Directory 1. Introduction to iterators 2. Applicable scenarios 3. Advantages and Disadvantages 4. Use cases 5. Case (python implementation) 1. Introduction to iterators There are many different types of iterators in Python that are used in different ways of traversing and accessing collections of data. Here are some common Python iterators: List Iterators: Use a […]
Interface testing: Swagger application
Interface testing: Swagger application 1. Create a project and module from scratch The project structure is as follows book #Project name –common #submodule –domain #submodule –book #submodule-business module 1.1 New project Next, use the idea sub-module to create a new project. Basically no modifications are made, just go to the next step. Open the pom.xml […]
Design of multifunctional crib control system based on 51 microcontroller
Table of contents 1. Introduction 2 2. System structure design 3 2.1 System block diagram 3 2.2 System functions 4 2. The voice control module can collect in real time whether the baby is crying; 4 2.3 System solution demonstration 5 2.3.1 Selection and demonstration of main control chip 5 3 System Hardware Design 5 […]
The concurrency of index creation in oracle19c is the same as the number of server CPUs, and the creation speed is the fastest. Verification of the conclusion
Recently, during a data transfer in Guiyang, I encountered a DBA using 1000 concurrency to create an index. I felt that if I played this way, the CPU would have to switch about 30 times on the same task. Would this be faster? In order to refute this view, I conducted a test with the […]
The most detailed image pyramid principle and implementation of downsampling
Table of Contents What is an image pyramid? principle Downsampling Parameter analysis Code Advantages and Disadvantages Advantages of downsampling Disadvantages of downsampling What is an image pyramid? Image pyramid is a multi-scale expression of an image. Arranging the images at each scale from small to large in resolution from top to bottom will form a […]
22. Ubuntu22.04 + Yolov8 easy to use
Twenty-two, Ubuntu22.04 + Yolov8 simple to use 1. Environment configuration 2. Simply use Yolov8 through the command line 2.1 Target detection detect 2.2 Semantic segmentation segment 2.3 Target classification 2.4 Pose estimation pose 2.5 Verify YOLOv8n on COCO128 2.6 Training YOLOv8n on COCO128 3. Model improvement and training 3.1 Source code download 3.2 Data set […]
Solve the problem that in MyBatis one-to-many query, there is only one element in each group, and the total number of groups is equal to the total number of elements.
Article directory Brief description of the problem scene description Problem Description problem causes Solution Brief description of the problem The author encountered a strange problem when using MyBatis for one-to-many query. Regarding the author’s one-to-many query results, a phenomenon occurred: It turns out that there are multiple elements in each group, and the query target […]
Use ChaosBlade to verify DLRover’s resiliency and fault-tolerant stability
Text | Wang Qinlong (Flower name: Chang Fan) Ant Group AI Systems Engineer ChaosBlade is an open source experimental injection tool developed by Alibaba that follows chaos engineering principles and chaos experiment models and can be used to verify the stability of cloud native systems. As a cloud-native distributed training system, DLRover provides elasticity and […]
2023.10 (U disk burning iso) host, vmware, virtualbox installation linux/ubuntu/kali/centos stream9/arch
download 1 kali official website 2 ubuntu official website 3vmware workstation pro (latest version 17pro) 4 virtualbox for linux sudo apt install virtualbox-ext-pack 5 win32 disk imger Format file system – windows file system – NTFS: NTFS (New Technology File System) is the default file system of Windows, providing features such as file and folder […]
How to perform string search and replace operations?
String search and replace operations are common text processing tasks in the C language. The search operation is used to locate a specific substring in a string, while the replace operation is used to replace one substring with another substring. In C language, these operations usually need to be completed using character arrays and standard […]