Programmer Group

1. General representation 1. Presentation method - < form action = "jump path" name = "form name" method = "jump request method" > be careful: ① Path representation Absolute path: search from the drive letter until the file is found, path + file name Relative path: the relative path between the current ...

CountDownLatch The countDownLatch class enables a thread to wait for other threads to execute after their own execution. It is implemented through a counter. The initial value of the counter is the number of threads. Usage of CountDownLatch Typical usage of CountDownLatch: 1. A thread waits for n threads to complete execution before running. ...

Basic knowledge learning 🌟 The difference between topic and service -topic of conversationserviceSynchronizationasynchronoussynchronizationcommunication model Publish / subscribeServer / clientUnderlying protocolROSTCP/ROSUDPROSTCP/ROSUDPfeedback mechanismnothinghavebufferhavenothingReal timeweakstrongNode relationshipMany to manyOne to ...

1 Introduction      Flowable Official website address: https://flowable.com/open - source/      Flowable The project provides a series of compact and efficient open source business process engines. They provide a workflow and business process management (BPM) for developers, system administrators, and business users )Platform. ...

Operator arithmetic operator + plus-reduce*ride/except%Remainder (operand must be an integer) Arithmetic conversion: char -> int -> float -> double Shift operators Data storage: binary complement <<Shift left (discard on the left and fill zero on the right)>> Shift right (1) logical shift: fill zero on the lef ...

House price forecast Original question: https://www.kaggle.com/c/house-prices-advanced-regression-techniques/data?select=train.csv reference resources: https://blog.csdn.net/qq_29153321/article/details/103967670 The house price prediction experiment analyzes 1460 house price data and the attributes of 80 houses, establishes a regression mode ...

      Give two trees T1 and T2. If T1 can be changed into T2 by several times, we call the two trees "isomorphic". For example, the two trees given in Figure 1 are isomorphic, because we exchange the left and right children of nodes A, B and G of one tree to get the other tree. Figure 2 is not isomorphic. ...

1. Introduce pom dependency Because almost all web projects use the interceptor, the interceptor object introduced into the next web package is also in the web packagethymeleaf: view the static interface; <!--introduce springboot Parent project dependency--> <!--Introduce dependency: It can be omitted version Ta ...

preface Do you really know about decorators? I believe that developers who have used decorators must love some of its features. Both react, vue and angular can be supported through babel. Of course, there are some encapsulated third-party decorator libraries, which can realize some powerful functions after reference. Let's have a brief look. ...

1. What is JSP? JSP, the full name of Java Server Pages, is a dynamic web page development technology. It uses JSP tags to insert Java code into HTML web pages. Labels usually start with <% and end with% >. JSP is a Java servlet, which is mainly used to realize the user interface part of Java web application. Web developers write JSPS b ...