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**android:divider="#f00" * * color of split line android:dividerHeight = "2dp" the height of the splitter bar **android:cacheColorHint="#0fff" * * when the background image is used in the list, there will be a problem in the drop-down or pull-up: the background image is missing android:scrol ...

Step 1: configure multiple data sources I won't introduce the basics of Spring Boot. I recommend this practical tutorial: github.com/javastacks/... First, we configure two data sources in SpringBoot. The second data source is ro datasource: spring: datasource: jdbc-url: jdbc:mysql://localhost/test username: rw password: rw_ ...

public static void main(String[] args) throws InterruptedException { Thread t1 = new Thread(()->{ while (true) { if (Thread.currentThread().isInterrupted()) { System.out.println("Interrupt!"); break; } ...

long startTime = System.currentTimeMillis(); Throwable failureCause = null; doService(request, response); } > get into`doService`method > > Class: org.springframework.web.servlet.`DispatcherServlet` ```java protected void doService(HttpServletRequest request, HttpServletResponse response) throws Exception { logRequest(reques ...

Relational structured storage has some disadvantages, because it needs to define all columns and their corresponding types in advance. However, in the process of business development, it may be necessary to expand the description function of a single column. At this time, if the JSON data type can be used well, the boundary between the storage ...

Select structureHello, welcome back. I'm Peng Peng! HAKUNA MATATA!!!On the basis of data and operation, there is a new demand: process control. Generally, the code execution process will not be executed in the end. Many times, the appropriate direction will be selected according to the changes of data, and even the running results of the progra ...

Syntax of Lambda expressions Basic syntax: (parameters) -> expression or (parameters) ->{ statements; } Copy code Method reference There are three kinds of method references. Method references are represented by a pair of double colons::. Method references are another writing method of functional interfaces Static method reference, ...

Summed up some commonly used JS tips to make your code more elegant! 1. Use const definition Don't over declare variables in development, and try to use expressions and chain calls. Then, if you can use ， const ， don't use ， let. After you write too much about this mode, you will find that you can hardly find several places to use &quo ...

from sklearn.model_selection import train_test_split #Divide 30% of the data as the test set Xtrain, Xtest, Ytrain, Ytest = train_test_split(wine.data, wine.target, test_size=0.3) clf = DecisionTreeClassifier(random_state=0) #Modeling: Decision Tree rfc = RandomForestClassifier(random_state=0) #Modeling: random forest clf = clf.fit( ...

JWT can be understood as an encrypted string, which consists of three parts: header, payload and signature It is used by the header and payload encrypted by base64 The JWT string is formed by connecting the strings, then encrypting them with salt secret combination through the encryption method declared in the header, and then forming the JWT ...