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ArticleDirectory [Obj-C note] "Self = [Super init]" explanation and hidden bugs [Obj-C note] "Self = [Super init]" explanation and hidden bugs The recommended init Method for objective-C is written as follows: -(ID) Init {If (Self = [Super init]) {// Add attributes to the subclass for initialization} return self ;} Several questions are involved here, 1. [Super init: Object orientation

Microsoft has a series of testing and evaluation mechanisms and software error return mechanisms. Ubuntu will also launch the crowd's power to catch bugs in the 5-A-Day program, of course, no one gives five Ubuntu bugs every day. It seems that the difficulty factor is too high, but for developers and users, reporting as many bugs as possible helps improve Ubuntu.

1. Familiar with the company's product business as soon as possible For example, your company to do ERP software, you must be quickly familiar with the EPR business process, for example, your company is a court software, then you must be familiar with the court case process, only familiar with the product business process, you can quickly find out some important defects in the software, The software flaw you find is valuable. Otherwise, even if you can find some software defects, it is pure soft

float p3x = 80838.0f;float p2y = -2499.0f;Double v321 = p3x * P2Y;Console.WriteLine (v321); Very simple, immediately written calculation The result is-202014162, no problem, C # did not produce such a result? It's impossible, open the Visualstudio,copy code to try, sure enough, the result is 202014162. Is this all over? Apparently not! You change the compile-time option from anycpu to x64 try it ~ (server environment is 64 drops Oh!!) It turns out to

First of all, this article is not a hands-on teaching you to use Percona Xtrabackup, you can refer to my entry level article http://blog.csdn.net/zhu19774279/article/details/41693267, you can also search or read the official manual. I've been trying to use the Percona xtrabackup compression feature and the ability to send it to a remote host today, but it's always "failed" and it's time to get off work and find out where the problem is. Altogether two

, corresponding to the/user/xxx on HDFs, my/user/root, because XXX users do not have write access to the Hadoop directory, So the occurrence of the exception is caused. The workaround is to: Release the permissions for the Hadoop directory by two methods: (1) Execute the following command $ Hadoop fs-chmod 777/user/root (2) Modifying the Hadoop configuration Modify the configuration file for Hadoop: Conf/hdfs-core.xml, locate the configuration entry for dfs.permissions, and change the value to F

relevant library. 2. Choose the wrong compilation platform. (Buildsetting inside platform) error prompt: Could not start compilationwin32exception:applicationname= "Xxxx\mono.exe",......Solution: Reload Unity3d.6. Memory Resource Load Error issue Error Hint: Trying to reload asset from disk, which is not stored on disk personal is when loading multiple assetbundle, after releasing the Mirror, the following bug has occurred. This warning doesn't have any effect on the game process, but it's anno

temporarily joins several global tag variables, changing the values of variables in many places, using the values of variables in many places Do not consider the changeable scene, not real-time fault tolerance, let him follow the trajectory of your brain to run Distribute different versions of code everywhere, without organizing unified documents If these plans are not enough for you to dig a hole, I think your team of students of the technical level is really too high.Many times,

Member Blog Address:Practice SimingChowa: http://www.cnblogs.com/luoliuxi/HO: http://www.cnblogs.com/40heyuming/Advantages of Mathsapp:1. The interface design is still more suitable for pupils2. Animation and sound design comparison can make people interested in softwareDisadvantages:1. I think it is more, first of all, the topic design, the spacing between the numbers is too tight, time is long, it feels very laborious2. Relatively single, the first

is called. NET project, you also need to set its target platform properties exactly the same as the platform on which the unmanaged DLL is running. The unmanaged DLLs that are typically left behind are x86 based, so that the unmanaged DLLs are invoked. NET project, set its target platform property to "X86". You can find this setting according to the project-> properties-> build-> target platform: 2, unable to load DLL, could not find the specified module The run called unmanaged.

Beijing Time July 2 News, the jquery Mobile development team officially published on its official blog jquery Mobile 1.4, 3, and this time from the JQM 1.4.0 official version of the release has been over the past 6 months. More than 50 bug fixes from 1.4.1 to 1.4.2 with more than 30 bug fixes, including Android 2.3 and IE8 issues, as a third maintenance version of JQM 1.4, in addition to continuing bug and performance optimizations, JQM 1.4.3 also includes a new Pagecontainer event demo. The m

JS Bug type: uncaught typeerror:cannot set/read property ' xxx ' of NULL This error is more likely to occur when doing DOM operations, such as: 1. document.getElementById (' test1 '). style.display= ' None ' 2. document.getElementById (' test1 '). Onclick=function () {*/* Related code */} If the DOM does not have this Test1 object, will throw the above error, after this error, the module behind the code will lose its effect, this is a more painful place. Resolving this bug can be eliminated

contexts is not logically affected. Only through field trials. After the GDB trace, it is found that after using the error-porting character, the opcode of the function call is different: Copy Code code as follows: When the error suppressor is not used OPCODE = Send_ref After using the error suppression symbol OPCODE = Send_var_no_re The problem is initially fixed, but what is the cause of this discrepancy? Since opcode is different, then certainly is in the gramm

The order data in the ecshop background is not statistically correct, and the problem is defined in the order_status.php file function get_orderinfo ($start _date, $end _date), where all of the SQL uses the following code: function Get_orderinfo ($start _date, $end _date){$order _info = Array (); /* Not confirmed order number * *$sql = ' SELECT COUNT (*) as Unconfirmed_num from '. $GLOBALS [' ECS ']->table (' Order_info ')."WHERE order_status = '".

First step: Build Git WarehouseCD to your local project root directory, execute git command Git init11 Step Two: Add all the files from the project to the warehouse git Add. 11 If you want to add a particular file, just replace it with a specific file name. Step three: Commit the Add file to the warehouse git commit-m "comment statement" 11 Fourth step: To create your own repository on the GitHub, create the page as shown in the following image: Cl