Node.js Implementing Simple Crawler

Why did you choose to use node to write crawlers? Just because cheerio is a library that is fully compatible with jQuery grammar, it's really cool to use if you're familiar with it. Dependent Choice cheerio Node.js version of jQuery Http: Encapsulates an HTPP server and a simple HTTP client iconv-lite To solve the problem of scrambling gb2312 ...

Posted on Wed, 17 Jul 2019 12:52:13 -0700 by jackiw

Introduction of quasi-real-time synchronization between Oracle and Hadoop cluster based on OGG

The structured data stored in Oracle is exported to Hadoop system for offline computing, which is a common data processing method. Recent scenarios need to do real-time import of Oracle to Hadoop system. Here is a case to introduce. As a commercial database solution, Oracle is difficult to acquire database transaction log spontaneously. Therefo ...

Posted on Wed, 17 Jul 2019 12:29:17 -0700 by ChaosXero

Oracle 12c Reading Notes (2): Oracle Database Architecture

  Analysis in 11g Database instances include: SGA and a series of background management, monitoring abbreviations The database contains three files: data file, control file, redo log file Database instances and databases are the core parts of Orale's database system   Oracle Server and Instance Example: consists of some in-memory and backgroun ...

Posted on Wed, 17 Jul 2019 10:30:23 -0700 by Jack_Slocum

Express+MongoDB Step by Step'Win'

prelude What is Express? Express is a minimalist and flexible web application development framework based on Node.js platform, which provides a series of powerful features to help you create a variety of Web and mobile applications. Global Installation express Scaffolding $ npm install express-generator -g Create express Project $ express myapp ...

Posted on Mon, 15 Jul 2019 17:33:50 -0700 by jubripley

Entity Framework Many-to-Many Mapping

In the previous article, we explained one-to-many relationship mapping in EF. In this article, we explained Many-to-Many Relationship mapping in EF.In this article, we will also use a simple example to illustrate Many-to-Many Relationship mapping. Zero. Automatically generate relationship tables Story: In a student selection system, there are ...

Posted on Mon, 15 Jul 2019 10:31:49 -0700 by compphenom

Linux man rpm cn translation

Translated for oneself Chinese: RPM RPM Name rpm - RPM package management outline Query and Verification Package: rpm {-q | - query} [Selection Options] [Query Items] ps: The options here are explained later. RPM {- V | - verify} [Selection Options] [Verification Items] RPM {- K | - c ...

Posted on Sun, 14 Jul 2019 11:12:24 -0700 by chinstroker

Redis Series (1) -- Installation, helloworld, and understanding of configuration files

Open a redis series, this series is not intended to elaborate on a series of naming (will recommend others to write, people write enough detail), I directly do redis program to provide, of course, at the beginning of helloworld and configuration files. It will be updated step by step. You are welcome to pay attention to it. Article structur ...

Posted on Sat, 13 Jul 2019 14:52:47 -0700 by Rhysyngsun

Configuration and simple use of Hibernate

1. Concepts Hibernate is an open source Object Relational Mapping (ORM) framework that encapsulates JDBC in a very lightweight object package, allowing Java programmers to ditch writing SQL statements in their programs and manipulate databases with their own object programming thinking. 2. Preparations Install the HibernateTools plug-in in Ecl ...

Posted on Sat, 13 Jul 2019 10:24:18 -0700 by acemods

Summary of Java Learning in the 2018-2019 School Year

First: Introduction to Java Introduction to Java Language: Java It's a door. Object-oriented Programming languages, not only absorb C++ The various advantages of language, but also discarded the difficult to understand in C++. Multiple Inheritance,Pointer As a result, the Java language has two characteristics: powerful and easy to use. The ch ...

Posted on Fri, 12 Jul 2019 15:48:44 -0700 by Elizabeth

Cassandra Cluster Management - Replacement of Exception Nodes

Cassandra Cluster Management - Replacement of Exception Nodes Replace the exception cluster node and start with the JVM startup flag Dcassandra.replace_address_first_boot= <dead_node_ip>. Once this property is enabled, the node will start in a dormant state, during which all other nodes will see the node closed. The replacement node will ...

Posted on Thu, 11 Jul 2019 13:24:55 -0700 by Bea