Command Query Responsibility Segregation (CQRS)

References

[1] CQRS - https://martinfowler.com/bliki/CQRS.html

[2] What is the CQRS pattern? - Azure Architecture Center | Microsoft Docs - https://docs.microsoft.com/en-us/azure/architecture/patterns/cqrs

[3] An illustrated guide to CQRS data patterns | Enable Architect - https://www.redhat.com/architect/illustrated-cqrs

[4] Command Query Responsibility Segregation (CQRS) pattern - IBM Cloud Architecture Center - https://www.ibm.com/cloud/architecture/architectures/event-driven-cqrs-pattern/

[5] CQRS: What? Why? How?. CQRS is a useful pattern to reason… | by Stéphane Derosiaux | Medium - https://sderosiaux.medium.com/cqrs-what-why-how-945543482313

Finance participate in operation and management

So what should finance do to truly participate in operation management? First of all, we must understand what the boss’s basic requirements for finance are?

So, what are the basic financial requirements of most private company bosses?

openssl

The problem seems to be that homebrew upgraded their openssl install to 1.1. That version of openssl won’t work with rubies prior to 2.4.x. This problem was probably introduced to your Mac when you upgraded homebrew.

1

/Users/cloudolife/.rvm/rubies/ruby-2.3.0/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- openssl (LoadError)

Active Record Basics

This guide is an introduction to Active Record.

After reading this guide, you will know:

• What Object Relational Mapping and Active Record are and how they are used in Rails.

• How Active Record fits into the Model-View-Controller paradigm.

• How to use Active Record models to manipulate data stored in a relational database.

• Active Record schema naming conventions.

• The concepts of database migrations, validations, and callbacks.

Active Record Query Interface

Configuring Gzip & Brotli Compression for Nginx

Configuring Gzip & Brotli compression on an Nginx web server running in Linux. Gzip & Brotli are the most popular compression algorithms supported by major web browsers.

Nginx WebSocket proxying

WebSocket is a computer communications protocol, providing full-duplex communication channels over a single TCP connection. The WebSocket protocol was standardized by the IETF as RFC 6455 in 2011, and the WebSocket API in Web IDL is being standardized by the W3C.

whenever

Whenever is a Ruby gem that provides a clear syntax for writing and deploying cron jobs.

Homebrew - The Missing Package Manager for macOS (or Linux)

Homebrew is an essential piece of software to help you organize the tools you use. The package manager allows you to install a large number of software like NodeJS or new versions of Git and will help you to keep them up to date.

These Homebrew commands will help you installing and maintaining the set of tools you need to develop good software.

Syntactic sugar in Ruby

Ruby uses syntactic sugar to make some of its syntax more expressive, or easier to read.