Programmer Group

1, Notes Scala annotations use exactly the same as Java. Annotation is a good programming habit that a programmer must have. First sort out your thoughts through comments, and then reflect them in code. 1.1 single line notes package com.atguigu.bigdata.scala object ScalaComment{ def main(args: Array[String]): Unit = { // Si ...

0. Download Code using Git Installation and use of Git: https://blog.csdn.net/qq_44747572/article/details/121006841Clone Code: Pytorch version 1.0.0 source code: https://github.com/jwyang/faster-rcnn.pytorch/tree/pytorch-1.0 Download the zip and unzip it in the specified folder: 1. Data preparation Switch the path to fast-rcnn.pytorch ...

LVM ---- transfer space from / home installed by default in CentOS7 to the root directory/ 1, Basic concepts By default, LVM2 (Logical Volume Manager) is enabled in Cent0S 7. A hard disk of the machine is divided into two areas sda1 and sda2, in which sda1 is mounted as a system disk / boot, with a small amount of space; Sda2 acts as a physi ...

1. Course introduction first day: 1.Oracle concept and installation 2. Basic query 3. Condition query 4. Functions in Oracle the second day: 1. Multi table query (mysql also has the same concept, different syntax and important aspect) 2. Sub query (it also exists in mysql, with the same concept, different syntax and important aspect) on th ...

introduction After using JDK1.8, most list operations can be written using lamada expressions, which can make the code simpler and develop faster. The following are the common operations of lamada expressions I use in my work on list. I like to collect suggestions. Taking the user table as an example, the user entity code is as follows: public ...

join query MySQL connection query usually combines the record rows from two or more tables to splice data based on the common fields between these tables. First, determine a main table as the result set, and then selectively connect the rows of other tables to the selected main table result set. Connection queries that are frequently used ...

1. Include gateway describe The inclusive gateway can be regarded as an exclusive combination and parallel gateway. As with exclusive gateways, you can define conditions for outbound sequential flows that are evaluated by included gateways. But the main difference is that the inclusive gateway can adopt multiple sequence streams, such as para ...

🗽 Preliminary cognition of class and object C language is process oriented, focuses on the process, analyzes the steps to solve the problem, and gradually solves the problem through function call. JAVA is based on object-oriented and focuses on objects. It divides one thing into different objects and completes it by the interaction ...

Title Background praise Pass the exam Or is there a problem with the opening sequence It's not easy to visually check T1. T2 is greedy, so he plunged into T3 and began to push persimmons. As a result, there was no fruit for 1.5h, and then the mentality collapsed Then they began to fight violence. T2 made a mess that has been sorted all the time ...

introduction The previous article has gone over a lot of details, just to clarify the flow of tcc distributed transactions, and introduce the differences and application scenarios between it and the other two commonly used distributed transactions "reliable message queue" and "saga". Next, let's introduce our protagonist & ...