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1. Download Android SDK( https://www.androiddevtools.cn/ )If you want to try Android development, you can download Android studio. If you want to be concise, you can download SDK tools. Download the Windows version of the official installer_r24.4.1-windows.exe. After installation, there will be two startup items: AVD manager and SDK manager. 2. ...

catalogue I C + + header file and namespace 1. Naming method of header file and source file 2. Inclusion method (1) When including self defined header files (2) When a standard library is included 3. Introduction of namespace (1) Create namespace (2) Role of namespace (3) Namespace access II Basic output input 1. Output 2. Input 3. ...

A center The center of   heap is dynamic extremum, which is indispensable. 1046. Weight of the last stone There is a pile of stones, and the weight of each stone is a positive integer. Each round, choose the two heaviest stones and crush them together. Suppose the weight of the stone is x and Y respectively, and x < = y. Then ...

catalogue generic paradigm Generic mechanism Characteristics of generics Generic class generic interface ArrayList ArrayList stores strings and iterates through them ArrayList stores custom objects and traverses them Unique functions of Vector Implementation of the unique function of Vector Unique features of LinkedList Implement ...

As long as more than half of the nodes in the zookeeper cluster are normal, the whole cluster is available to the outside world. Based on this feature, it is more appropriate to set the number of nodes of ZK cluster to an odd number (2n+1: such as 3, 5 and 7 nodes). Server 1: 192.168.1.81 port: 2181, 2881, 3881 Server 2: 192.168.1.82 port: 218 ...

catalogue The file structure in the project is as follows: 1. Start the turnle1 node and the keyboard operation node of turnle1, subscribe to the pose information of turnle1, and publish the coordinate information of turnle1 (getturnle1pose. CPP): 2. Start the turtle 2 node, subscribe to the pose information of the turtle 2, and publish the ...

Tip: This article has 6000 words, rough reading takes about 5 minutes and intensive reading takes about 30 minutes viewpoint This year's provincial tournament is a little different from the past. It pays more attention to mathematics, algorithms and ideas, and is a little closer to ACM. I believe this is a trend, and the future Blue Bri ...

1. Preface This paper mainly summarizes the threads and thread pools of Android. 2. Text 2.1 main thread and sub thread 2.1.1 what classes can play the role of thread in Android? Thread, AsyncTask, HandlerThread and IntentService. In Jetpack, a new WorkManager is added. classdescribepurposeAysncTaskEncapsulates the thread pool and H ...

Algorithm Introduction k-nearest neighbor method belongs to supervised learning and does not need training model (lazy learning). Algorithm flow: for the test samples, find k training samples from the given training set according to some distance measurement (Minkowski distance, Euclidean distance, Manhattan distance, Chebyshev distance, e ...

What is GoAccess GoAccess is an open source, real-time Web log analysis tool running under the command line terminal. The tool provides fast and diverse HTTP status statistics. The analysis results can be viewed through client tools such as XShell, and Html reports can be generated. GitHub address: https://github.com/allinurl/goaccess Offi ...