apache myths

?-Gracefully Handle the case of intermittent network or disconnection. Finally, you need to consider how to present the page in the event of a network exception when developing the app. I don't know. Every time the network is out of the question, a dialog box pops up. And I'm definitely not going to pop a bunch of cue boxes when a series of network errors occur. I will try to tell the user that the app is processing the request, and if a problem occurs, the user can continue until the request is

. Cloneablewith Serializable an interface that is two tokens, no members are explicitly declared in both interfaces.The 26 interface is a completely abstract design and cannot be instantiated. newan excuse type created by the A method actually creates an anonymous class that implements the interface type.27 If the two interfaces declare the same variable x, a compile error is generated by simple name access when an interface inherits both interfaces, or if a class implements both interfaces at t

, undefined for variables, properties, and methods.The object can be null only if it is defined, otherwise undefined.If we want to test whether an object exists, an error will be thrown when the object is not defined.How to use the error:if NULL typeof " undefined "The correct way is that we need to use TypeOf first to detect whether an object is defined:if (typeof"undefined"null1.12 Program block ScopeJavaScript does not create a new scope in each code block, and the scope of each code block is

with CHECKSUM option does not reveal corrupted pages in memory. This is because memory chips or Windows processes cause pages in memory to be corrupted and write back to disk after this. This causes the corrupted page to have a normal checksum, and only use DBCC CHECKDB to discover such errors. So, in the final analysis, you have to use DBCC CHECKDB frequently, and if you still have questions, see my previous article: CHECKDB from Every angle:consistency Checking Options for a VLDB。 Extended r

XML was quickly entered into the history stage in February 1998 when XML was approved by the consortium, known as "the technology that suddenly emerges". It is called the successor of HTML and is also known by some as the future lingua-hybrid of structured data exchange. As XML emerges from the gloom at the start of its consortium, it may be inevitable that the new data format will begin to produce the wrong concept as quickly as it attracts enthusiasts. In this column, I'll clarify some of the

Four myths about indexing using indexes: Effects of null values on indexes Let's do some test data first: Sql> CREATE table t (x int, y int); Table created Note that here I do a unique (federated) index of table T: Sql> Create unique index t_idx on T (x,y); Index created Sql> INSERT into T values (1,1); 1 row inserted Sql> INSERT into T values (1,null); 1 row inserted Sql> INSERT into T values (null,1); 1 row inserted S

\u4e00\uff09'>>> targetstr = Targetstr.lstrip (u")")>>>Targetstru'\u6c42\u6559python\u9ad8\u624b\uff1a\uff08\u4e00\uff09'>>>Printtargetstr for a Python master: (a)>>> targetstr = u"(1) Ask Python master: (a)">>>PrintTargetstr (1) Ask Python master: (a)>>>Targetstru'\uff081\uff09\u6c42\u6559python\u9ad8\u624b\uff1a\uff08\u4e00\uff09'>>> targetstr = Targetstr.lstrip (u")")>>>Targetstru'\uff081\uff09\u6c42\u6559python\u9ad8\u624b\uff1a\uff08\u4e00\uff09'>>>PrintTargetstr (1) Ask Python master: (a)I

high, the caching mechanism will be the least access to the data directly clear out. Or the server CPU is busy and the network is not good, causing the data to be saved to the cache server even if it is serialized.Also, for ASP., if you use the local memory cache, then there is a problem with the configuration of IIS (limitations on cache memory), and we have the opportunity to share this knowledge specifically for you.Therefore, every time when using the cache data, to determine whether there

There was a freemarker in front of me. I did not cherish, met the velocity I just remembered the lost beautiful ...Demand is the PC page click, Mobile Web click, app click Add to get total clicks show out:$article. hits+ $article. waphits+ $article. mobilehitsIdeal is very good, the reality of output is: Number+number+number a large string (like that year. When you use the Freemarker. Add and subtract operations directly on, and now ... ）It is said that you need to add a space on both sides of t

servers are processed in the order in which they are sent. So the server may receive a request to delete information, and the server actually receives the request to create the information. In a recent application development, we will fill in the serial number in all requests, the server side will have a queue to save the received request. If a request is not received in the middle of the sending pair of columns, the server does not process any requests after it, guaranteeing that the request c

