#Programming (Програмування)
163 posts in category «Programming (Програмування)»
Notes on programming in Ukrainian: coding languages, algorithms, the latest technologies and other useful information for developers.
[Fix] No such file or directory @ rb_sysopen - tmp/pids/server.pid
Fix for starting the Rails server. Resolving the error No such file or directory @ rb_sysopen - tmp/pids/server.pid. Explaining t…
What is the difference between spec_helper.rb and rails_helper.rb in RSpec?
What is the difference between spec_helper.rb and rails_helper.rb in RSpec? How to effectively use these files for testing Ruby o…
What is PORO in Ruby?
What is PORO (Plain Old Ruby Object) in Ruby, how to use it to write understandable code. Why PORO is important for flexible desi…
[Fix] Factory not registered: "user" (KeyError) (FactoryBot / Rails 7)
Fixing the factory registration error in Rails (Factory not registered: "user" (KeyError)). Description of the factory_bot and fa…
Rounding decimal numbers: mathematical rules, JavaScript, and Ruby
Rounding decimal numbers: mathematical rules, JavaScript, and Ruby. Examples, pitfalls.
What is Convention over Configuration (in the context of RoR and beyond)?
What is convention over configuration (in the context of RoR and beyond)? What are the pros and cons of CoC?
What does the ACID principle mean in programming?
ACID — is a set of properties that guarantee the reliability of transactions in databases. Each transaction is a fundamental buil…
What is an RDBMS (relational database management system)?
What is an RDBMS (relational database management system)? What are RDBMS used for and how to use them?
What does relational mean (in the context of relational databases)?
What does relational mean (in the context of relational databases)? Where does the name come from and what does it mean?
What hierarchy does the DOM (Document Object Model) have?
What hierarchy does the DOM have? What elements are used in the structure of the DOM (Document Object Model)?
