See you soon, why SHOW TABLE STATUS never updates

Did you tread a hole? 1. Problem Description 2. Problem Exploration 3. Summary 4. Extended Reading 1. Description of the problem A few days ago, the QQ group was discussing a delayed update of M ...

Posted on Sun, 07 Jun 2020 18:11:50 -0700 by TeamTJ

Stage 2 Lesson 16 JSP core technology

Course review The concept of JSP JSP execution process The relationship between JSP and Servlet Difference: there are three things about Servlet: ① get data ② call business methods ③ process control, and JSP focuses on data display. Contact: JSP is Servlet. JSP inherits HttpServlet. EL express ...

Posted on Fri, 05 Jun 2020 03:32:36 -0700 by stemp

Page single hop conversion module

1, Demand analysis 1. Get the taskid from the spark submit script submitted by the user and get the parameters of the task 2. Obtain the data within the specified date range for calculation, and obtain the page slice flow to calculate the conversion ratio of visits between pages. Like targe tPageFlow: ...

Posted on Fri, 05 Jun 2020 00:03:52 -0700 by defunct

Tensorflow+MNIST reference notes

It's a shame. It's been a while since we contacted the neural network, but we haven't learned to use Tensorflow. We always use other ready-made models to complete the task It's mainly because when I first contacted Tensorflow, the most basic MNIST number recognition was not able to work out. I alway ...

Posted on Thu, 04 Jun 2020 06:02:05 -0700 by daniel_grant

Two dimensional code generation and scanning by iOS

Generation of QR code + (UIImage *)qrImageForString:(NSString *)string imageSize:(CGFloat)Imagesize logoImageSize:(CGFloat)waterImagesize{ CIFilter *filter = [CIFilter filterWithName:@"CIQRCodeGenerator"]; [filter setDefaults]; NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding]; [filter setValue:data f ...

Posted on Sun, 31 May 2020 06:22:03 -0700 by avillanu

Technology sharing how to write MySQL Shell plug-ins

Author: Hong bin The person in charge and technical service director of akerson South District, MySQL ACE, is good at database architecture planning, fault diagnosis, performance optimization analysis, with rich practical experience, helping customers in various industries to solve MySQL technical problems, and providing customers in finance, ...

Posted on Thu, 28 May 2020 02:07:16 -0700 by huzefahusain

Detailed explanation of important concepts of kafka and key configuration of cluster

Key concepts broker A broker is an instance of kafka, which is responsible for receiving, forwarding and storing messages. kafka cluster is composed of multiple brokers. topic kafka's topic is a logical concept, which is to group and classify messages, so as to distinguish and process messages of different business logic. The index concepts in ...

Posted on Wed, 27 May 2020 04:56:38 -0700 by mustang

php Session method instance

How to judge the user's operation authority through Session In most of the web development process, according to the actual needs, it is necessary to divide the rights of administrators and ordinary users to operate the web site. The following is a comprehensive explanation through a specific code example. (1) Design a landing page, add a form ...

Posted on Tue, 26 May 2020 02:46:38 -0700 by phpmady

Spring Boot develops and integrates WebSocket to realize private instant messaging system

###1 / General Using Spring Boot as the basic framework, Spring Security as the security framework and WebSocket as the communication framework, point-to-point chat and group chat are realized. ###2 / dependence required Spring Boot version 1.5.3 uses MongoDB to store data (not required). Maven relies on the following: <properties> ...

Posted on Mon, 25 May 2020 08:20:52 -0700 by fowlerlfc

Basic commands for 02-neo4j

1. Insert nodes.Insert a node of Person category that has an attribute name with an attribute value of Andres CREATE (n:Person {name : 'Liang Chuan Chuan'}); CREATE (n:Person {name : 'Quiet and quiet'}); CREATE (n:Person {name : 'Nicholas Tse',relation : "oldest maternal uncle"}); CREATE (n:Person {name : 'Thank you 2',relation : "2 Uncle" ...

Posted on Sun, 24 May 2020 09:43:40 -0700 by duankr