Programmer Group

Code address of this series: https://github.com/JoJoTec/sp...Let's test the previously encapsulated WebClient. From here on, we use spock to write groovy unit tests. The written unit tests are simpler and more flexible. We can see it in the next unit test code.Write spring boot context test based on spockWe add the configuration designed earlie ...

Java in those let you love the manual tool library, refining the amount of code 1, New features of JDK1.8 Stream 1. Common generation methods of Stream ① Collections in the Collection system can generate streams using the default method stream() //list to stream List<String> list = new ArrayList<>(); Stream<String&gt ...

All code for this experiment has been uploaded to your personal github repository: https://github.com/Scienthusiasts/Machine-Learning Logistic Regression for Gesture Recognition A long time ago, bloggers themselves had conceived a complete gesture recognition system with an interface, which could not only detect the gesture of the hand, b ...

1. A4988 introduction A4988 has built-in decoder. We can control the stepping motor through two pins of the controller, one controls the rotation direction and the other controls the number of steps. A4988 provides five different microstep controls: Full stepHalf stepQuarter stepEight stepSixteenth step In addition, it is equipped w ...

prefaceWhy do I need to decode pictures?In fact, both JPEG and PNG pictures are compressed bitmap graphics format. But PNG pictures are lossless compression and support alpha channel, while JPEG Pictures are lossy compression, and 0-100% can be specified Therefore, the original pixel data of the picture must be obtained before the picture in ...

Don't read the big talk data structure book clearly. The graph structure is complex, and there may be a connection between any two vertices. Therefore, the relationship between elements cannot be represented by the physical position of data elements in memory, that is, the graph cannot be represented by a simple sequential storage structure. A ...

ROS_ Core analysis of Python programming case code Through the intermediate tutorial supporting the Handsfree mini robot platform, I learned about ROS_ The knowledge of realizing sensor data reading, motion control and autonomous navigation by python programming is summarized as follows: 1. Sensor data reading 1.1 obtain and print the ba ...

Looking for "single dog" programming problem summary The single dog problem is to find the number that only appears once in the array. Others are one-to-one pairs (the number has appeared twice in the array), and only it is a person (there is only one in the array). It is particularly eye-catching like the "single dog". How ...

ShardingSphere + MySQL implementation sub database 1, About ShardingSphere ShardingSphere is an ecosystem composed of a set of open-source distributed database middleware solutions. It is composed of sharding JDBC, sharding proxy and sharding sidecar (planned). They all provide standardized data fragmentation, distributed transaction and data ...

1. Push in vector_ Back operation push_ The function of back is to add a new element at the end of the vector. The content of val is copied (or moved) to the new element. This effectively increases the container size by 1. If and only if the size of the new vector exceeds the current vector capacity, the new storage space will be reallocated au ...