1. Event flow Event flow is a description of the event execution process, which is the flow process of the entire event. When any event is triggered, it will always go through two stages: [Capture stage] and [Bubbling stage]. In short, the capture phase is the transmission process [from father to son], and the bubbling […]
Tag: flow
The use of data, the creation of table relationships, and the request life cycle flow chart of the Django framework
Table of Contents 1. Add, delete, modify and check data 1. Display of user list 2. Modify the logical analysis of data 3. Analysis of deletion function 2. How to create table relationships 3. Django’s request life cycle flow chart 1. Add, delete, modify and check data 1. Display of user list Query all user […]
React recursive handwritten flow chart displays tree data
Requirements Draw a flow chart display based on the data structure of the tree, and support the addition of previous level, next level, sibling and deletion functions (it is convenient to mark nodes, and the node data is displayed as a label, and it is processed according to the situation in actual business) File structure […]
Attack and utilization techniques of overflow vulnerabilities in exception handling – Part 1
This article focuses on the exception handling corresponding to C++ under Linux, that is, the study of attack methods for the unwind exception handling process based on eh_frame. Since there are certain differences in the exception handling process and underlying implementation in different operating systems and languages, specific issues need to be dealt with on […]
(StateFlow & ShareFlow) VS (Flow & LiveData)
Table of Contents data flow General process Switch thread StateFlow & ShareFlow StateFlow Build StateFlow &ShareFlow In the previous articles on Flow, collect function analysis and imitation of Flow builder to create data flow articles, we explored the simple use of flow and its simple principles. However, during the production process, we often borrow these […]
Apache Airflow (2): Airflow stand-alone construction
Personal homepage: IT Pindao_Big data OLAP system technology stack, Apache Doris, Clickhouse technology-CSDN blog Private chat with bloggers: Join the big data technology discussion group chat to get more big data information. Blogger’s personal B stack address: Brother Bao teaches you about big data’s personal space – Brother Bao teaches you about big data personal […]
Event types supported by Flowable6.8.0 process listening event engine
Event types supported by Flowable process event engine Instructions on process definition listeners Event listeners can only be declared on the process element as a child element of extensionElements. (Event) listeners cannot be defined on individual nodes (activities). Expressions in delegateExpression, unlike other expressions (such as those in gateways), do not have access to the […]
vins-mono front end (1) – image optical flow tracking
Table of Contents Preface feature_tracker_node detailed explanation Preparation img_callback() detailed explanation Foreword The vins front-end mainly includes two parts: image optical flow tracking and imu pre-integration. Optical flow tracking is mainly used to track the same map point information of two adjacent frames of images, so that the back-end can solve the pose transformation between […]
[Session Technology] The workflow, differences and how to use Cookie and Session
Cookie Technology Web programs are transmitted through the HTTP protocol, and HTTP is a stateless protocol. When a client sends a request to the server, after the server returns a response, the connection is closed, and no connection information is retained on the server side. When the client sends multiple requests and requires the same […]
CVE-2023-0179-Nftables integer overflow
Foreword Netfilter is a network packet filtering framework for Linux operating systems that provides a flexible way to manage the flow of network packets. Netfilter allows system administrators and developers to control how data packets are processed in the Linux kernel to implement network security, Network Address Translation (NAT), packet filtering and other functions. Cause […]