Software Engineer. Specialized in web application development using technologies likehttps://byandrev.dev/en-ushttps://byandrev.dev/en/blog/optional-in-javahttps://byandrev.dev/en/blog/optional-in-javaIf you've been programming in Java for a while, you're probably very familiar with NullPointerException. It always seems to appear at the worst possible time, almost always in production, and its error message rarely tells you exactly which variable was null.Fri, 10 Jul 2026 01:53:10 GMTjavaAndres Parrahttps://byandrev.dev/en/blog/the-cheapest-way-to-code-with-aihttps://byandrev.dev/en/blog/the-cheapest-way-to-code-with-aiOpenCode Go: GLM, Kimi, Qwen, and DeepSeek models for $5–$10/month. I analyze the limits, how to connect it, and whether it’s worth it compared to Claude.Sun, 28 Jun 2026 20:55:46 GMTaiopencodeclaudeAndres Parrahttps://byandrev.dev/en/blog/12-months-of-free-ai-with-zed-for-studentshttps://byandrev.dev/en/blog/12-months-of-free-ai-with-zed-for-studentsGet Zed Pro free for 12 months as a university student. Access AI models, real-time collaboration, and premium coding features.Wed, 10 Jun 2026 18:01:13 GMTaizedfreestudentsAndres Parrahttps://byandrev.dev/en/blog/my-son-the-openai-serverhttps://byandrev.dev/en/blog/my-son-the-openai-serverSam Altman has said that he finds the comparison made regarding the energy consumption of artificial intelligence unfair, and that no one questions how much energy is used to "train" a human.Mon, 01 Jun 2026 17:12:14 GMTaihumorironyAndres Parrahttps://byandrev.dev/en/blog/10-best-practices-for-opencodehttps://byandrev.dev/en/blog/10-best-practices-for-opencodeOpenCode is a powerful tool, but like any tool, the difference between using it and mastering it lies in the details. These are the tips that have helped me the most in my day-to-day work.Tue, 31 Mar 2026 05:00:00 GMTaiopencodeAndres Parrahttps://byandrev.dev/en/blog/using-ai-for-reading-bookshttps://byandrev.dev/en/blog/using-ai-for-reading-booksUse AI to learn from books quickly, like Andrés Bilbao from Rappi. It's the ideal "entry point" for new topics before delving deeper.Wed, 25 Mar 2026 23:59:55 GMTaibooksAndres Parrahttps://byandrev.dev/en/blog/what-is-graphqlhttps://byandrev.dev/en/blog/what-is-graphqlGraphQL is a query language for APIs and a runtime environment for those queries, created by Facebook (Meta) in 2012 and released as open source in 2015.Wed, 18 Mar 2026 01:14:54 GMTgraphqlAndres Parrahttps://byandrev.dev/en/blog/how-to-use-opencode-and-github-copilot-pro-for-free-as-a-studenthttps://byandrev.dev/en/blog/how-to-use-opencode-and-github-copilot-pro-for-free-as-a-studentOpenCode is an AI-powered terminal agent that edits entire projects. It allows you to use GitHub Copilot for free for students and offers Plan and Build modes to track code changes.Fri, 13 Mar 2026 01:55:28 GMTaigithubopencodeAndres Parrahttps://byandrev.dev/en/blog/product-review-classification-with-naive-bayeshttps://byandrev.dev/en/blog/product-review-classification-with-naive-bayesA step-by-step exercise on how to classify customer reviews of products using NLP with the Naive Bayes classifier to determine if they are positive or negative.Fri, 20 Feb 2026 05:00:00 GMTainplAndres Parrahttps://byandrev.dev/en/blog/why-json-ld-is-important-for-seohttps://byandrev.dev/en/blog/why-json-ld-is-important-for-seoLearn what JSON-LD is and how to use this linked data format to improve your website's SEO and appear in Google's knowledge panels.Sun, 15 Feb 2026 19:50:24 GMThtmlseoAndres Parrahttps://byandrev.dev/en/blog/linear-regression-to-predict-salaryhttps://byandrev.dev/en/blog/linear-regression-to-predict-salaryI built a linear regression model in Python with sklearn to predict salaries: cleaning, splitting, training, and metrics.Fri, 13 Feb 2026 22:49:16 GMTaimachine-learningAndres Parrahttps://byandrev.dev/en/blog/using-whisper-to-transcribe-videoshttps://byandrev.dev/en/blog/using-whisper-to-transcribe-videosWhisper is OpenAI's artificial intelligence tool that has revolutionized audio and video transcription. In this guide, you will learn how to install this open-source system on your PC or integrate it using its API to automatically generate subtitles (SRT/VTT).Fri, 13 Feb 2026 16:18:31 GMTaiopenaiAndres Parrahttps://byandrev.dev/en/blog/performance-metrics-in-machine-learninghttps://byandrev.dev/en/blog/performance-metrics-in-machine-learningEvaluating a model means measuring where it fails. In regression: MSE, RMSE, MAE, and R2. In classification: Accuracy, Precision, Recall, F1, and ROC AUC.Fri, 13 Feb 2026 00:03:45 GMTaimachine-learningAndres Parrahttps://byandrev.dev/en/blog/vector-and-matrix-operationshttps://byandrev.dev/en/blog/vector-and-matrix-operationsHave you ever wondered how Netflix decides what to recommend to you or how an algorithm measures how “good” a candidate is? The answer is not magic, it's linear algebra.Thu, 05 Feb 2026 22:50:10 GMTaimachine-learningpythonAndres Parrahttps://byandrev.dev/en/blog/linear-algebra-basics-for-machine-learninghttps://byandrev.dev/en/blog/linear-algebra-basics-for-machine-learningAlgebra allows us to represent and manipulate real-world problems using numbers. Thanks to algebra, we can model relationships, analyze data, and find solutions in a logical and structured way.Thu, 05 Feb 2026 20:50:24 GMTaimachine-learningpythonAndres Parra