Do you know SixDegrees.com was the first social network site which allowed the user to create a profile and connect?
In a world of 7 billion people, it seems hard to believe that the Six Degrees of Separation theory contends that we are all connected to each other by six or fewer acquaintances.
For example, there are, at most, six people standing between you and Tom Cruise or President Obama (or Trump if you lean that way).
Going by the numbers, the idea looks pretty plausible.
Assume that you know 50 people or have 50 friends and these 50 friends of yours know 50 others who are not your friends, and so on.
The math says that in 6 steps you would be connected with 506, or 15.62 billion people.
Six Degrees of Separation Theory
In 1929, Hungarian author Frigyes Karinthy published a volume of short stories named Everything is Different.
In one of his stories titled Chains, he said that with growing communication and travel, the friendship network would grow irrespective of the distance between two humans.
And with a growing social network, the social distance would shrink immensely.
All the people on the planet could be connected to one another by 5 or fewer people.
This theory captivated millions of mathematicians, sociologists, and physicists and also laid the founding stone of the first online social network.
Soon several “small world” projects were conducted.
The small world experiment comprised experiments conducted by Stanley Milgram, examining the average path length for social networks of people in the United States.
These experiments suggested that humans are connected to each other through a network, connected to each other by the shortest path.
In 2005, Samy Kamkar wrote a small piece of code for his myspace account.
Whenever anyone visited Samy’s profile, it copied his picture and tag line on his home page saying “Samy is my hero” and also copied the code.
Within 20 hours, this code was on more than 1 million myspace user profiles. It is considered one of the fastest growing web viruses of all time.
Though mostly harmless, Samy was caught by the United States Secret Service and was prohibited from using the Internet for three years.
The point I am trying to make is that within a span of few hours, a simple XSS webworm was shared among more than 1 million users, proving that the world was getting smaller and further studies and research on small world projects need to be escalated.
The real breakthrough came with the college game of “Six degrees of Kevin Bacon” where college students linked other Hollywood co-stars to Kevin Bacon in six or fewer steps.
The huge volume of data collected in the game gave scientists and researchers immense information to process and proceed and gave them opportunities to prove the concept of six degrees of separation.
In 2011, Facebook and researchers at Cornell computed that the average separation across 721 million people using Facebook was only 3.74.
In their latest research published in February 2016, this number dropped down to 3.57, with more than 1.59 billion people active on Facebook.
On average, Facebook users are connected by an average of 2.9 to 4.2 degrees of separation. The image shows the average of each person.
Six Degrees of Separation Theory meaning analysis
In its research paper, Facebook mentions that this estimation was done using the Flajolet–Martin algorithm, which is used to find distinct elements in a stream of elements.
Suppose you assign an integer called Hash to each friend in a group (Read more about Hash Function here).
Approximately half of your friends will have even numbers or even hash, whose binary representation would be 0.
A quarter of them would have the number divisible by 4, giving the binary representation as 00. This means ½n people will have their hash or numbers ending with n zeros.
To track, you find the number with the maximum number of zeros. If there are n zeros, you can find C*2n unique numbers.
To calculate the average, you find the number with the maximum number of zeroes.
Use Bitwise OR operation on these numbers and then recursively do it for one set of friends, and then friends-of-friends, and their friends and so on to find the shortest path.
The result is amazing! It is just unbelievable how small the world is.
With a growing social network, the average separation and connection would soon reduce to possibly 2 to 3 degrees of separation.
And someday, a mail from The Prince of Somalia telling you that you have won the lottery might be actually true!
Till then, connect with best developers across the planet using first degree connections by building your profile on HackerEarth and participating in various programming challenges.
I Used AI to Build a "Simple Image Carousel" at VibeCodeArena. It Found 15+ Issues and Taught Me How to Fix Them.
My Learning Journey
I wanted to understand what separates working code from good code. So I used VibeCodeArena.ai to pick a problem statement where different LLMs produce code for the same prompt. Upon landing on the main page of VibeCodeArena, I could see different challenges. Since I was interested in an Image carousal application, I picked the challenge with the prompt "Make a simple image carousel that lets users click 'next' and 'previous' buttons to cycle through images."
Within seconds, I had code from multiple LLMs, including DeepSeek, Mistral, GPT, and Llama. Each code sample also had an objective evaluation score. I was pleasantly surprised to see so many solutions for the same problem. I picked gpt-oss-20b model from OpenAI. For this experiment, I wanted to focus on learning how to code better so either one of the LLMs could have worked. But VibeCodeArena can also be used to evaluate different LLMs to help make a decision about which model to use for what problem statement.
