Programmer Think

I wrote the IOC implementation of spring before, but now I write the implementation of DI dependency injection Paste class diagram Because junit package will be used when DI is implemented for testing, import dependency in pom.xml <!--SpringDI--> <dependency> &lt ...

Recently, I was looking at the hencoder custom view series of the throwing line. There is an icon turning the page and rotating the effect is cool. After thinking about it and seeing the thought of a great God, I finally made it. (GIF recorded a bit of card, the real effect can be run and viewed by yourself) thinking The w ...

1. Class is also an object In most programming languages, a class is a set of code snippets that describe how to generate an object. This is still true in Python: >>> class ObjectCreator(object): ... pass ... >>> my_object = ObjectCreator() >>> print my_object <__main__.ObjectCreator object at 0x8974f2c> ...

Process analysis With the help of TCP, the basic idea is as follows: The sender (client) sends the file name to the server, and the server saves the file name. The receiver (server) returns a message ok to the client to confirm that the file name is saved successfully. After receiving the message, the sender (client) begins to send the file da ...

The first native parsing method DOM When parsing XML documents, the parser will write the contents of the documents into memory. If the document nodes are added, deleted or modified, they must be used Transformer transformer = TransformerFactory.newInstance().newTransformer(); transformer.transform(new DOMSource(doc), new Str ...

In HTML, in the process of file upload, there are many cases where there is no prompt, which is very bad in the experience. Users don't know whether there is a successful upload or not, so the content introduced to you today is through HT for Web Vector to achieve HTML5 file upload progress bar, vector in< Application of embedding vector Cha ...

I. difference innerHTML Adding HTML code to the control is to set the HTML in an element. The tag is effective for text information. innerTEXT Print the plain text information between the labels, display the labels, the labels are invalid, and the lower version of Firefox does not support it. value Display all contents in ...

Demand: Ensure that the printing method is executed after all pictures are loaded successfully Implementation of final code: printMail = () => { this.btnDisplay='none'; //Get the window object of iframe let iframe = document.getElementsByClassName('wea-email-content-iframe')[0].contentWindow; let img_lengt ...

@ overview Some common operations of key value pairs and other data types are listed here; For more operation commands and definitions, please refer to: http://redis.cn/commands.html @String operation example set name bill //set key value setex name 20 bill //Key expires in 20 seconds mset age 60 gender male //Store multi ...

Atomicity of atomic, is it absolute thread safety, not absolute thread safety? First, look at the code and print results @property (atomic, assign) NSInteger intA; //There is an attribute of atomic, indicating that it is atomic - (void)viewDidLoad { [super viewDidLoad]; //Start the value of a thread to the intA + 1 ...