Programmer Think

catalogue EFK architecture (elasticsearch\filebeat\kibana) 1. Download elasticsearch, kibana, filebeat 2. Create and authorize users 3. Install and start 3.1 install and start using elasticsearch account >3.1.1 unzip elasticsearch >3.1.2} configure elasticsearch >3.1.3} start elasticsearch >3.1.4 access 3.2 # install and s ...

Technical backgroundBefore we developed the front-end audio and video access module of GB28181 on Android platform, what we heard most in the industry was how to use Android or Windows to simulate the signaling and media streaming interaction process of GB28181 and realize the test of the overall scheme of GB28181 without national standard IPC ...

Eccharts data visualization tutorial (super detailed) Introduction to EChartsIntroduction to ECharts Step 1: Download and introduce schools JS fileStep 2: write code directory structureWrite index HTML codeEffect display Basic configuration of ECharts Main configuration (common)Case explanation supplement Sample linkExecu ...

Introduction to LVM LVM: Logical Volume Manager, Chinese name for logical volume management, is a convenient disk partition management mechanism. The difference from general disk partition management is that LVM can easily resize each partition without downtime. At the same time, you can also integrate multiple small physical disks into a larg ...

inspire Since it is a non recursive solution, there can be no indirect or indirect reference to itself in the function used. Iteration is to use a complete solution algorithm to bring the number of steps into the algorithm as a parameter for each step to obtain specific results. Therefore, to iterate, we must analyze the law embodied in ea ...

catalogue 1. Download resource package 2. Install PCL 3. Install openni2 two 4. Environment configuration 5. Configure pcl1 in vs2015 environment eight point one 1.6 testing 1.7 description 1.8 References: 1. Download resource package vs2015 is installed by default vs2015 Community Edition download address: https://my.visualstudi ...

Transaction management in Spring Before understanding the business: say a lie and withdraw money, such as you go ATM There are generally two steps to withdraw 1000 yuan by machine: first, enter the password amount and deduct 1000 yuan from the bank card; then ATM Pay 1000 yuan. Both steps must be performed or neither. If the bank card deducts ...

The official has also changed this knowledge point twice Bitmap can be said to be the most common memory consumer in Android. Many oom problems we encounter in the development process are caused by it. Google officials have also been iterating over its pixel memory management strategy. From Android 2.3.3 to 2.3-7.1 on the java heap, and back t ...

What is method swizzling?Method swizzling means method exchange. Its main function is to replace the implementation of one method with the implementation of another method at runtime. This is what we often call iOS black magic,In OC, method swizzling is used to realize AOP. AOP(Aspect Oriented Programming) is a programming idea, which is differ ...

brief introduction Before learning, you need to have a basic understanding of Promise. It is assumed that everyone is familiar with Promise This time, we will take our partners to realize the basic functions of Promise Promise's basic skeleton Promise then Promise. Multiple calls of then then chain call Implementation of catch finally imple ...