Programmer Group

In the Jpcap experiment, the running program always reported an error, the information is as follows: Error statement: jpcap = JpcapCaptor.openDevice(devices[0],caplen, promiscCheck,20); The result of getPacket() function execution has not been null, and no answer has been found on the Internet Finally, we found that it w ...

Using jQuery to implement Ajax JQuery encapsulates Ajax operations. In jQuery, the lowest level method is $. ajax(), the second level is load(),$.get(),$.post(), and the third level is $. getScript() and $. getJSON()   load() method: -- the load() method is the most simple and commonly used Ajax method in jQuery. It can load remote HTML cod ...

Preface What should we pay attention to when adding attributes in JSX and how do the child elements in JSX operate? The case problem of components, the use of extension operators, and how to cycle through an object What does prop s in JSX refer to and what should be paid attention to in the form's labe? Although the above questions are very c ...

Original: Guan Changlong   We have introduced six common segmentation algorithms of DBLE and MyCat through the previous six articles, so let's make a summary! DBLE and MyCat corresponding algorithm name and similarities and differences The seventh DBLE fragmentation algorithm jumpStringHash In addition to the above six common sharding ...

In JetPack, there is a component called Navigation. As the name implies, it is a page Navigation component. Compared with other third-party Navigation, the difference is that it is specially designed for Fragment page management. It is very useful for the App of a single Activity, because the presentation of App pages based on an Activity is d ...

Data is the fourth business card of an enterprise. Encrypted data transmission is indispensable in enterprise development. Therefore, this paper introduces the methods of interface data encryption and decryption in SpringBoot. Contents of this article I. Introduction to encryption schemeII. Implementation principleThree, actual combatFo ...

Here is a brief explanation of the type of unit imported image material Default: default map type for materials NormalMap: normal map. There is a kind of map specially used for normal map to display the details of the model. Editor: a picture of the UI such as the buttons used to customize components i ...

background Read the fueling source code! - by Lu Xun A picture is worth a thousand words. --By Golgi Explain: Kernel version: 4.14 ARM64 processor, Contex-A53, dual core Using tool: Source Insight 3.5, Visio 1. overview This paper will describe memory compaction, memory defragmentation technology. Memory fragments are divided into interna ...

I. why lazy loading Lazy loading means loading when needed. 1.1. Why does Fragment need lazy loading? Generally, we will start some data loading operations in onCreate() or onCreateView(), such as loading from local or server. In most cases, this will not cause any problems, but when you use ViewPager + Fragment, the problem will come. At this ...

Review the exception handling in Golang together. 1. There are no try...catch... Statements in other languages in golang to catch exceptions and recover exceptions. 2. In Golang, we usually use the panic keyword to throw exceptions. In defer, we use recover to catch exceptions for specific logical processing. 3. In golang, we usually return ...