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

Realization of permission model based on shiro

1. shiro Apache Shiro is a powerful and easy-to-use Java security framework that performs authentication, authorization, password, and session management. With Shiro's easy to understand API, you can quickly and easily access any application, from the smallest mobile application to the largest network and enterprise application. Authentica ...

Posted on Sat, 23 May 2020 03:24:28 -0700 by lulubell

Mysql paging statement Limit usage

1. limit usage of Mysql When we use query statements, we often need to return the first few or some middle rows of data. What should we do at this time? never mind, mysql We have such a function. Sql code SELECT * FROM table LIMIT [offset,] rows | rows OFFSET offset The LIMIT clause can be used to force a SELECT statement to return the spec ...

Posted on Thu, 21 May 2020 01:00:12 -0700 by jpopuk

Python beginner's prerequisite: do you understand metaclasses?

Class is also an object Before you understand metaclasses, you need to master the classes in Python. The concept of classes in Python is a bit strange in light of Smalltalk. In most programming languages, a class is a set of code snippets that describe how to generate an object. This is still true in Python: >>> class ObjectCreator(obj ...

Posted on Mon, 18 May 2020 02:07:56 -0700 by RyanSmith345

Crud operation of Android SQLite database (case)

Article catalog 1. Summary of knowledge points 2. Case introduction 3. Layout file 4. Code 4.1 entity class: 4.2 create database 4.3 CRUD operation 5. Extension 5.1. Difference between getWritableDatabase() and getReadableDatabase(): 5.2. Interface description of SQLiteDataBase object ...

Posted on Sun, 17 May 2020 03:20:04 -0700 by exploo

Detailed explanation of common sql statements in MySQL database operation add, delete, change, query, comment, fuzzy query, multi table linkage, regular expression, etc

catalog 1. Single line comments in SQL statements 2. Multiline comment 3. Create a new database 4. Delete database 5. Create table 6. Delete data table in MySQL 7.MySQL insert data 8.MySQL query data 9.MySQL UPDATE records 10.MySQL DELETE statement delete records 11.MySQL LIKE clause fuzzy query 12.MySQL UNION operator union query ...

Posted on Sat, 16 May 2020 03:43:33 -0700 by terandle

Spring Cloud Cognitive Learning: Ribbon Use

Catalog Ribbon Load Balancing Simple steps to use: 1. New module for load balancing 2. Modify the module code: 3. Start module 4. Modify the consumer module Load balancing algorithm: Custom load rules: (viii)Connect Last Spring Cloud Cognitive Learning (1): Introduction to Spring Cloud and Eureka Use (viii)The previous article introduc ...

Posted on Thu, 14 May 2020 21:34:05 -0700 by kool_samule

Training DeepFM under PAI-Notebook

Training DeepFM under PAI-Notebook It should be said that DeepFM is one of the most common CTR prediction models at present. For a recommendation system based on CTR estimation, the most important thing is to learn the combination of features behind user click behavior.In different recommended scenarios, low-order or high-order combinatorial fe ...

Posted on Thu, 14 May 2020 20:06:07 -0700 by ZaZall

C ා data operation series - 5. Introduction to ef core

0. Preface The previous chapter introduced the ORM framework briefly, and wrote a tool class similar to orm. This chapter will introduce the Core version of Entity Framework, a famous ORM framework in the C ා world. The non Core version of Entity Framework has been updated to 6 generations, which is a proven ORM framework. Here is a brief intro ...

Posted on Thu, 14 May 2020 03:05:51 -0700 by rebelo

The implementation of flash restful API and the basic permission control based on flash httpauth

This series of tutorials is divided into four stages 1.flask restful web service 2.flask restful api 3.flask Httpauth to realize authority control 4.uwsgi Manage flask applications  In the first two articles, we have studied the development and implementation of basic web services and restful api. After the implementation of interface develop ...

Posted on Thu, 14 May 2020 02:22:01 -0700 by Javizy