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Like other languages, loops are also script patterns in the shellOne. Grammar: while [expression] do operation ... done As long as the expression in [] is set, it will continue to loop. Notice that there is a space between [] and the expression. The process is to first determine whether the expression is ture or false. The comparison of the values in the while expression is:EQ: equivalent =; GE: equivalent to >=; Le : equivalent to equals ! =;GT: equivalent to >, lt is equivalen

When configuring a Web server, we often encounter the problem that, for some reason, the server can only have one public network IP, but may need to provide other machines or other webserver servers on the computer to visitors, but also do not want to use other ports, if under Linux, A common solution is to use Nginx as a front-end server and indirectly access other webserver via a reverse proxy. Before IIS7, it's not easy to implement this feature on Windows, but on IIS7, through

We are now on the shelf iOS app is usually used in Apple's application Loader application Loader, this tool is very good to help developers on the shelves, but this tool can only be used on the Mac computer, restricting the use of the environment. Now many developers through other development platform development applications, no build Mac environment, upload app will encounter obstacles, some developers to

Blockchain technology Application _ Blockchain technology application How big is the market? The impact of blockchain technology has been growing rapidly since 2015. At the time, the arcane technology behind the digital currency was likely to change the financial system. Cut By the end of 2016, big companies such as Bank of America and Goldman Sachs have said blockchain technology has huge potential, and

The last time I wrote a system architecture based on MVC pattern and command mode, I also made a simple example. After writing what I want to write, I want to use a specific project to concatenate most of the design pattern ideas. What I want to say today is the single piece mode. First of all, a simple description of what is a single piece mode, also known as Singleton mode, to achieve a single instance of the function, not specifically said, do not understand the other introduction of conce

access|application| Program | access | Data Digest The data Access Application Block is a. NET component that contains optimized data access code that can help users invoke stored procedures and emit SQL text commands to SQL Server databases. It returns SqlDataReader, datasets, and XmlReader objects. You can use it as a building block in your own. NET application

The 1.In general, when building an Android application, the default Androidmanifest.xml file already contains some default Android:backupagent= "string"Android:debuggable=["true" | " False "];Android:description= "String Resource"Android:enabled=["true" | " False "]Android:hascode=["true" | " False "]Android:hardwareaccelerated=["true" | " False "]android:icon= "Drawable Reource"Android:killafterrestore=["true" | " False "]Android:label= "String Resou

1. application objects can be used to implement applications Program Status Management (1) ApplicationApplication: ◆ Count the current number of people on the site ◆ It can be used for communication between different users on the website ◆ You can record the number of clicks on an advertisement bar ◆ Dynamic information can be displayed on each Homepage ◆ Data can be extracted from the database for multiple webpages (2) createApplicati

Microsoft. NET is an applicationProgramDevelopers provide a wide range of programming models and types for processing configuration data. With these components, developers and users can easily intervene in application execution behaviors and results by setting configuration data without re-compiling the application, so that the same application can meet the speci

Android configuration file (3) ---- root node of the application 1. Generally, when an Android application is generated, the default AndroidManifest. xml file contains some default Android: backupAgent = "string" Android: debuggable = ["true" | "false"]; Android: description = "string resource" Android: enabled = ["true" | "false"] Android: hasCode = ["true" | "false"] Android: hardwareAccelerated =

In the previous article, the author gave you a detailed introduction of the ASP built-in object Response use method, in this article, the author will continue to introduce another two very useful and important ASP's built-in object application and session. In addition to the objects used to send, receive, and process data in an ASP's built-in objects, there are some very useful objects that represent Active Server applications and individual user inf