Data cleaning using poi
1. Data cleaning
1.1. What is data cleansing
Data cleaning – the process of re examining and verifying data to remove duplicate information, correct existing errors, and provide data consistency.
From the name of data cleaning, we can see that it is to "wash away" the "dirty", which refers to the last procedure ...
Added by Chamza on Fri, 18 Feb 2022 15:30:10 +0200
[Nginx things] description of Nginx configuration file
Profile path
cd /usr/local/nginx/conf
cat nginx.conf
The default configuration is as follows
#user nobody;
worker_processes 1;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
worker_connections 1024;
}
http {
include mime.types; ...
Added by Humpty on Fri, 18 Feb 2022 15:23:29 +0200
General review of Spring framework
Spring framework
1: Frame
idea:
Making the existing technology easier to use is itself a hodgepodge, integrating the existing technology framework
:SSM :
SpringMVC +Spring +MyBatis
1.spring configuration file
1.1: jar package dependency
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" ...
Added by Gayathri on Fri, 18 Feb 2022 15:02:12 +0200
DOM events advanced
DOM events advanced
Registration event
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
...
Added by jcanker on Fri, 18 Feb 2022 14:50:09 +0200
Node.js source code analysis - start with the main function
title: Node.js source code analysis - start with the main functiondate: 2018-11-27 21:30:15tags:- Node.js
- Node.js Source code analysis
- Source code analysiscategories:- Node.js Source code analysis
This article was first published on the personal website four years ago, and is now migrated to this site for re posting. The original link is: h ...
Added by GaryE on Fri, 18 Feb 2022 14:38:17 +0200
Spring series 15: Environment abstraction
Python wechat ordering applet course video
https://edu.csdn.net/course/detail/36074
Python actual combat quantitative transaction financial management system
https://edu.csdn.net/course/detail/35475
Content of this article
Two important concepts of Environment abstraction@Use of Profile@Use of PropertySource
Two important concepts of Envi ...
Added by joshgarrod on Fri, 18 Feb 2022 14:28:06 +0200
This is how Spring Security filters should be configured
CaptchaAuthenticationFilter this verification code filter is implemented by imitating UsernamePasswordAuthenticationFilter. Similarly, since the configuration of UsernamePasswordAuthenticationFilter is completed by FormLoginConfigurer, it should also be able to imitate FormLoginConfigurer and write a configuration class CaptchaAuthenticationFil ...
Added by Rabioza123 on Fri, 18 Feb 2022 14:19:40 +0200
[ybt gold medal navigation 2-1-3] [Luogu p4555] longest double palindrome string (two methods)
Longest double palindrome string
Title Link: ybt gold navigation 2-1-3 / luogu P4555
General idea of the topic
Give you a string and ask you to find the longest substring so that it is composed of two palindrome strings.
thinking
First, let's see the palindrome string. Let's run a Manacher first.
Then we'll think about what to do. First, ...
Added by Ward on Fri, 18 Feb 2022 14:17:09 +0200
A piece of code was refactored six times by the boss, and my mentality collapsed
preface
Hi, Hello, I'm Milo. I'm back 🙈
Come in and gossip for everyone and see what I've done myself? Recently, the company received a new project of agricultural products trading website. Because of a code reconstruction problem, it almost got into trouble with the boss. I thought it was the boss who deliberately made trouble for me. ...
Added by QbertsBrother on Fri, 18 Feb 2022 14:11:07 +0200
Design of API framework for modular development based on Gin
1, Introduction to gin project
The gin framework is very simple for people who write go language. It is a bit similar to the flash framework in python. You need to find a third-party package for everything, and then create a directory structure according to your own experience. For people without project experience, it is really not as good as ...
Added by alpinec on Fri, 18 Feb 2022 14:08:56 +0200