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For a long time, Redis, as a Nosql database, has been widely used in a variety of projects due to its function of frying chickens and cows. I didn't think much of Redis before, but now I like it more and more. It is often used to store some common data, such as user id, session, user menu permission, me ...

seata introduction Seata is Alibaba's open-source distributed transaction solution in 2019, which is committed to providing high-performance and easy-to-use distributed transaction services under the microservice architecture. Before the open source of Seata, the corresponding internal version of Seata played a role of distributed consistency M ...

>Simple Extensible Autonomous Transacation Architecture, seata is a simple, scalable and highly autonomous distributed architecture SEATA Server Configure >Because we use the official version 1.0.0-GA, most of the instructions found on the Internet are version 0.X, with many changes. For example, the script of db_store.sql is cancelled in ...

Explain TouchId fingerprint recognition, FaceId face unlocking, collectively referred to as biometrics. Realization Introduce the Local Authentication Framework. If it's iOS 13, it's available by default. You don't need to re introduce it. import LocalAuthentication Check that biometrics are avail ...

Observe the indicators and check the connection consumption --View session session: select * from v$session where username is not null select username,count(username) from v$session where username is not null group by username --View current connections select count(*) from v$process; --View maximu ...

WeChat public address: Dotnet9 Website: Dotnet9 , questions or suggestions: Please leave a message on the website， If it helps you: Welcome appreciation. C × WPF chat interface (3 / 3) Reading navigation Background of this article code implementation Reference in this article 1. Backgrou ...

There are two entities: user and membership card. A user can only process one membership card, that is, one-to-one.     user_tb: The primary key card_no of card_tb is introduced as the foreign key.     card_tb:         Mode 1: Use extension classes to implement one-to-one (1) Create a new User class under the pojo package: package com.chy.p ...

git https://github.com/tensorflow/models Download the cifar10 file and put it in the project path Project structure   download from cifar10 import maybe_download_and_extract maybe_download_and_extract()   Default download path   Read display manually import numpy as np import pylab filename = '/tmp/cifar10_data/cifar-1 ...

1. Window adding process 1.1 start from the source To add a small floating window, you need to use addView of WindowManager, And we checked the official documents and found that WindowManager is an interface public interface WindowManager implements ViewManager Its real implementation is WindowManagerImpl, which h ...

1. the project uses AFNetworking, which has been encapsulated as a tool class. The new version of 20180911 has been updated, and a preliminary study has been made on this 1.1 use case list: AFHTTPSessionManager *mgr = [AFHTTPSessionManager manager]; mgr.requestSerializer = [AFHTTPRequestSerializer serializer]; ...