The model had produced a clean HTML, CSS, and JavaScript. The code looked professional. I could see the preview of the code by clicking on the render icon. It worked perfectly in my browser. The carousel was smooth, and the images loaded beautifully.
But was it actually good code?
I had no idea. That's when I decided to look at the evaluation metrics
What I Thought Was "Good Code"
A working image carousel with:
Clean, semantic HTML
Smooth CSS transitions
Keyboard navigation support
ARIA labels for accessibility
Error handling for failed images
It looked like something a senior developer would write. But I had questions:
Was it secure? Was it optimized? Would it scale? Were there better ways to structure it?
Without objective evaluation, I had no answers. So, I proceeded to look at the detailed evaluation metrics for this code
What VibeCodeArena's Evaluation Showed
The platform's objective evaluation revealed issues I never would have spotted:
Security Vulnerabilities (The Scary Ones)
No Content Security Policy (CSP): My carousel was wide open to XSS attacks. Anyone could inject malicious scripts through the image URLs or manipulate the DOM. VibeCodeArena flagged this immediately and recommended implementing CSP headers.
Missing Input Validation: The platform pointed out that while the code handles image errors, it doesn't validate or sanitize the image sources. A malicious actor could potentially exploit this.
Hardcoded Configuration: Image URLs and settings were hardcoded directly in the code. The platform recommended using environment variables instead - a best practice I completely overlooked.
SQL Injection Vulnerability Patterns: Even though this carousel doesn't use a database, the platform flagged coding patterns that could lead to SQL injection in similar contexts. This kind of forward-thinking analysis helps prevent copy-paste security disasters.
Performance Problems (The Silent Killers)
DOM Structure Depth (15 levels): VibeCodeArena measured my DOM at 15 levels deep. I had no idea. This creates unnecessary rendering overhead that would get worse as the carousel scales.
Expensive DOM Queries: The JavaScript was repeatedly querying the DOM without caching results. Under load, this would create performance bottlenecks I'd never notice in local testing.
Missing Performance Optimizations: The platform provided a checklist of optimizations I didn't even know existed:
Each of these seems minor, but together they compound into a poor user experience.
Code Quality Issues (The Technical Debt)
High Nesting Depth (4 levels): My JavaScript had logic nested 4 levels deep. VibeCodeArena flagged this as a maintainability concern and suggested flattening the logic.
Overly Specific CSS Selectors (depth: 9): My CSS had selectors 9 levels deep, making it brittle and hard to refactor. I thought I was being thorough; I was actually creating maintenance nightmares.
Code Duplication (7.9%): The platform detected nearly 8% code duplication across files. That's technical debt accumulating from day one.
Moderate Maintainability Index (67.5): While not terrible, the platform showed there's significant room for improvement in code maintainability.
Missing Best Practices (The Professional Touches)
The platform also flagged missing elements that separate hobby projects from professional code:
No 'use strict' directive in JavaScript
Missing package.json for dependency management
No test files
Missing README documentation
No .gitignore or version control setup
Could use functional array methods for cleaner code
Missing CSS animations for enhanced UX
The "Aha" Moment
Here's what hit me: I had no framework for evaluating code quality beyond "does it work?"
The carousel functioned. It was accessible. It had error handling. But I couldn't tell you if it was secure, optimized, or maintainable.
VibeCodeArena gave me that framework. It didn't just point out problems, it taught me what production-ready code looks like.
My New Workflow: The Learning Loop
This is when I discovered the real power of the platform. Here's my process now:
Step 1: Generate Code Using VibeCodeArena
I start with a prompt and let the AI generate the initial solution. This gives me a working baseline.
Step 2: Analyze Across Several Metrics
I can get comprehensive analysis across:
Security vulnerabilities
Performance/Efficiency issues
Performance optimization opportunities
Code Quality improvements
This is where I learn. Each issue includes explanation of why it matters and how to fix it.
Step 3: Click "Challenge" and Improve
Here's the game-changer: I click the "Challenge" button and start fixing the issues based on the suggestions. This turns passive reading into active learning.
Do I implement CSP headers correctly? Does flattening the nested logic actually improve readability? What happens when I add dns-prefetch hints?
I can even use AI to help improve my code. For this action, I can use from a list of several available models that don't need to be the same one that generated the code. This helps me to explore which models are good at what kind of tasks.
For my experiment, I decided to work on two suggestions provided by VibeCodeArena by preloading critical CSS/JS resources with <link rel="preload"> for faster rendering in index.html and by adding explicit width and height attributes to images to prevent layout shift in index.html. The code editor gave me change summary before I submitted by code for evaluation.
