nrm speeds up your Node.js development Preface Introduction to nrm Problems solved by NRM: Reasons to use NRM in Node.js development: Detailed steps on how to install and configure nrm Install NRM: Configure NRM: Basic usage of npm 1. List available npm sources: 2. Add a custom source (optional): 3. Switch npm source: 4. Test […]
Tag: rom
React technical principles and code development practice: from Jest to Enzyme
1. Background Introduction React is a JavaScript library developed by Facebook for building user interfaces. Its original intention was to solve the problem of low view rendering efficiency in JavaScript single-page applications. Facebook is also using React internally for the development of internal projects. This article will introduce some knowledge points about React principles, component […]
Continuing from the previous chapter in the book, C language loop structure:
Loops can be used to execute multiple statements multiple times. The “multiple statements” here are called the loop body. In C language, three types of loops can be used, namely: while, do…while and for. In these statements, the number of times the loop body is executed repeatedly is controlled by the loop condition, which is […]
antd-vue + vue3 realizes the dynamic addition and deletion of rows in a-table, and implements in-row input verification in a-table through a-from
1. Renderings Figure 1: Verification effect 2. Main code Note: 1. The form and table are bound to the same data tableSource and it is a data (ElementUI requires an object package array) 2. The form uses name binding -> :name=”[index, ‘vlan_id’]” 3. Form-item always needs to add rules -> :rules=”rules.blur” <a-form ref=”tableFormRef” :model=”tableSource” :label-col=”{ […]
SpringBoot3+Vue3+Mysql+Element Plus completes the database storage of blob type images, and the front end renders the base64 type images transmitted from the back end.
Foreword If your front-end and back-end separation project uses SpringBoot3 + Vue3 + Element Plus, and without OSS (object storage), use mysql to read and write images (may not be limited to images, to be tested). It took three days and after stepping on countless minefields, this function was finally completed. Presented to you. Complete […]
Analysis of Java memory model JMM and three major features from the operating system level
1. Parallelism and concurrency The purpose of both is to maximize CPU usage. Parallel: Refers to multiple instructions being executed simultaneously on multiple processors at the same time. So whether from a micro or macro perspective, the two are executed together. Concurrency: It means that only one instruction can be executed at the same time, […]
Talking about “360 panoramic stitching” of fisheye camera from open source projects
Table of Contents Overview Let’s start from the background of 360 panorama Talk about perspective changes across parameter calibration Post-processing of spliced pictures references Overview The reason for writing this article stems entirely from open source projects (see reference 1 for GitHub). This project covers a relatively complete production process of the surround view system, […]
Valgrind compatibility analysis: from core dependencies to error diagnosis
Directory title 1. Introduction: Overview and Importance of Valgrind Basic Functions of Valgrind Application Scenarios in Software Development (Application Scenarios in Software Development) 2. Dependencies of Valgrind Introduction to Core Dependency Libraries (Core Dependency Libraries) 2.2 Optional Dependencies and Enhanced Features 3. Compilation and Installation: Adding Library Support (Compilation and Installation: Adding Library Support) 3.1 […]
Application example of upgrading related functions based on ESP32 development board using MiSiQi application WIFI (key/advanced)+EEPROM+MQTT+OTA
I am an amateur electronics enthusiast and can use Chinese programming such as Yi Language and e4a. I have recently played with several microcontroller development boards and used MiSiQi for programming. I found that MiSiQi is good at simple programming but has more complex functions. Programming is difficult to use, especially for friends like me […]
prometheus+grafana+multiple collector installation configurations
Prometheus + grafana + multiple indicator collectors In this case prometheus is installed on the host 128.5.80.182 1 Install prometheus main program 1.1 Installation #Unzip the installation package tar zxvf prometheus-2.44.0.linux-amd64.tar.gz #Move the folder to the specified location cd prometheus-2.44.0.linux-amd64 mv */home/ap/prometheus #Create startup command to environment variable ln -s /home/ap/prometheus/prometheus /usr/local/bin/prometheus ##Verify Prometheus installation […]