Tag: Programming
All the articles with the tag "Programming".
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ABC in Python: What It Is, Where It Comes From, and Why It Exists
When people begin exploring object-oriented design in Python, they eventually encounter this import: from abc import ABC, abstractmethod That usually leads to a natural question: what does ABC mean,
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Window Functions vs JOIN in Spark: A Physical Plan Perspective
When solving analytical queries in Spark SQL, there are often multiple correct formulations. However, they do not produce equivalent execution plans. This article compares two approaches to the same
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Why Small Tables Can Explode: Understanding JOIN Cardinality in SQL
It is common to assume that joining two small tables will produce a small result set. In practice, this assumption frequently fails. Even tables with only a handful of rows can generate unexpectedly
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Resolving the Node.js Error: Cannot find module jsonwebtoken
When developing backend services with Node.js, especially APIs that implement authentication, it is common to rely on JSON Web Tokens (JWT). One frequent runtime error encountered in this context is:
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Extracting and Managing Access Tokens in Postman
When working with APIs that use OAuth 2.0 or token-based authentication, a common requirement is to extract an access_token from a successful authentication request and reuse it in subsequent API
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Running Scheduled GitHub Actions Locally for Safer Debugging
Overview When working with scheduled automation jobs in GitHub Actions, it is common to face a simple but critical question: Can this workflow be executed locally before pushing to production? The
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Querying JSONB in PostgreSQL Efficiently
In modern applications, it is common to store semi-structured data in JSON format inside a relational database like PostgreSQL. However, to analyze this data properly, you need a way to transform it
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Understanding the Strategy Design Pattern
In the landscape of software design, maintaining flexibility and scalability is crucial. One of the most effective ways to achieve these qualities is by leveraging design patterns. Among the