role in the development process. Software Development Methodology Programming style documentation; Have a clear name for the identifier; appropriate procedural notes; The procedural writing style of Liang-ha; The form of indentation; A clear statement structure; The writing of expressions shou