Programmer Group

I usually use C#, JavaScript and TypeScript. But recently, due to some reasons, I need to use Java and have to pick it up again. In retrospect, the last time you used java to write a complete application, java was version 1.4.Over the years, Java has indeed made many improvements, such as Stream and var. I still know some. But it still feels a ...

} } //If the tail node is null, enq is used to join the queue enq(node); return node; } //The synchronizer ensures the correct addition of nodes through an endless loop. After the node is set as the tail node through CAS in the "endless loop", //The current thread can only return from this method. Otherwise, the current thread ...

C++11 introduces the function std::thread join(), which is used to wait for a thread to complete its task. Let's take a step-by-step look at this function. In a simple program, only one thread is required, that is, the main thread: int main() { cout << "The main thread starts running\n"; } Now suppose I have to do a time-consuming ...

preface Although the code is often very long, it is annotation for understanding 1, KMeans KMeans can be said to be one of the simplest clustering algorithms 1.1 how does kmeans work Key concepts: cluster and centroid KMeans algorithm divides the characteristic matrix X of a group of N samples into K clusters without inters ...

catalogue 1, GFS overview 1. File system composition 2. File system role 3. File system components 4. GFS features 5. Working principle 2, GFS volume 1. GFS volume type 2. Characteristics of the three basic volumes Distributed volume Strip roll Copy volume Distributed striped volume Distributed replication volume 3. Four server c ...

introduction The. properties file in Java is a configuration file, which is mainly used to express configuration information; Generally speaking, the stored data is like the corresponding relationship between key and value in Map; In this way, attributes can be matched through key value pairs, and each key and its corresponding value in the at ...

Chapter six: conversation and its conversation technology 1, Learn to master the overview of cookie objects and make 2, Master the Session object 3, HttpSession APL 4, Using URL rewriting to realize Session tracking 5, Summary 1, Foreword 1. Session overview: In daily life, the series of questions and answers you ask me from dialing ...

1. What is object-oriented (1) Process oriented & object oriented Process oriented thinking: the steps are clear and simple, which is suitable for dealing with some relatively simple problems (linear thinking) Object oriented thinking: birds of a feather flock together and classify; Suitable for dealing with complex problems and problems r ...

Tool link: Curve-Text-Detector/data at master · Yuliang-Liu/Curve-Text-Detector · GitHub catalogue preface 1, Tool introduction 1. Label format 2. Use of tools 2, To label 1. Data preparation 2. Data annotation 3. Dataset label visualization summary preface The annotation methods and tools introduced this time are the ...

How to customize? The Helper holds a reference to the view, so you can get the view (getViews) and then operate the viewcallback before and after onLayout (updateprelay / updateprelay) is providedThe Helper inherits the view, so the Helper itself is also a view CircularRevealHelper [the external chain picture transfer fails. The source stati ...