C Code If Statement

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C #. NET Learning Experience Summary

1. Boxing, unpacking or aliases many of the introduction of C #. NET learning experience books on the introduction of the int-> Int32 is a boxing process, the reverse is the process of unpacking. This is true of many other variable types, such as short <-> int16,long <->int64. For the average programmer, it is not necessary to understand this process, because these boxes and unboxing actions can be automatically completed, do not need to write code to intervene. But we need to remember that ...

The complete collection of SQL statement operations is worth permanent collections

The complete collection of SQL statement operations deserves to be permanently stored the following statements are part of the MSSQL statement and are not available in Access. SQL classification: ddl-data Definition language (create,alter,drop,declare) dml-Data Manipulation Language (Select,delete,update,insert) dcl-Data Control Language (Grant,revoke, Commit,rollback first, briefly introduce the basic statement: 1, Description: Create number ...

MySQL database statement optimization principles

1, use the index to traverse the table faster. The index created by default is a non-clustered index, but sometimes it is not optimal. Under non-clustered indexes, the data is physically stored on the data page. Reasonable index design should be based on the analysis and prediction of various inquiries. In general: a. There are a large number of duplicate values, and often range query (>, <,> =, <=) and order by, group by occurred columns, consider the establishment of cluster index; Column, and each column contains duplicate values ​​can be ...

MySQL statement optimization principles

1, use the index to traverse the table faster. The index created by default is a non-clustered index, but sometimes it is not optimal. Under non-clustered indexes, the data is physically stored on the data page. Reasonable index design should be based on the analysis and prediction of various inquiries. In general: a. A large number of duplicate values, and often range query (>, <,> =, <=) and order by, group by occurred column, consider the establishment of cluster index; b. Column, ...

How to use the site source code rapid build station

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest Cloud host Technology Hall Guide: Use the website source to build station can be said to be the quickest and most economical construction station way among all stations.   Considering that a lot of friends on the site is not so familiar with the construction, so, Huaxia Network Marketing Network here to say how to use the site source code rapid construction Station.   Dear friend: Good morning! Huaxia ...

Do not invoke WCF services in the using statement

If you call a WCF service, you need to be aware of a problem if you invoke it in the using statement like the following code. using (cnblogswcfclient client = new Cnblogswcfclient ()) {client. Dour ("Hello, cnblogs.com!"); The above code looks fine, Cnblogswcfclient is an automatically generated WCF client ...

C # int challenges Java integer

This article covers some JVM principles and Java bytecode Directives, recommend interested readers to read a classic book on the JVM, Deep Java Virtual Machine (2nd edition), and compare it with the IL assembly directives I described in ". NET 4.0 object-oriented Programming". Believe that readers will have some inspiration.   It is one of the most effective learning methods to compare the similarities and differences of two similar things carefully. In the future, I will also release other articles on personal blog, hoping to help readers of the book broaden their horizons, inspire thinking, we discuss technology together ...

If it was me, how would I judge a valuable article?

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall a lot of people asked me, said Mr.zhao Ah, Baidu how to judge false original and original? What kind of article does Baidu like? What kind of articles are compared such as getting a long tail word rank? and so on. In the face of these problems, I often do not know how to answer. If I give a more general answer, such as ...

If the customer can't find the page you show to the customer what 404 pages

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host Technology Hall 404 page Reference http://www.dangdang.com/404 (Dangdang http://www.360buy.com/404 (Jingdong Mall) http://www.paidai.com/404.

Today's Microsoft studies Release programming learning game Code Hunt

Abstract: The person who has learned to write code with Codecademy will know, codecademy in the side teaching time will give the practice task, do right to calculate clearance, mechanism and game very like. However, today's Microsoft studies released programming learning game Code Hunt is more exciting to use Codecademy to learn to write code people will know, codecademy in the side of teaching time will give the exercise task, do the right to calculate clearance, mechanism and game is very similar. However, today's Microsoft studies released the Programming learning game ...

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