We all know that POST is generally used to submit data to the server. The four formats of POST submitted data are the four forms of Content-Type. Pay special attention to the format of the data in the body when http sends a request in each format. The 4 forms are: 1. application/x-www-form-urlencoded: URL encoded. […]
Do you really know how to use EXPLAIN in MySQL?
EXPLAIN is a powerful tool in MySQL database for query performance analysis and optimization. Through EXPLAIN, you can view the execution plan of the MySQL query and understand how MySQL executes your query statement. This article will introduce the use of EXPLAIN in detail to help you better understand and optimize MySQL queries. Why use […]
LinSNPGT: Genotyping specified SNP loci on Linux systems
LinSNPGT: Genotyping specified SNP loci on Linux systems General introduction background Test Data Install SNPGT SNPGT-build contact us General introduction We have developed a toolkit WinSNPGT for calling variant sites on Windows systems, which is very friendly to those with little Linux operating experience. It obtains genotypes from raw sequencing data for a specified SNP […]
jsp+servlet simple message board based on javaweb+mysql (java+jsp+servlet+javabean+mysql+tomcat)
jsp + servlet simple message board based on javaweb + mysql (java + jsp + servlet + javabean + mysql + tomcat) Private message Source code acquisition and debugging communication Operating environment Java≥8, MySQL≥5.7, Tomcat≥8 development tools eclipse/idea/myeclipse/sts, etc. can be configured to run Be applicable Course design, major assignments, graduation projects, project exercises, learning […]
XOR connection (trie)
link Consider for each c i c_i ci?, what to put? x x x is able to c i ⊕ x < K c_i\oplus x
PCL extracts point cloud boundary contour-AC method, plane contour
1. Overview PCL point cloud boundary feature detection (with complete code C++)_pcl calculates point cloud feature values_McQueen_LT’s blog-CSDN blog In terms of point cloud boundary feature detection (grid model boundary feature detection is already a deterministic problem, see grid model boundary detection), there is a method in PCL for point cloud boundaries that can be […]
Java generates docx document, docx document dynamic pie chart
Background: I recently received a request to generate a daily report, as shown below: ‘*’ represents a variable. It makes me uncomfortable to see that doc needs to be generated dynamically. Why is there such a need? Then I saw that there was a need to dynamically generate a pie chart, oh, no…there is no […]
[RK3568][Android12.0]— The system comes with preset third-party APK method
Platform: RK3568 OS: Android 12.0 Kernel: 4.19 Rockchip provides a mechanism to preset third-party APKs by default. The method is very simple: 1. Create the preinstall directory in device/rockchip/rk3568 (if you want it to be uninstallable, create the preinstall_del directory) 2. Put the APK you want to pre-install into this directory preinstall cannot be uninstalled […]
[PG] PostgreSQL high availability solution repmgr deployment (very detailed)
Table of Contents Introduction 1 Overview 1.1 Terminology 1.2 Components 1.2.1 repmgr 1.2.2 repmgrd 1.3 Repmgr users and metadata 2 Installation and deployment 2.0 Deployment environment 2.1 Installation requirements 2.1.1 Operating system 2.1.2 PostgreSQL version 2.1.3 Operating system users 2.1.4 Installation location 2.1.5 Version requirements 2.2 Installation 2.2.1 Software package installation 2.2.2 Source code compilation […]