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learn the MFC process by writing a Serial port helper toolBecause it has been done several times MFC programming, each time the project is completed, MFC basic operation is clear, but too long time no longer contact with MFC project, again do MFC project, but also from the beginning familiar. This time by doing a serial assistant once again familiar with MFC, and made a record, in order to facilitate later access. The process of doing more is encountered problems directly Baidu and Google search

Parameter checking is necessary for a robust program, so how to verify the parameters is simple and intuitive. Assuming that there is a user object, we need to make a non-null check on the username password publicclass User { private String uname; private String passwd; } Common Verification Logic writing if (nullnull != user.getPasswd()) returntrue;returnfalse;This code really works and fits our needs, but

Transferred from: Http://ticktick.blog.51cto.com/823160/305471 I have been working on an embedded system and drawing a schematic diagram recently. Finally, in order to ensure the accuracy of the schematic diagram, it took me nearly two weeks to check the schematic diagram. Here, I would like to summarize my experience in checking the schematic diagram for your reference, you are welcome to point out something wrong. After we draw the circuit schemati

　 Function overload and type check A common feature of other object-oriented languages (such as Java) is the ability to "overload" functions: pass them to different numbers or types of parameters, and the functions perform different operations. Although this capability is not directly available in JavaScript, the provision of some tools makes this exploration completely possible.Each function in JavaScript contains a context-related variable named ar

Recently in the preparation of a book management program, need to check the book ISBN correct, check some information, understand the book ISBN code composition, detailed information can refer to: ISBN-wikipedia, below or briefly what is the ISBN code: ISBN (International Standard book NUMBER,ISBN, Is-ben), is the international general books or independent publications (except periodical published periodic

Recently in refactoring the old project code, found that the check-in parameter occupies a lot of code, before I know this piece of knowledge is limited to using stringutils and other tools to judge multiple if blocks, the code is not a problem, but always write these annoying, after all, write code to pay attention to elegance, So I studied the Java EE Api on the check class, basically overturned my previo

Label:Here is the description of the Oracle constraint in the OCP exam guide: The constraint types supported by the Oracle database is as follows:UNIQUENot NULLPRIMARY KEYFOREIGN KEYCHECKConstraints has names. It is good practice to specify the names with a standard naming convention, but if they was not explicitly named, Oracle W ill generate names. From the above, each constraint has a name, the best practice is to define the constraint is an explicit name, if not explicitly named, then the sy

occurs, but you know how to use the corresponding create table statement to regenerate the TABLE, you can regenerate a new one. frm files are used together with your data files and index files (if there is a problem with the index file, use the above method to recreate a new one. Create a copy of the data and index file, and then delete the original file (delete all records related to the table in the data directory ).Start MySQL and use the original create table file to CREATE a new TABLE. The

name for a class and façade). Using the gate class (injecting or using gate façade) allows us to easily check whether a user (the current logged-on user or a specified user) is allowed to manipulate certain things. Check the code as follows: if (Gate::d enies (' Update-post ', $post)) {Abort (403);}Putting this code in the controller will use a well-defined rule update-post to

MySQL log file in the following error, the MySQL table usually does not occur crash situation, generally in the database when the MySQL stop will cause. CHECK table Syntax CHECK TABLE Tbl_name[,tbl_name] ... [option] ...option= {QUICK | FAST | MEDIUM | EXTENDED | CHANGED} Check if one or more tables have errors. CHECK