Code Chronicles

Advanced engineering concepts explained through code, diagrams, and real-world examples

Search across 146 posts, 19 explainers, and 60 topics

How to Run LLMs on Your Own Computer

How to run Llama, Mistral, and other open source models on your own hardware

January 13, 2026 AI software-engineering

How to Run LLMs on Your Own Computer

Monitoring individual queue in sidekiq

The default interface of sidekiq allows you to see the number of processed and failed jobs...

Monitoring individual queue in sidekiq

rails ruby

Why aren't you using binstubs yet?

If you have been using bundle exec to run any executable gem and tired of...

Why aren't you using binstubs yet?

rails ruby

Offline Mode Of Android Apps

I presented this talk in droid con London 2017. Here are the slides for download....

Offline Mode Of Android Apps

android presentation

My upcoming talk in DroidConUK

I am very excited to be joining DroidConUK to share my learnings on Offline Mode...

My upcoming talk in DroidConUK

android conference

Integrating Sherlock with android apps

Its always a challenge for an app tester to report crashes to the developers. Because...

Integrating Sherlock with android apps

android

Why your android application needs awareness api

Google introduced android awareness api in I/O 16. It offers a lot of awesome features...

Why your android application needs awareness api

android

Java custom annotations

We use a lot of java annotations in our day to day coding. Ever thought...

Java custom annotations

java

Prevent push on red build with the help of gocd_pre_push

An agile team delivers their software as and when they are ready with a small...

Prevent push on red build with the help of gocd_pre_push

ruby rubygem

Conway's Game Of Life

Conway’s game of life is a zero players game. It is played on a rectangular...

Conway's Game Of Life

javascript game

Notify when android device network status changes

There are a lot of applications in the play store that notifies you when your...

Notify when android device network status changes

android

Observer Design Pattern

What is Observer Design Pattern?

Observer Design Pattern

java design-patterns

Filter Design Pattern

What Is Filter Design Pattern?

Filter Design Pattern

java design-patterns

Ruby gem to fetch information from gocd as rich models

What is GoCD?

Ruby gem to fetch information from gocd as rich models

ruby gocd

Android Data Binding

Hello friends, Recently I have tried android’s new library Android Data Binding. My experience with...

Android Data Binding

android

Android Custom Animations

Hello Folks, Recently I have been writing around Android UI Styling and Design. This is...

Android Custom Animations

android

shell_session_update: command not found

This problem has troubled me a lot before I found the solution to it. And...

shell_session_update: command not found

rvm ruby

Android Draggable View

Hello Folks, this blog will help you add a draggable view to your android page....

Android Draggable View

android

Android UI Design And Styling

Hello friends, Recently I have been doing some Android UI Design And Styling training sessions....

Android UI Design And Styling

android

GIT revert multiple commits

Hello Folks, there are situations when you need to revert all the commits of a...

GIT revert multiple commits

git shell

apkToJava - Gem to convert apk file to java code

Hello Friends, here I am with another cool ruby gem apkToJava which will help you...

apkToJava - Gem to convert apk file to java code

android rubygem

Explore All Posts

How to Run LLMs on Your Own Computer

How to Run LLMs on Your Own Computer

How Database Indexing Works

How Database Indexing Works

Universal Commerce Protocol (UCP) Explained

Universal Commerce Protocol (UCP) Explained

How to Build AI Agents That Actually Work

How to Build AI Agents That Actually Work

The Gang of Four Patterns Every Developer Should Know

The Gang of Four Patterns Every Developer Should Know

Role of Queues in System Design

Role of Queues in System Design

Context Engineering Guide for AI Developers

Context Engineering Guide for AI Developers

Majority Quorum in Distributed Systems Explained

Majority Quorum in Distributed Systems Explained

Caching Strategies Explained: The Complete Guide

Caching Strategies Explained: The Complete Guide

CQRS Pattern: Splitting Read and Write Models

CQRS Pattern: Splitting Read and Write Models

The Complete HTMX Guide: From Zero to Production

The Complete HTMX Guide: From Zero to Production

How Google Ads Supports 4.8 Billion Users with a SQL Database

How Google Ads Supports 4.8 Billion Users with a SQL Database

How Amazon S3 Stores 100 Trillion Objects Without Losing One

How Amazon S3 Stores 100 Trillion Objects Without Losing One

Two-Phase Commit: The Protocol That Keeps Distributed Transactions Honest

Two-Phase Commit: The Protocol That Keeps Distributed Transactions Honest

Modular Monolith: The Architecture Most Teams Actually Need

Modular Monolith: The Architecture Most Teams Actually Need

The Complete Guide to Server-Sent Events (SSE)