Step 4: Submit for Evaluation
After making improvements, I submit my code for evaluation. Now I see:
What actually improved (and by how much)
What new issues I might have introduced
Where I still have room to grow
Step 5: Hey, I Can Beat AI
My changes helped improve the performance metric of this simple code from 82% to 83% - Yay! But this was just one small change. I now believe that by acting upon multiple suggestions, I can easily improve the quality of the code that I write versus just relying on prompts.
Each improvement can move me up the leaderboard. I'm not just learning in isolation—I'm seeing how my solutions compare to other developers and AI models.
So, this is the loop: Generate → Analyze → Challenge → Improve → Measure → Repeat.
Every iteration makes me better at both evaluating AI code and writing better prompts.
What This Means for Learning to Code with AI
This experience taught me three critical lessons:
1. Working ≠ Good Code
AI models are incredible at generating code that functions. But "it works" tells you nothing about security, performance, or maintainability.
The gap between "functional" and "production-ready" is where real learning happens. VibeCodeArena makes that gap visible and teachable.
2. Improvement Requires Measurement
I used to iterate on code blindly: "This seems better... I think?"
Now I know exactly what improved. When I flatten nested logic, I see the maintainability index go up. When I add CSP headers, I see security scores improve. When I optimize selectors, I see performance gains.
Measurement transforms vague improvement into concrete progress.
3. Competition Accelerates Learning
The leaderboard changed everything for me. I'm not just trying to write "good enough" code—I'm trying to climb past other developers and even beat the AI models.
This competitive element keeps me pushing to learn one more optimization, fix one more issue, implement one more best practice.
How the Platform Helps Me Become A Better Programmer
VibeCodeArena isn't just an evaluation tool—it's a structured learning environment. Here's what makes it effective:
Immediate Feedback: I see issues the moment I submit code, not weeks later in code review.
Contextual Education: Each issue comes with explanation and guidance. I learn why something matters, not just that it's wrong.
Iterative Improvement: The "Challenge" button transforms evaluation into action. I learn by doing, not just reading.
Measurable Progress: I can track my improvement over time—both in code quality scores and leaderboard position.
Comparative Learning: Seeing how my solutions stack up against others shows me what's possible and motivates me to reach higher.
What I've Learned So Far
Through this iterative process, I've gained practical knowledge I never would have developed just reading documentation:
How to implement Content Security Policy correctly
Why DOM depth matters for rendering performance
What CSS containment does and when to use it
How to structure code for better maintainability
Which performance optimizations actually make a difference
Each "Challenge" cycle teaches me something new. And because I'm measuring the impact, I know what actually works.
The Bottom Line
AI coding tools are incredible for generating starting points. But they don't produce high quality code and can't teach you what good code looks like or how to improve it.
✓ Objective analysis that shows you what's actually wrong ✓ Educational feedback that explains why it matters ✓ A "Challenge" system that turns learning into action ✓ Measurable improvement tracking so you know what works ✓ Competitive motivation through leaderboards
My "simple image carousel" taught me an important lesson: The real skill isn't generating code with AI. It's knowing how to evaluate it, improve it, and learn from the process.
The future of AI-assisted development isn't just about prompting better. It's about developing the judgment to make AI-generated code production-ready. That requires structured learning, objective feedback, and iterative improvement. And that's exactly what VibeCodeArena delivers.
Here is a link to the code for the image carousal I used for my learning journey
Revolutionizing Mobile Talent Hiring: The HackerEarth Advantage
The demand for mobile applications is exploding, but finding and verifying developers with proven, real-world skills is more difficult than ever. Traditional assessment methods often fall short, failing to replicate the complexities of modern mobile development.
Introducing a New Era in Mobile Assessment
At HackerEarth, we're closing this critical gap with two groundbreaking features, seamlessly integrated into our Full Stack IDE:
Now, assess mobile developers in their true native environment. Our enhanced Full Stack questions now offer full support for both Java and Kotlin, the core languages powering the Android ecosystem. This allows you to evaluate candidates on authentic, real-world app development skills, moving beyond theoretical knowledge to practical application.
Say goodbye to setup drama and tool-switching. Candidates can now build, test, and debug Android and React Native applications directly within the browser-based IDE. This seamless, in-browser experience provides a true-to-life evaluation, saving valuable time for both candidates and your hiring team.
Assess the Skills That Truly Matter
With native Android support, your assessments can now delve into a candidate's ability to write clean, efficient, and functional code in the languages professional developers use daily. Kotlin's rapid adoption makes proficiency in it a key indicator of a forward-thinking candidate ready for modern mobile development.
