Hello. My name is A.R. ZERIN. I am an Entrepreneur, Technology Optimist and a Software Engineer from Dhaka, Bangladesh .
Programming is my passion. Life is beautiful, so I am trying hard to enjoy it.
I have completed my Undergraduate Degree in Computer Science & Engineering at 2004 and working in the era of IT for last 14+ years dedicatedly.
I am a believer of, “He who aims at the sky, shoot higher much than he who aims at a tree“.

Machine Learning
Building a Next Word Prediction Model Using Deep Learning and Python
December 16, 2024
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Introduction to Next Word Prediction Next word prediction is a powerful language modeling task in machine learning. The goal of this task is to predict the most likely word (or sequence of words) that follows a given input context. It relies on statistical patterns and linguistic structures to generate predictions based on the provided context. […]
Data Science ETL Machine Learning
Building an ETL Pipeline with PySpark: A Step-by-Step Guide
December 16, 2024
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An ETL (Extract, Transform, and Load) pipeline is an essential data engineering process that extracts raw data from sources, transforms it into a clean, usable format, and loads it into a target storage system for analysis. For large-scale data processing, PySpark—with its distributed computing capabilities—is a robust choice. In this guide, we’ll walk through building […]
Docker
How to Docker Container for Laravel 11 App with php 8.2
December 14, 2024
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Suppose you are buiding a project that you want to provide Docker Container as well so that other team members can use the same project using same machine environment like your product machine: First I am creating laravel app named MyApp:: # composer create-project laravel/laravel MyApp Create a Folder docker-setup, copy the folder MyApp contents […]
Server
How to Connect to Bluehost server using Shell Access
December 5, 2024
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Manually generating your SSH key in macOS To open the macOS Terminal, follow these steps: In Finder, choose Utilities from the Applications folder. Find Terminal in the Utilities listw. Open Terminal. Generating an SSH key An SSH key consists of a pair of files. One is the private key, which should never be shared with anyone. The other is the public […]
Machine Learning
What is Mean Squared Error (MSE)?
October 17, 2024
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Introduction When working with machine learning models, especially in regression tasks, it’s crucial to evaluate how well your model is performing. One of the most commonly used metrics for this purpose is Mean Squared Error (MSE). In this blog, we’ll break down what MSE is, why it’s important, and walk through a simple Python example […]
OOP Software Engineer Interview Question
OOP Interview Question
October 15, 2024
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1) What is Object-Oriented Programming (OOP)? Answer:   OOP is a programming paradigm based on the concept of objects, which  can contain data in the form of fields (attributes or properties), and code in the form of procedures (methods or functions). 2) What are the four main principles of OOP? Answer:   Encapsulation, Inheritance, Polymorphism, and Abstraction. […]
Google Colab
How to Install & Run Python Flask in Google Colab with Ngrok | Step-by-Step Guide
October 13, 2024
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In this video, I’ll show you how to install and run a Python Flask web application in Google Colab and expose it to the internet using Ngrok. Learn how to set up Flask, handle Ngrok for public URLs, and test your Flask app live. This tutorial is perfect for Python developers who want to quickly […]
Uncategorized
Best way to Learn Anything
September 27, 2024
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Best way to Learn Anything
These are the concepts that I follow to learn anything in a better way:   How to become expert at thing: 1. iteratively take on concrete projects and accomplish them depth wise, learning “on demand” (ie don’t learn bottom up breadth wise) 2. teach/summarize everything you learn in your own words 3. only compare yourself […]
Uncategorized
Entrepreneur Work Motivation
September 27, 2024
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“Develop a habit of working on your own projects. Don’t let “work” mean something other people tell you to do. If you do manage to do great work one day, it will probably be on a project of your own. It may be within some bigger project, but you’ll be driving your part of it.” […]
CodeIgniter Framework
How do i install older version of CI4 using composer
October 10, 2023
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Sometimes when you run git update & composer update, it updates codeigniter framework, then suddenly your app stops working unless you upgrade your codebase as per new framework requirement or downgrade to last version that you had. The below is the command to downgrade codeigniter to a version: # composer require codeigniter4/framework:4.1.5  
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