The Complete Guide to Server-Sent Events (SSE)

Long Polling Explained: Build Real-Time Apps Without WebSockets

Long Polling Explained: Build Real-Time Apps Without WebSockets

How Stock Brokers Push 1 Million Price Updates Per Second to Your Screen

How Stock Brokers Push 1 Million Price Updates Per Second to Your Screen

HOCON vs YAML vs TOML vs JSON: Complete Configuration Format Comparison

HOCON vs YAML vs TOML vs JSON: Complete Configuration Format Comparison

Heartbeat: How Distributed Systems Know You're Still Alive

Heartbeat: How Distributed Systems Know You're Still Alive

Your JSON is Costing You Thousands: Why TOON Might Save Your Budget

Your JSON is Costing You Thousands: Why TOON Might Save Your Budget

Stop Blocking Your Paying Customers: Build a Smart Rate Limiter

Stop Blocking Your Paying Customers: Build a Smart Rate Limiter

Visitor Design Pattern

Visitor Design Pattern

How Shopify Powers 5 Million Stores Without Breaking a Sweat

How Shopify Powers 5 Million Stores Without Breaking a Sweat

WebTransport: The Protocol That Fixes What's Broken in WebSockets

WebTransport: The Protocol That Fixes What's Broken in WebSockets

What Actually Happens When You Type a URL

What Actually Happens When You Type a URL

Interpreter Design Pattern

Interpreter Design Pattern

Postgres 18: The Release That Makes Databases Fast Again

Postgres 18: The Release That Makes Databases Fast Again

Java 25 is Finally Here: The LTS Release That Changes Everything

Java 25 is Finally Here: The LTS Release That Changes Everything

How Ticket Booking Systems Handle 50,000 People Fighting for One Seat

How Ticket Booking Systems Handle 50,000 People Fighting for One Seat

Hash Collisions: The Hidden Performance Killer in Your Code

Hash Collisions: The Hidden Performance Killer in Your Code

Memento Design Pattern

Memento Design Pattern

Why JWT Replaced Sessions: Building Auth That Scales

Why JWT Replaced Sessions: Building Auth That Scales

How Kafka Works: The Engine Behind Real-Time Data Pipelines

How Kafka Works: The Engine Behind Real-Time Data Pipelines

Kubernetes Architecture: The Operating System for the Cloud

Kubernetes Architecture: The Operating System for the Cloud

How Meta Achieves 99.99999999% Cache Consistency

How Meta Achieves 99.99999999% Cache Consistency

Flyweight Design Pattern

Flyweight Design Pattern

How Slack Built a System That Handles 10+ Billion Messages

How Slack Built a System That Handles 10+ Billion Messages

Paxos: The Democracy of Distributed Systems

Paxos: The Democracy of Distributed Systems

Write-Ahead Log: The Golden Rule of Durable Systems

Write-Ahead Log: The Golden Rule of Durable Systems

Prototype Design Pattern

Prototype Design Pattern

Distributed Counter System Design

Distributed Counter System Design

How Stripe Prevents Double Payments

How Stripe Prevents Double Payments

GitHub Actions: CI/CD Automation Basics

GitHub Actions: CI/CD Automation Basics

55 Million Requests Per Second: Inside Cloudflare's Magic

55 Million Requests Per Second: Inside Cloudflare's Magic

Bridge Design Pattern

Bridge Design Pattern

How Uber Finds Nearby Drivers at 1 Million Requests per Second

How Uber Finds Nearby Drivers at 1 Million Requests per Second

The Complete Guide to k6 Load Testing

The Complete Guide to k6 Load Testing

WhatsApp's Scaling Secrets: A Deep Dive into System Design and Architecture

WhatsApp's Scaling Secrets: A Deep Dive into System Design and Architecture

Prompt Engineering Basics for Software Developers

Prompt Engineering Basics for Software Developers

Git Command Line Basics: Essential Commands for Software Developers

Git Command Line Basics: Essential Commands for Software Developers

Taming Pipeline Chaos: How I Used GitLab APIs and GPT to Analyze Thousands of Failures and Boost Stability

