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MongoDB Installation and Startup 1. Installation 1.1 windows Edition click https://www.mongodb.com/download-center?jmp=nav#community Download the msi file on the mongodb official website. Double-click to run it. There is nothing to explain. 1.2 Linux Edition curl -O https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.4.3.tgz # ...

I. Top 3000 Personnel List Pages 1) Go to the home page and find the blog Park score list. Here's the picture: Then we found the blog addresses of the top 3,000 gods. Through the analysis of word cloud, many Dashen's blogs have migrated to personal blogs. 2) Analyse the page structure: every td is a person. The first small is ranked The s ...

Interpretation of redis command Say Redis Distributed locks are implemented by combining setNx commands with getset. Before we talk about them, let's first understand the meaning of setNx and getset. redis The official website explains this. Note: redis commands are atomic operations SETNX key value Set the value of the key to value if and ...

Docker is often used to simulate the deployment of a project in a production environment. It often requires several Docker containers to be opened at the same time. Sometimes the installed software needs to bind to other containers in the Docker LAN, such as the intranet IP of other containers when deploying the MongoDB replica set. However, ev ...

Previous remarks Mongoose is an object model tool that can operate mongodb conveniently under node.js asynchronous environment. This article describes in detail how to use Mongoose to operate MongoDB   NodeJS Driver Before introducing Mongoose, I first introduce how to operate MongoDB using NodeJS If you use a program to operate a database ...

(iv) Focus on Wechat Public Number: [Taro Back-end Cabin] Welfare: RocketMQ/MyCAT/Sharing-JDBC All Source Analysis Articles List RocketMQ/MyCAT/Sharing-JDBC Chinese Annotation Source GitHub Address Every message you leave about the source code will be answered carefully. Even if you don't know how to read the source code, you can ask. New so ...

There is nothing more necessary than to go through the official documents before we begin: http://mongoosejs.com/ What is mongoose? What's the use?mongoose is an object model library for manipulating MongoDB; it encapsulates the common methods of document manipulation (add, delete and check) in MongoDB, which makes NodeJS operate Mongodb databa ...

First, we need to understand that JS is a weakly typed and dynamically typed language. Weak type means that you can make some implicit transformations, such as []= 0 is true, but strong type is not. Dynamic typing is to detect typing only when the code is running, such as a = 3; a.push(3); the result is runtime error, while static typing is ...

The maven project is used here, so dependencies on jar packages are all pom.xml configuration types. pom.xml introduces dependencies <properties> <spring.version>4.3.5.RELEASE</spring.version> </properties> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spr ...

This post explains Collations in three ways.This includes an overview, how to use it, and operations that support sorting.Let's start with an overview of sorting rulesOverview of Collation   Sorting rules provide a set of rules for string comparison in specific language habits. For example, in Canadian French, the last syllable of a g ...