We've been confirming the importance of responsive web pages for a long time now and it's time to focus on how to make good responsive web design. Let's take a look! While many people are talking about responsive web pages, not everyone knows what they are saying. A lot of the time you see some information on the Internet is also challenging your understanding of responsiveness.Sometimes a little snitch gives you constructive advice and helps your design develop in the right direction. But

the old IE6 but still elegantMobile support: Verify that the plugin is functioning properly in the mobile environment8 without jqueryNo, no, no. Why do you have to use it? Many times we may not have thought of this problem at all, the first thought may be with Jquey seems to be easy to achieve AH! This misunderstanding is really common, do you have a sharp knife cut to the end of the habit?9 using jquery to do server-side livejquery is too good, too strong, it seems that everything can be done

Market, and users will have a low rating for your app. 9. Developing iphone Apps for AndroidWhen you download a cool app on your brand new Android device, it looks and behaves exactly like a typical iOS app. Not Cool. The Android platform has its own look and behavior, and users do not expect them to buy Android devices to install apps like other platforms. These same apps are often missing widgets, content providers and other unique features of Android (see # #), which makes them even more ou

header fields Headervalues Ibid., return string[] array. Note: If there is "-" in the head, example accept-encoding, headervalues["accept-encoding"] Cookies Represents a map object that holds all cookies Initparam Represents a map object that holds all the Web application initialization parameters Attention:①: If the value is placed in the domain object can be obtained by ${requestscope.key}, or you can omit requestscope that is

type, the other is the wrapper class reference type, the reference type is disassembled into the base data type, and then the values of the two base data types are compared for equality.27 in Java, an array is also a class, and the reference variable for an array declaration points to an object of the array type. All arrays inherit the class and are Object implemented with the java.lang.Cloneable java.io.Serializable interface. The members of an array include variables length (implicitly presen

Oracle Performance Myths--mts,rac, partitioning, parallel queries To improve performance, we've done a lot of testing on the methods or scenarios that the Oracle database itself providesMainly include:Shared server mode (MTS)Cluster technology (clustering), RACPartitionParallel processing (mainly parallel queries) These features provided by Oracle are indeed used for performance improvements, but we tend to overlook the analysis of our own applicatio

Relevance Consulting's Stuart Halloway recently wrote a series of blog posts about the "Ruby vs. Java Geek talk". The inspiration for this series comes from his recent experience with a zero-start, previously constrained Ruby project that has been reversed to a full-fledged Java project. In the course of the project which lasted many days, Halloway explored the following "Mistaken ideas": 　　One of the myths: Ruby works for small projects, and Java is

Java's performance has some kind of black magic claim. Part of the reason is that the Java platform is very complex and in many cases difficult to locate. Yet there is a tendency in history to study Java performance by wisdom and experience, rather than by applying statistics and empirical reasoning. In this article, I would like to debunk some of the most absurd technology myths. 1.Java is slow. There are many fallacies about the performance of Jav

used phrase to describe such things ) and that overnight mastery of the relevant material is possible. Even in the WEB 2.0 space, if the application programmers is not to go crazy, more of the the burden have to is taken up by th E Designers of the NoSQL systems. A case-in-point was how the Facebook messaging system designers decided eventual consistency semantics was too painful to de Al with. To begin with, if the NoSQL systems has vague semantics of what they support and subsequently, as the

What exactly is Ajax? is a method that is not too easy to master, but can increase the interactivity of the website? is the cornerstone of Web2.0? or another round of network development in the bandwagon? Just like the previously popular flashing fonts, splash pages, and the use of rounded corners, but this dynamic more powerful? Let's take a look at some of the myths about Ajax, and dig through the mist and uncover the truth. Myth One: AJAX is the