Группа функций (переменных, символов …), с помощью которых реализуется “объектно-ориентированное расширение” (обращаю внимание, что автор системы старается избегать термина ООП, то есть объектно-ориентированного программирования или проектирования ка...
Date: 2024-06-07 This article explains PostgreSQL's recursive Common Table Expressions (CTEs), a powerful SQL feature for querying hierarchical data. Recursive CTEs, referencing themselves, enable traversal of tree-like structures. The article uses...
Introduction If you've ever worked with hierarchical or tree-structured data, you’ve probably hit the limitations of standard SQL. That’s where recursive SQL queries come in! In the first article of this three-part series, we explored recursion—what...
Introduction If you've ever worked with hierarchical or tree-structured data, you’ve probably hit the limitations of standard SQL. Trying to define and implement these relationships with joins quickly becomes messy, unreadable, and inefficient. Often...
*Class - глобальная переменная, содержащая текущий класс. class - определяет sym как класс с суперклассом(ами) typ. В качестве побочного эффекта глобальная переменная *Class устанавливается в obj. https://picolisp.tiddlyhost.com/#class : (class +Test...
Introduction While working on my latest project, I hit a roadblock: I needed to create a category menu to help organize and navigate content. It was a bit challenging at first, but after figuring it out, I wanted to share my experience. This guide wi...
I've been using the Nested set model for a while in Windwalker Framework, as it's built into its core ORM package. However, I realized that there isn't much discussion about this model in the dev community. The Nested set model is a data model design...
