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Inherit Mapper's generics public class WCMapper extends Mapper<LongWritable, Text, Text, LongWritable> Longwritable - > start offset Text - > entered text Text - > output text Longwritable - > count Of the four generics, the first two are the type of specified mapper input data, the key is the type of input key, ...

In another article published with this article, BlueDot, a company that uses artificial intelligence to protect people around the world from infectious diseases, warns one week in advance before the epidemic has received strong attention. How valuable is a week's time! Their AI early warning system uses in-depth learning to process text. This s ...

Single thread IP address resolution Article directory Single thread IP address resolution Target program Implementation ideas Implementation process Try the process in the console Design WPF interface Background code Knowledge required IP address port The class of IP address translation in C ා ...

I. objectives The APP monitors the status information of wifi connected to Android devices (mobile phones, TV or other devices) and uploads it to the server regularly to analyze the status and signal strength of wifi in the environment where the devices are located at a specific time point. 2, Use s ...

In the previous section, we talked about the network namespace of linux, created the veth, and then made the network of the two network namespaces interoperate. After the docker creates the container, it will be found that the external network can be accessed in the container, and the network between th ...

Using virtual nodes to improve k8s cluster capacity and flexibility The way of adding virtual nodes in kubernetes cluster has been widely used by many customers. Based on virtual nodes, the Pod capacity and flexibility of the cluster can be greatly improved, and ECI Pod can be created flexibly and dynamically on demand, avoiding the trouble ...

Original address: http://www.yiidian.com/springmvc/file-upload.html File upload is a common requirement in the presentation layer. In Spring MVC, the common file upload tool of Apache is used to complete file upload and encapsulate it, making it more convenient for developers to use. Let's see how to develop it? 1 import common file upload pack ...

Service concept: Virtual private network, in fact, is to open up a virtual private line in the network Application classification: 1. Host remote access * * * service 2. Services between enterprise networks 3. Services between IDC rooms of Internet companies Transmission data protocol mode: Establishmen ...

In the socket blocking mode, the connect function will not return until there is a clear result (or the connection succeeds or the connection fails). If the server address is "far away" and the connection speed is slow, the connect function may cause the program to block in the connect process ...

Article directory Preface Import jQuery function library Rotation chart requirement analysis Realization css html Development process html framework development Style development Dynamic page generation summary Preface Last article: Front end learning (3) - jQuery function library The last ...