This chart illustrates the importance of assessing proficiency in both modern (Kotlin) and established (Java) codebases.
Streamlining Your Assessment Workflow
The integrated mobile emulator fundamentally transforms the assessment process. By eliminating the friction of fragmented toolchains and complex local setups, we enable a faster, more effective evaluation and a superior candidate experience.
Visualize the stark difference: Our streamlined workflow removes technical hurdles, allowing candidates to focus purely on demonstrating their coding and problem-solving abilities.
Quantifiable Impact on Hiring Success
A seamless and authentic assessment environment isn't just a convenience, it's a powerful catalyst for efficiency and better hiring outcomes. By removing technical barriers, candidates can focus entirely on demonstrating their skills, leading to faster submissions and higher-quality signals for your recruiters and hiring managers.
A Better Experience for Everyone
Our new features are meticulously designed to benefit the entire hiring ecosystem:
For Recruiters & Hiring Managers:
Accurately assess real-world development skills.
Gain deeper insights into candidate proficiency.
Hire with greater confidence and speed.
Reduce candidate drop-off from technical friction.
For Candidates:
Enjoy a seamless, efficient assessment experience.
No need to switch between different tools or manage complex setups.
Focus purely on showcasing skills, not environment configurations.
Work in a powerful, professional-grade IDE.
Unlock a New Era of Mobile Talent Assessment
Stop guessing and start hiring the best mobile developers with confidence. Explore how HackerEarth can transform your tech recruiting.
Vibe coding is a new method of using natural language prompts and AI tools to generate code. I have seen firsthand that this change makes software more accessible to everyone. In the past, being able to produce functional code was a strong advantage for developers. Today, when code is produced quickly through AI, the true value lies in designing, refining, and optimizing systems. Our role now goes beyond writing code; we must also ensure that our systems remain efficient and reliable.
From Machine Language to Natural Language
I recall the early days when every line of code was written manually. We progressed from machine language to high-level programming, and now we are beginning to interact with our tools using natural language. This development does not only increase speed but also changes how we approach problem solving. Product managers can now create working demos in hours instead of weeks, and founders have a clearer way of pitching their ideas with functional prototypes. It is important for us to rethink our role as developers and focus on architecture and system design rather than simply on typing c
The Promise and the Pitfalls
I have experienced both sides of vibe coding. In cases where the goal was to build a quick prototype or a simple internal tool, AI-generated code provided impressive results. Teams have been able to test new ideas and validate concepts much faster. However, when it comes to more complex systems that require careful planning and attention to detail, the output from AI can be problematic. I have seen situations where AI produces large volumes of code that become difficult to manage without significant human intervention.
AI-powered coding tools like GitHub Copilot and AWS’s Q Developer have demonstrated significant productivity gains. For instance, at the National Australia Bank, it’s reported that half of the production code is generated by Q Developer, allowing developers to focus on higher-level problem-solving . Similarly, platforms like Lovable or Hostinger Horizons enable non-coders to build viable tech businesses using natural language prompts, contributing to a shift where AI-generated code reduces the need for large engineering teams. However, there are challenges. AI-generated code can sometimes be verbose or lack the architectural discipline required for complex systems. While AI can rapidly produce prototypes or simple utilities, building large-scale systems still necessitates experienced engineers to refine and optimize the code.
The Economic Impact
The democratization of code generation is altering the economic landscape of software development. As AI tools become more prevalent, the value of average coding skills may diminish, potentially affecting salaries for entry-level positions. Conversely, developers who excel in system design, architecture, and optimization are likely to see increased demand and compensation. Seizing the Opportunity
Vibe coding is most beneficial in areas such as rapid prototyping and building simple applications or internal tools. It frees up valuable time that we can then invest in higher-level tasks such as system architecture, security, and user experience. When used in the right context, AI becomes a helpful partner that accelerates the development process without replacing the need for skilled engineers.
This is revolutionizing our craft, much like the shift from machine language to assembly to high-level languages did in the past. AI can churn out code at lightning speed, but remember, “Any fool can write code that a computer can understand. Good programmers write code that humans can understand.” Use AI for rapid prototyping, but it’s your expertise that transforms raw output into robust, scalable software. By honing our skills in design and architecture, we ensure our work remains impactful and enduring. Let’s continue to learn, adapt, and build software that stands the test of time.
Ready to streamline your recruitment process? Get a free demo to explore cutting-edge solutions and resources for your hiring needs.
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