zfs meaning

a the meaning of JavaScript . Javascript is a browser-side scripting language that can access the elements of a Web page and run its own browser, allowing you to manipulate elements, create new elements, and so On. Its main functions are:1. open a new window with the specified size, position, and style (such as whether it has borders, menus, toolbars, etc.);2. provide user-friendly navigation help, such as Drop-down menu;3. Inspection Web Form input

Meaning of cpu usage in linux top Command, linuxtop Meaning of cpu usage in linux top Command[Respect for original articles from: http://www.iteye.com/topic/1110848]CPU usage of 0.3% us user space1.0% sy CPU usage in kernel space0.0% percentage of CPU used by processes that have changed their priorities in ni user process space98.7% id idle CPU percentage0.0% wa CPU time percentage waiting for Input and Out

In Linux, the meaning of CPU load and CPU usage indicates that the Nagios alarm information was viewed yesterday. It was found that the CPU load on one of the servers was too heavy and the machine was CentOS. Information: 2011-2-15 (Tuesday) 17: 50 WARNING-load average: 9.73, 10.67, 10.49There are also alerts sent in the previous two hours: (Tuesday) 16: 50 WARNING-load average: 10.52, 10.10, 10.062011-2-15 (Tuesday) 15: 40 WARNING-load average: 8.27,

What is Web analytics?Website analysis refers to the access to the site, such as the basic data, analysis of the site data, to discover the law and characteristics of visitors to visit the site, and these laws and network marketing strategies, and so on, to discover the current network marketing activities and operations may exist problems and opportunities, and provide a basis for further revision or re-enactment of the strategy. The meaning of websi

appear in JSPExtracted code:Webapplicationcontext WAC = Webapplicationcontextutils. Getwebapplicationcontext (This.getservletcontext ());Userdao Userdao = (Userdao) wac.getbean ("Userdaoimpl");String in= (String) request.getparameter ("id");System.out.println (in);int Num=integer.parseint (in);%>Webapplicationcontext Wac=webapplicationcontextutils.getwebapplicationcontext (This.getServletContext ());What is Webapplicationcontext?What is Webapplicationcontextutils?What is This.getservletcontext (

Ah, this question is a bit interesting .. At the beginning, I couldn't understand the meaning of the question. I found that many ACM questions were like this, and many English meanings could not be fully understood. So I had to guess it. I couldn't guess it ?? That's why God's teammates explained it. Is the arrangement, coloring to maximize the results. However, others' blogs clearly explain the meaning of

you have tested, with the new version of Android?? OID, you should test the application in the new version and update it to conform to the latest APIs and take advantage of the new platform features.Compile with: Represents the platform version of the application at compile time. By default, the SDK is set to the latest version.Theme: Specifies the Android UI style that applies to the application. You can ignore it first.Click Next.3. In the next dialog box, leave the default options and click

An understanding of the four parameters (ARG) of the Onitemclicklistener listener for the adapter interface in Android development:Code: public void Onitemclick (adapterviewIf there is a ListView, the ListView contains the A,b,c,d 4 item.If you order b this item. As follows:(1) public void Onitemclick (adapterview/* The parent is equivalent to a pointer to the ListView adapter, which can be used to get everything in the ListView */(2) View view,/* View is the handle to the view that you point to

\ Do as a turn, that is, usually after the "\" character is not interpreted as the original meaning, such as/b/match character "B", when B is preceded by a backslash/\b/, turn to match the boundary of a word.OrThe restoration of a regular expression feature character, such as "*" matches its preceding metacharacters 0 or more times,/a*/will match a,aa,aaa, adding "\",/a\*/will only match "a *".^ matches the beginning of an input or a line,/^a/matches

1:1-d array int a[5];A: is the array name. A left value represents all of the space (10x4=40 bytes) of the entire array, andbecause the C language specifies that an array operation should be independent of a single operation, the array cannot be manipulated as a whole, so a cannot do an lvalue A right value indicates the first address of the first element of the array (the No. 0 element of the array, that is, a[0]) (the first address is the starting address, which is the first byte in the 4-byt

