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Try to avoid using DOM. When you need to reuse the DOM, first save the reference to the DOM into the JavaScript local variable and reuse it. Replace the Document.createelement/appendchild () method with a method that sets the innerHTML. There are problems with eval (), andthe new Fuction () constructor also avoids using them as much as possible. The WITH statement is denied. It will cause you to go to the extra search for a namespace when you reference this variable, and the code in the with

, which means that a half connection, that is, one side requires a close connection, but also told the other side, I have some data to be sent to you, and then close the connection. Time_wait: said that received the other side fin message, and sent an ACK message, and so on 2MSL can return to the closed available state. If the fin_wait_1 state, received the other side with the FIN flag and ACK sign message, you can go directly to the TIME_WAIT state, without the fin_wait_2 state. CLOSING: This s

Recently looking for the PCI interface of the N more strange rare board, incidentally found that the PCI interface there are many kinds, there are long and short, is basically dizzy. So there are so many different shapes that I've found about explaining why the cards are called PCI interfaces. the difference between PCI and Pci-x the difference between PCI and PCI-E Here's what I copied from Baidu: First, destroy the few of you. "'" Note that the

be spread. Instead of wasting energy on keyword rankings, it is better to put energy and ideas on the spread of the brand, once the brand has been spread, bringing users and benefits is immeasurable. So how to do brand communication and lock users, here is not much to say, because the ox is also in the study, in this is not fraught. 3, technical knowledge to the transformation of marketing knowledge. Now in doing internet marketing, technical knowledge has gradually been eliminated, marketing

I believe that the majority of webmaster Friends of the site is not unfamiliar to the keywords, after all, we build a website on the need for our site to select some appropriate keywords. But when I talk to some novice friends, they often ask such a question "How our site should choose the keyword", so that some novice to the Site keyword choice is not very understanding, so I would like to share with you in the selection of key words of some experience, Hope to be useful to you, if you think th

satisfactory, but because there is no very practical data, but a lot of people feel, so this point, there is no very strong evidence to prove. very strong fault tolerance, good robustness A lot of people who write PHP should have this feeling, for example, you apply a variable in PHP, do numbers, do arrays, and do string. I have always wondered how he can be efficient in this casual style, and that it's amazing how people write this language compiler. rich functions and simple operations Can th

, and Afl-fuzz will replace "@@ 标记 with the test sample under the test sample directory (Testcase_dir) when it is actually executed. The corresponding commands are: $./afl-fuzz-i Testcase_dir-o Findings_dir/path/to/program @@ You can use the-f parameter to write data that has already been mutated to a specific file. This is particularly useful for requirements that require specific file name extensions to be specified. There are no piles. Binary can be fuzz by QEMU mode (add-q parameter on the

When the same servers carry out different service applications, they may encounter a very different breakdown, even some of the fault seems to be bizarre! But these strange server failures, often make our ordinary network management personnel to cope with the problem, and ultimately affect the efficient operation of the server. In view of this, we should be more from the actual combat point of view, more master some of the methods and ideas to eliminate the special server, in order to ensure tha

comes from a reputable site (such as downloading directly from SourceForge.net), then the security of the installation package should be trusted. If you decide to continue, press the Install button. At this point, Eclipse will start installing Eclipseme from the update site. At the end of the installation, you will see one of the following two dialog boxes: For installation For updates Although the newly installed dialog box suggests that you may conti

that appear most frequently are the most commonly used words----"," "Yes", "in"----. They are called "Stop words" (stop words), meaning that there is no help in finding the result, words must be filtered out. Let's say we filter them out and only consider the remaining meaningful words. This will also encounter another problem, we may find that "China", "bee", "culture" these three words appear as many times. Does this mean that, as a keyword, they are of the same importance? That's obviously

, Third, "Things to dilute for your", the rare and expensive explanation is: the thing because scarce and feel precious, some friends say the pure text link in a sense is not a chain, the chain common 2 kinds of forms: Anchor text link and plain text link, Baidu engineer Lee in Baidu Internet club said: Baidu will find plain text is a URL address and through the address to the corresponding URL to crawl, so plain text is a valid link, if the plain te

: Believe that concurrency is very rare, assuming bad luck encountered, give up and return information to tell it to try again. Because it is very rare to happen.Pessimistic lock Solution:　　Declare @count as int begin Tran Select @count=Count fromTb with(UPDLOCK)WAITFORDELAY'00:00:05' --analog concurrency, intentional delay of 5 seconds UpdateTbSet Count=@count-1Commit TranAn update lock is added to

concurrency is the overwhelming majority, and each thread must achieve the purpose. Optimistic Lock: Believe that concurrency is very rare, assuming bad luck encountered, give up and return information to tell it to try again. Because it is very rare to happen. Pessimistic lock Solution: 　　 1 2 3 4 5 6 7 declare@countasintbegintran select@count=countfrom tbWITH(UPDLOCK) 　　 WAITFOR D

purpose.Optimistic Lock: Believe that concurrency is very rare, assuming bad luck encountered, give up and return information to tell it to try again. Because it is very rare to happen.Pessimistic lock Solution:　　Declare @count as Intbegin tran select @count =count from TB with (UPDLOCK) WAITFOR delay ' 00:00:05 '--analog concurrency, deliberate delay of 5 seconds update TB Set [email Protected

. Fin_wait_2: Above has explained in detail this state, actually fin_wait_2 the socket in the state, indicates the half connection, also namely has the party request close connection, but also tells the other side, I temporarily also some data need to transmit to you, later closes the connection again. Time_wait: Said to receive the other side of the fin message, and sent out an ACK message, just wait for 2MSL to return to the closed usable state. If the fin_wait_1 state, received the other sid