Taming Pipeline Chaos: How I Used GitLab APIs and GPT to Analyze Thousands of Failures and Boost Stability

Iterator Design Pattern

Iterator Design Pattern

How to Exclude a Single Module from `sbt test` in a Multi-Module Scala Project

How to Exclude a Single Module from `sbt test` in a Multi-Module Scala Project

Mediator Design Pattern

Mediator Design Pattern

Chain of Responsibility Design Pattern

Chain of Responsibility Design Pattern

Composite Design Pattern

Composite Design Pattern

Abstract Factory Design Pattern

Abstract Factory Design Pattern

Template Method Design Pattern

Template Method Design Pattern

State Design Pattern

State Design Pattern

Command Design Pattern

Command Design Pattern

Proxy Design Pattern

Proxy Design Pattern

Facade Design Pattern

Facade Design Pattern

Adapter Design Pattern

Adapter Design Pattern

Builder Design Pattern

Builder Design Pattern

Strategy Design Pattern

Strategy Design Pattern

Factory Method Design Pattern

Factory Method Design Pattern

Singleton Design Pattern

Singleton Design Pattern

Github Actions for Android

Github Actions for Android

Pairing matrix for agile teams

Pairing matrix for agile teams

How to integrate GraphQL with Sitecore using JSS

How to integrate GraphQL with Sitecore using JSS

Flutter under the hood

Flutter under the hood

Monitoring individual queue in sidekiq

Monitoring individual queue in sidekiq

Why aren't you using binstubs yet?

Why aren't you using binstubs yet?

Offline Mode Of Android Apps

Offline Mode Of Android Apps

My upcoming talk in DroidConUK

My upcoming talk in DroidConUK

Integrating Sherlock with android apps

Integrating Sherlock with android apps

Why your android application needs awareness api

Why your android application needs awareness api

Java custom annotations

Java custom annotations

Prevent push on red build with the help of gocd_pre_push

Prevent push on red build with the help of gocd_pre_push

Conway's Game Of Life

Conway's Game Of Life

Notify when android device network status changes

Notify when android device network status changes

Observer Design Pattern

Observer Design Pattern

Filter Design Pattern

Filter Design Pattern

Ruby gem to fetch information from gocd as rich models

Ruby gem to fetch information from gocd as rich models

Android Data Binding

Android Data Binding

Android Custom Animations

Android Custom Animations

shell_session_update: command not found

shell_session_update: command not found

Android Draggable View

Android Draggable View

Android UI Design And Styling

Android UI Design And Styling

GIT revert multiple commits

GIT revert multiple commits

apkToJava - Gem to convert apk file to java code

apkToJava - Gem to convert apk file to java code

Android Padding vs Margin

Android Padding vs Margin

Android UI for beginners

Android UI for beginners

Decorator Design Pattern

Decorator Design Pattern

Junit Rules Vs Setup and TearDown

Junit Rules Vs Setup and TearDown

Android Build Process

Android Build Process

What happens when android screen rotates?

What happens when android screen rotates?

Is ruby monkey patching evil?

Is ruby monkey patching evil?

Android Instrumentation Testing Using Espresso

Android Instrumentation Testing Using Espresso

Testing Android Database

Testing Android Database

MVP in android

MVP in android

Gradient color in android

Gradient color in android

Tool to execute commands in multiple directories

Tool to execute commands in multiple directories

Writing a new programming language

Writing a new programming language

Print custom messages after executing git commands

Print custom messages after executing git commands

Cool tips for vim users

Cool tips for vim users

Schedule local notification in android

Schedule local notification in android

Add album cover to mp3 file

Add album cover to mp3 file

MediaMagic: Convert any media file into encoded string or vice-versa

MediaMagic: Convert any media file into encoded string or vice-versa

Closure in Ruby

Closure in Ruby

Android with sqlite database

Android with sqlite database

Basic configuration of VIM

Basic configuration of VIM

nokogiri ERROR Failed to build gem native extension on MAC

nokogiri ERROR Failed to build gem native extension on MAC

Cucumber and calabash for android app testing

Cucumber and calabash for android app testing

Vim modes - normal, insert and visual

Vim modes - normal, insert and visual

Set up automation using cucumber and capybara

Set up automation using cucumber and capybara

Instrumentation testing of list view

Instrumentation testing of list view