The meaning of using the Apply function or the call function:In the face of object programming, when a object calls other objects instead of the A object method, all of the this references in the method point to the object in which the method resides, not the context of the current code, which is a object.To maintain the original point of this (that is, the A object), you need to use the Apply or call function.The difference between apply () and call

The most complete site metadata meta tag meaning and how to use itWith the popularity of HTML5 and the evolution of web technology, the META tag team is growing, from Windows XP IE6 to now Windows 7, Windows 8 IE9, IE10, IE11, HTML5 support is getting better. The function of HTML meta tags is becoming more and more powerful.First of all. Let's start with some of the first ones that are often used with meta tags.Start with the definition of meta tags.T

adapts to the position of the element and does not change the layout (this leaves a blank space where the element originally resides). Position:relative to Table-*-group, Table-row, Table-column, Table-cell, table-caption invalid. Absolute does not reserve space for elements, and the element position is determined by specifying its offset from the ancestor of its nearest non-static location. An absolutely positioned element can set margins (margins) and is not me

Transfer from http://www.jb51.net/article/51892.htmMany beginners just start to learn python often see python in __name__ = \ ' __main__\ ' such code, may be a lot of novice start learning at the time are more confused, python __name__ = ' __main__ ' role, What are you doing?There is a phrase that sums up the meaning of this code in a classic way:"Make a script both importable and executable"It means that the script module that you write can be import

After building the Linux environment, the meaning of each system directory and what kind of files are saved are described in detail as follows:1,/bin: Generally executable binary files, for all users.2,/sbin: Generally executable binary files, only for the administrator to use.3,/dev: device files, for example: Network card, disk, etc.4./etc: Configuration file5./home: User's House directory6./lib: Shared libraries and kernel modules7,/media and/mnt:

The meaning of the Linux command chmod 755chmod is Linux The following number represents the permissions for different users or groups of users under the command to set file permissions. It is usually three digits:The first number indicates the permissions of the file ownerThe second number indicates the permissions of other users who belong to the same user group as the file ownerThe third number represents the permissions of the other user groups .P

The meaning of shell variable $#,[email protected],$0,$1,$2 in Linux is explained:Variable Description:$$The PID of the shell itself (ProcessID)$!PID of the Shell's last running background process$?End code of the last Run command (return value)$-Flag at a glance using the SET command$*All parameter lists. such as "$*" in the Case of "" ", in the form of" $ $ ... $n "output all parameters.[Email protected]All parameter lists. such as "[email protected

The Bean class in Spring configuration uses the meaning of the factory bean to parseThe beautiful Life of the Sun Vulcan (http://blog.csdn.net/opengl_es)This article follows "Attribution-non-commercial use-consistent" authoring public agreementReprint Please keep this sentence: Sun Vulcan's Beautiful Life-this blog focuses on Agile development and mobile and IoT device research: IOS, Android, HTML5, Arduino, Pcduino , Otherwise, the article from thi

immediately initializes the optional type variable or constant to nil. Before calling the Init method.When accessing the optional Type property, if we determine that the property must have a value at this time, you can add "!" after the property name. "Tell the system," I'm sure this optional attribute has a value, force it out to use ", however, if the optional type attribute has a value of nil, then it will be crash. Oh. (If you access a property or call a function, you must use "!" Or "?", a

back down, then I let the wheel after the maintenance of balance, the principle should understand it! ( If this principle does not understand the proposal do not learn, but also do not control the direction, to avoid learning for a while to change the time to waste ) to continue, assuming that the car gyro angle 0 degrees when the car is balanced, if the angle is greater than 0 degrees I let the wheel forward, if the angle is less than 0 degrees I let the wheel turn, Obviously, the car is not b