cdr traps

Be careful when using the WCF + Entity Framework. Otherwise,EasyFall into various traps. This section describes two problems that are easily encountered during serializationService stopped. 1. The service is stopped by trying to serialize the entity proxy class. Ii. Service stops due to an endless loop during serialization; No matter which trap you fallClientThe following dialog box is displayed (click to view the large image ): Er ~ Thi

not worry about being modified during execution, which means that we can deduce that any non-multi-step operation is successful. (the method does not contain a remote method and is bound to succeed)2. Thread switching mechanism to ensure that we run the correct location when writing code, because you do not need to determine whether remote execution, only through the proxy call.3. Unless the transaction, to ensure that the operation of the parties must be successful, otherwise, no lock, that is

When you see that Baidu has the image verification Mark, do not submit an application !! The free trusted website certification is a third-party Baidu application provided by Beilong Zhongwang. after submitting an application, you will find that the website has been K, followed by the sales staff of Beijing Longzhong. When you see that Baidu has the image verification Mark, do not submit an application !! The free trusted website certification is a third-party Baidu application provided by Be

, resulting in the last sign of the property value.Second, consider avoiding the loop, using the function to implement, but this will still be affected by the asynchronous programming, because when the results are still all completed two functions to determine whether username exist, from the Payhist1payhist2 table after the data is taken out, Then the second Getsistype function, and this is the last Payhist table, the judgment of sign is only the last table corresponding, so also can not be imp

;Carmen eats the second litter she receives, extending her life from 10 hours to 13 hours;Carmen piled up a 3rd litter, height=19;Carmen piled up a 4th litter, height=20.Category labelsTags Click here to expandNo labelAC code + Explanation:/*first, according to the time of garbage disposal; F[i] indicates that the heap of garbage height is the longest time to live in Carmen, and each time the judging condition is whether the time to survive is greater than the time of the garbage, if not Carmen

"// The x in foo is accessed only because of the closure.Alert ('Call to f (): '+ f (); // "2"Javascript closure traps and CasesIn many cases, because the internal function variables overwrite the closure variables, if we need to reference a variable with the same name as an external function, we need to execute an anonymous function, variables without external functions are passed in as parameters. As follows:(Function (out_xxx ){// You can use out_x

The computer reports millions of lattice traps inside the story. The purpose of this article is not to belittle the major subnets, but to waste your valuable promotional money on the webmasters.When money is used in appropriate places, such as Google, Baidu, and exchange links, the author will definitely keep a fair comment to write.Let's briefly introduce the million-dollar grid: milliondollarhomepage.com, a 21-year-old English student named Alex.I d

In recent projects, we have encountered some "inexplicable" errors caused by uncoding (transcoding) When URL parameters are passed, so as to avoid detours like me. We know that a web project always has to pass parameters like a http://www.google.cn/search? Hl = ZH-CN Q = % E5 % 95% 8A, which includes two parameters, HL and Q, and Q is encoded ("ah" in Chinese "). But in projects, when we pass parameters, we forget to encode (decode, transcode) the parameters. What kind of

has only one parameter. The value of this parameter is the value of the comma operator in parentheses. Note: In C, the order in which all other operators evaluate their operands is undefined. In particular, the value assignment operator does not guarantee any order of value. If you use the same variable for multiple times in an expression, the Operation consequences such as ++ or -- are sometimes unpredictable. For example: Y [I] = x [I ++]; 9. The result of a logical operator is a logical val

This is the first summer vacation of the university. I want to study hard this summer and review the knowledge of the previous two semesters. Therefore, I decided to read "C traps and defects" again. this is indeed a very good book. I think it is one of the books that students must read. The following are my reading notes that will be constantly updated, I hope it will be helpful for learning C. Chapter 1 1.It doesn't make sense to isolate a single

of images in a lightbox window. You should never use the following code. Here we use jQuery as an example. HTML: ....... Javascript (not recommended ): $ ('A'). on ('click', function (){ CallLightbox (this ); }); This will cause binding events to every link element. It is best to bind events to the specified image container, as shown below: $ ("# Grid-container"). on ("click", "a", function (event ){ CallLightbox(event.tar get ); }); Online debugging Avoid redundancy comp

MySQL database is an open source database based on structured data. SQL statements are the core language of MySQL databases. However, when executing SQL statements in the MySQL database, you need to be careful with two traps. Trap 1: NULL values are not necessarily empty A null value is a special field. In MySQL databases, null values often have different meanings under different circumstances. This is a feature of the MySQL database. For example, in

Vue better-scroll rolling plug-in traps, vuebetter-scroll BetterScroll claims to be the best Mobile-side rolling plug-in currently, so its strength must exist. Or... haha. My personal feeling is still very useful. This article is not about BetterScroll in general, but about rolling. To learn more about it, please move here. Rolling Principle What is better-scroll?Rolling Principle Better-scroll is a plug-in that focuses on mobile terminals (PCs alrea

Traps of Parallel Streams in Java 8 [translation], java8streams : Simplified text and free text links: Java Parallel Streams Are Bad for Your Health!Java 8 provides three important functions that we desire: Lambdas, Stream API, and default Interface methods. However, we can easily abuse them and even destroy our own code.Today, let's take a look at Stream APIs, especially parallel streams. This article outlines the traps.But first let's take a look at

BigDecimal precise calculation and traps BigDecimal is usually used when accurate computation is involved. The following is a summary of the incorrect use of BigDecimal. Conclusion: Initialize the BigDecimal variable: // BigDecimal initialize public static void testBigDecimalinit () {BigDecimal num1 = new BigDecimal (0.1); System. out. println ("Pit Point 1: num1 =" + num1); // pit Point 1: num1 = 0.1000000000000000055511151231257827021181583404541015