Byebug: A powerful tool for in-depth exploration and debugging of Ruby code Project Description It is a powerful Ruby language debugger that allows developers to inspect code at runtime, understand the execution flow of the program, locate and fix errors. With Byebug, you can view variable values, step through code, set breakpoints, etc. through an…
The error is as follows: An error was reported during the installation of bundler; ERROR: Error installing bundler: bundler requires Ruby version >= 2.3.0. View current ruby version ruby -v # 2.0 1. Install rvm curl -sSL https://get.rvm.io | bash -s stable source /usr/local/rvm/scripts/rvm 2. Check the known ruby versions in the rvm library rvm…
Understand the relationship between brew, rvm, ruby, gem, and cocaspods In the macOS environment, the following relationships exist between Brew, RVM, Ruby, Gem, and CocoaPods: Homebrew (Brew): Homebrew is a package manager on macOS used to install and manage various open source software packages. It enables you to easily install, update, and uninstall software packages,…
acts_as_shopping_cart: Add shopping cart functionality to your Ruby application is a lightweight shopping cart plugin that can easily add shopping cart functionality to Ruby applications. What is acts_as_shopping_cart? acts_as_shopping_cart is a shopping cart gem based on Active Record. It provides a simple method to implement the basic functions of the shopping cart, such as adding…
4. Commonly used development tools for Ruby language – “Learn Ruby from Lao Lu” Common development tools for Ruby language RubyMine 1. Intelligent code editing 2. Debugger 3. Version control 4. Rails support 5. Multiple Ruby frameworks and libraries supported 6. Customization and extensibility 7. Cross-platform support 8. Powerful search and navigation functions 9. Integrated…
3. Ruby language structure – “Learn Ruby from Lao Lu” Ruby language structure Variables and constants Definition and use of variables Definition and use of constants variable scope Naming conventions for variables and constants Data type Control structure Method Classes and Objects Modules and hybrids Blocks and Iterators Metaprogramming Exception handling File and directory operations…
RabbitMQ installation documentation RabbitMQ official website download address: https://www.rabbitmq.com/download.html 1. Install dependencies Online installation depends on the environment: yum install build-essential openssl openssl-devel unixODBC unixODBC-devel make gcc gcc-c++ kernel-devel m4 ncurses-devel tk tc xz 2. Installation environment Upload the installation package to the linux environment 2.1 Install erlang environment rpm -ivh erlang-23.3.4.5-1.el7.x86_64.rpm Use yum to…
Table of contents Single RabbitMQ configuration 1.1. Import Maven coordinates 1.2. yaml configuration 1.3.java configuration class 1.3.1. Switch configuration 1.3.2. Queue configuration 1.3.3. Binding configuration 1.3.4. Connection configuration 1.4. Producer and consumer operation configuration 1.4.1. Producer operation configuration 1.4.2. Consumer operation configuration Multiple RabbitMQ configurations 2.1. yaml configuration 2.2.java configuration class 2.3. Producer and consumer…
A good memory is not as good as a bad pen The content comes from the Interview Guide – a collection of intermediate difficulty Ruby interview questions Question: Please explain what method visibility modifiers are in Ruby and what do they mean? In Ruby, method visibility modifiers are used to define the visibility and accessibility…
2022 CocoaPods installation tutorial Although the MacOS system comes with Ruby, it will not be upgraded if it is not managed. Check rvm and install Check whether rvm is installed, execute the command in the terminal: rvm -v, If the terminal appears: rvm: command not found, it means rvm is not installed. Install rvm, use…