Programmer Think

Official documents: Java Transport Client (deprecated) [7.17] | Elastic 1. Create client (1)TransportClient The TransportClient client will be deprecated in ES version 7.0 and completely removed in version 8.0 Create steps: //Directly in http://127.0.0.1:9200/ You can see the cluster corresponding to es in_ name Settings settings= Settings ...

Python Trojan horse writing Problems encountered and Solutions Start with netcat Py file, which is prepared to imitate some kali tools net cat There was a problem. The code couldn't run out after writing, and the script couldn't be debugged with parameters. By adding print to correct the errors one by one, it was found that it was the blocki ...

Basic overview Introduction to mysql Deployment environment systemaddressCentOS Linux release 7.4.1708192.168.10.10/24 Experimental steps 1. Mysql download address: https://downloads.mysql.com/archives/community/ Download installation package: https://downloads.mysql.com/archives/get/p/23/file/mysql-5.6.20.tar.gz [root@localhost ~]# w ...

Recently, there was a demand that the customer wanted to add a drop-down refresh function. I see, this is not very simple. The SmartRefreshLayout control is introduced, and the layout can be written with a few swipes. This is the main layout: <?xml version="1.0" encoding="utf-8"?> <com.ggh.michat.widget.PagingRecyclerViewContainer xm ...

1. What is the difference between process and thread? Process is a program with certain independent functions. It is a running activity about a data set. It is the basic unit for the operating system to allocate resources. Process refers to an application running in the system, which is the execution process of a program,We can understand it ...

RocketMQ message store (III) - MappedFileQueue The previous article explained the MappedFile class. In fact, its bottom layer is to manage the reading and writing of files by zero copy through MappedByteBuffer. Since MappedFile is a class for managing individual files, there will be a class for managing these mappedfiles: MappedFileQueue. We c ...

Title portal Main idea of the title: Given an undirected graph G without self ring and mu lt iple edges, as well as the starting point and end point S and T, the edge weight is 1, find the path length from S to T < = the number of shortest path length + 1. Problem solving ideas Since the edge weight length is constant as 1, the shortest ...

What is Element UI Element, a set of desktop component library based on Vue 2.0 for developers, designers and product managers The Element # UI is based on Vue 2.0Element UI provides a set of componentsElement UI provides reference instances of components, which can be copied directlyOfficial website: https://element.eleme.cn/#/zh-CN/compon ...

subject Please implement a myAtoi(string s) function to convert the string into a 32-bit signed integer (similar to the atoi function in C/C + +). The algorithm of the function myAtoi(string s) is as follows: Read in the string and discard useless leading spacesCheck whether the next character (assuming it is not at the end of the character) ...

Knowledge points if judgment statement Topic 1 (training) Li Lei wants to buy a new mobile phone with a value of 7988 yuan. Her old mobile phone can sell for 1500 yuan in the second-hand market, and the mobile phone store offers the discount of exchanging the old for the new. If she gives her old mobile phone to the store, the new mobile pho ...