python crawler combat + data analysis + data visualization

1. Summary After learning the python crawls (requests,bs4) and the numpy, pandas, matplotlib libraries, you want to try a small project grinder.Previously, it was only used unilaterally, such as crawling data about a website or analyzing data already given to it.This project strings these parts together.Those who have studied these ...

Posted on Mon, 06 Apr 2020 19:54:31 -0700 by DJ Judas

[Net] Front Hard Steel for ABP Framework Learning

Preface This paper introduces another method of learning ABP framework, which is the normal hard steel learning method. Instead of downloading the template on the official website, we use the DLL directly. WebApi Project Creation First, create a WebApi project, structured as follows. Nuget then searches for ABP and installs the ABP framework.( ...

Posted on Mon, 06 Apr 2020 19:49:38 -0700 by mapostel

Common design patterns in JAVA: single case, factory, observer

1. Singleton mode Only one instance object can be created per class The main purpose of the Java Singleton pattern is to ensure that only one instance of a Class class exists in a Java application.The advantage of using Singleton is that it also saves memory because it limits the number of instances and facilitates garbage collection for Java. ...

Posted on Mon, 06 Apr 2020 10:26:12 -0700 by bluemonster

Big Call Business Scenarios and Solutions - Tasks

background Most mobile APP s will have function modules to do tasks and receive rewards. The purpose of this kind of demand is to cultivate user usage habits, improve user activity, get credit reward for completing tasks, exchange goods or charge charges through credit, WeChat and so on. Draw up a requirement scenario (Fig.), outline: Add a sm ...

Posted on Mon, 06 Apr 2020 09:35:06 -0700 by Chef-Mars

Pgame Level Game Lipstick Challenge Game (Group)

Game Profile and Operations: 1. The game is divided into three levels, each level lasts 60 seconds. 2. The difficulty of the game increases at each level.(The wheel spins faster and faster, and the number of lipsticks increases) 3. Lipstick hits one, 10 points more. 4. The lipstick hits the repeating position and fails. Development Tools: ...

Posted on Mon, 06 Apr 2020 09:22:35 -0700 by Pie

Jquery Source Reading--Callbacks

1. Simplified allbacks //Simplified allbacks Jquery.Callbacks = function( options ){ //Processing incoming parameters options = ... //Declare some variables //Is the function in the list being callback var firing, //Parameters passed when the callback wa ...

Posted on Mon, 06 Apr 2020 09:20:14 -0700 by gilsontech

Openstack computing host installation and configuration process II

Openstack computing host installation and configuration process 1. Environment configuration Hosts configuration   modify the / etc/hosts file and add wtcontroller, wtcompute1 and wtcompute2: 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost ...

Posted on Mon, 06 Apr 2020 08:53:20 -0700 by Toboe

3597 problem f algorithm 2-25 delete duplicate elements in ordered single chain table

Problem F: algorithm 2-25 delete duplicate elements in ordered single chain table Time limit: 30 Sec memory limit: 128 MB Flower offering: 30 solution: 17 [flower offering] [wreath] [TK question bank] Title Description According to an increasing sequence of integers, an ordered single chain table is constructed, in ...

Posted on Mon, 06 Apr 2020 07:54:21 -0700 by DylanBlitz

Centos8 deployment elastic search 7.6.2 + kibana 7.6.2

Written in the front This article is an essay record of the author in setting up the ES learning environment. If it is for self-test, it can be carried out according to the content of the article. The following configuration should not be placed in the production environment. Server: alicloud ECS Operating system: Centos 8.0 64bit, install ...

Posted on Mon, 06 Apr 2020 07:12:08 -0700 by Bendude14

How are spring application objects built? SpringBoot source code

Note: the source code analysis corresponds to spring boot version 2.1.0.RELEASE This connection What is the starting process of SpringBoot? Spring boot source code (7) Learn from the past Let's review the contents of the previous article. In the previous article, we analyzed the startup process of SpringBoot, and now we summarize the key steps: ...

Posted on Mon, 06 Apr 2020 04:56:42 -0700 by isam4m