what is difference between ipv4 and ipv6

What is service: Service. The name is similar to the "service" that we normally understand. It runs in the background and can interact with each other. It is similar to the activity level, You cannot run it on your own. You need to call it through an activity or other context objects, including context. startservice ()

such as the User's avatar some people say is saved on the server I do not know what the server is what ah in my mind there is no concept I know that the database is to keep things like the database can not save the Picture.

When we write a page, we often use the hidden, hidden methods, what are they different? You can set the opacity value to 0, set the visibility to hidden, or display set to none. But each approach has its differences, which allow us to make the right choices on a particular occasion. The following article will talk about their differences, so that we can choose the right way according to the occasion. 1.display:noneSet the Display property to none, us

What is the difference between the href and src in this article? The difference between the href and src in HTML is introduced, there is a certain reference value, the need for friends can refer to, I hope to help you. Href: HREF

, Google also provided a push method similar to Apple later. Not plagiarism. After all, there is no particular innovation in Apple's overall technological implementation.User battery?Apps developers will not consider it at the system level. He assumes that other Apps are less "unconscious ". What Google does not force is:No one is really responsible for the user'

Laravel in the construction method of the class is dependent on the injection __construct (User $user) and then the following methods are directly used $this->user call, with the direct use of user::find () What is the difference? What kind of comparison

Ask a weak question, for example, what is the difference between the following code when determining whether the array is empty? The {code...} is weak. For example, what is the

= new BufferedReader (new InputStreamReader (system.in));Same point:Inputstream,outputstream,reader,writer are abstract classes. So you can't just newThe difference between a byte stream and a character streamThe byte stream is very similar to the use of character streams, so what is the

$ Out quot; and then $ out. what is the difference between it and $ out? the following example shows PHPcode $ fp @ fsockopen ($ whoisserver, $ port, $ errno, $ errstr, $ timeout) ordie ( quot; socketError quot ;. $ errno. quot; $ out = "" and then $ out. = What is the

Java file class4. JDBC is very important, focusing on connection,preparedstatement, Statement,resultset,Others can be learned in a study or project if they meet again, but the early emphasis is on the front few, others understand enough,Database recommended for beginners with MySQL, download navicat for MySQL management tool5. If you want to get started quickly, then you need to skip these,Includes: thread

Java file class.4. JDBC is very important, focus on mastering connection,preparedstatement, Statement,resultset, other can be in the study or project if you encounter re-learning, but early focus on the previous few, others understand enough,Database recommended for beginners with MySQL, download navicat for MySQL management tool5. If you want to get started quickly, then you need to skip these,Includes: threading, network programming, GUI programmin

Php Chinese network (www.php.cn) provides the most comprehensive basic tutorial on programming technology, introducing HTML, CSS, Javascript, Python, Java, Ruby, C, PHP, basic knowledge of MySQL and other programming languages. At the same time, this site also provides a large number of online instances, through which you can better learn programming... Reply content: I personally understand the difference between a narrow front-end and a broad front-

. iscompleted)//synchronous call is not over, block up and wait.{This. Waitforwaithandle (entry. AsyncWaitHandle);}if (entry.exception! = null){Throw entry.exception;}return entry.retval;}What, did we finally see PostMessage? Marshaling is implemented through the Windows Messaging mechanism. The delegate method that needs to be marshaled

PHP functions to achieve the same function but the speed of the difference is what, why the speed is different? Reply content: PHP functions to achieve the same function but the speed of the difference is

Weak weak Ask a question, such as the following code, in determining whether the array is empty, what is the difference? $arr = array('a'=>'');if(array_filter($arr)) echo 'succ';else echo 'failed';if(empty($arr)) echo 'succ';else echo 'failed'; Reply content: Weak weak Ask a question, such as the following code, i