Whether we choose to pay 10 dollars a month, or a year to pay 10 U.S. dollars VPS, servers, whether we choose to set up a 3-month host, or choose to set up a 30-year host, as long as we choose to use and used to store useful data, such as Web sites. We all need to be prepared to keep and back up data, to understand the importance of data. We can choose to manually replicate backups locally, or we can choose
This article mainly introduces seven methods for JS to obtain Client IP addresses, MAC addresses, and host names. JS itself does not support obtaining IP addresses and other information. This article uses other methods to achieve this, if you need a friend, you can refer to the small program that is engaged in JS (java
screen.availheight: computer effective height (except taskbar)//navigator:Navigator.platform The default language of the OS navigator.systemlanguage OS running the browser navigator.userlanguage the natural setting language of the OS Navigator.cpuclass OS CPU level navigator.appname browser name navigator.appcodename browser code name Navigat Or.appversion Browser version navigator.appminorversion browser secondary version navigator.useragent returns the user-agent header of the server sent by
First, the host environment is explained: The general hosting environment is created and maintained by the shell, as long as the environment can provide the JS engine execution can be called the shell program. such as: Web browser, some desktop application system, etc. That is, the Web browser or these desktop application systems have long been the environment, the hosting environment.Local objectsECMA-262
Node. js remotely connects to the MongoDB database server on another host
My MongoDB is installed in linux.
First, add a user
1. First, run the terminal command line on the MongoDB server host and enter
Mongo
2. Enter use admin to access the user management database.
3. db. addUser ("username", "password"); here, the username and password are the username and pas
JS obtains the Client IP address, MAC, and host name in seven ways.
Today, I am engaged in JS (javascript) mini-programs for obtaining client IP addresses. I searched the internet and found that many of the current systems and browsers are ineffective and helpless, in Chrome and FireFox, JavaScript scripts such as obtaining IP addresses using ActiveX are rarely o
If directly in JS can be directly taken to the hostname, the following way is through regular matching:var url = "Http://www.cnblogs.com/cench" var reg =/^http (s)?: \ /\/(.*?) \////must be HTTP start or HTTPS, end with '/'//replace Host with specified value var toreplace = ' host/' Url.replace (Reg, Toreplace)//host/
This post was finally edited by the non-solution, on 2012-9-9 12:13 This figure comes from the P184 page of the third chapter of the JavaScript Language essence and programming practice. Recently in the second edition, this picture has been re-done, need to be able to see the comparison.In addition, the concept used in the supplement one:1. The difference between the built-in (build-in) object and the native (Naitve) object is that the former object is always created at the engine initialization
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