How to Read Other People’s Code (Developer Skill Guide) AshByte

Let me start with something uncomfortable…

The first time I opened someone else’s code, I didn’t understand anything.

Not because the code was bad.
Not because I was dumb.

But because…

Nobody teaches you how to read code.

Everyone teaches:

How to write code
How to build projects
How to solve problems

But reading code? That’s a completely different skill.

And the moment you start working on real projects, open-source, or even team collaboration — you realize:

Reading code is more important than writing code.

So in this article, I’ll show you how to read other people’s code effectively, based on real struggles, mistakes, and what actually works in real development.

Why Reading Code is a Superpower

Let’s be real…

You won’t always write everything from scratch.

You’ll:

Work on existing projects
Debug someone else’s logic
Read open-source code
Join teams

If you can’t read code:

You’ll feel lost
You’ll waste time
You’ll depend on others

If you can read code well:

You learn faster
You debug faster
You grow faster

It’s literally a multiplier skill.

The Biggest Problem Beginners Face

Most beginners open code like this:

Start reading from top
Try to understand every line
Get confused
Quit

I did the same.

And honestly… it doesn’t work.

Because:

Code is not meant to be read line-by-line like a book.

It’s meant to be explored.

My Experience (This Was Frustrating)

I remember opening a GitHub project once.

10 folders
50+ files
Unknown structure

I tried to understand everything at once.

After 20 minutes:
=> Brain overloaded
=> Closed the tab

Then later I tried a different approach.

Instead of reading everything, I asked:

“What does this project actually do?”

That changed everything.

Mistakes I Made

Let’s save you from these:

1. Trying to understand everything at once

Impossible. Don’t do it.

2. Reading line-by-line

You’ll lose context.

3. Ignoring project structure

Structure tells the story.

4. Not running the code

Big mistake. Always run it.

What I Learned

Start with the big picture
Focus on flow, not syntax
Ignore small details initially
Learn by tracing execution

Step-by-Step: How to Read Other People’s Code

This is the real part. Follow this.

Start With the Purpose (What Does It Do?)

Before opening files, ask:

What problem does this project solve?

Check:

README file
Project description
Demo (if available)

Look at Folder Structure

This is underrated.

Structure gives you:

Architecture
Separation of logic
Flow

Example:

src/
controllers/
services/
models/
routes/

Even without reading code, you know:
It’s backend structured project

Find the Entry Point

Every project has a starting point.

Examples:

index.js
app.js
main.py

Start there.

Trace the Flow (Most Important Skill)

Instead of reading everything…

Follow execution.

Example:

Route → Controller → Service → Database

Ask:

Where does this function go next?
What calls this function?

Ignore What You Don’t Understand (At First)

This is important.

You don’t need to understand:

Every line
Every function
Every syntax

Focus on flow first

Details later.

Use Logs and Console

Add logs.

Seriously.

console.log(“Reached here”);

Helps you track execution
Makes understanding easier

Break Code Into Chunks

Don’t read entire file.

Read:

One function
One module
One feature

Small chunks = better clarity

Google + AI Is Your Friend

When stuck:

Search concept
Ask AI
Check documentation

Don’t stay stuck for too long

Real Example (Simple Flow)

Let’s say you see this:

JavaScript Code:

app.get(“/users”, getUsers);

Now:

Go to getUsers
See what it does
Follow next function

That’s how you navigate

Real Advice (From Experience)

Stop trying to “understand everything”.

Instead:
Try to “understand how things connect”

That’s the real skill.

My Experience (When It Finally Clicked)

At one point, I stopped focusing on code.

I started focusing on flow.

Instead of:

“What is this line doing?”

I asked:

“What is happening from request to response?”

Suddenly:

Everything made sense
Code felt simpler
Confidence increased

Tools That Help You Read Code Better

Use these:

1. VS Code Features

Go to definition
Find references
Search

2. Debugger

Step-by-step execution

3. GitHub

Read commits and changes

Practice Strategy (Very Important)

If you want to improve:

Do this daily:

Pick one GitHub project
Spend 20–30 minutes
Understand one feature

Not entire project

Consistency > intensity

Why This Skill Matters in Career

In real jobs:

You work on existing codebases
You fix bugs in others’ code
You collaborate

Nobody will say:
“Write everything from scratch”

They’ll say:
“Understand this and improve it”

What Most Developers Do Wrong

They focus only on writing code.

But top developers:
Spend more time reading than writing

My Thoughts

Here’s the truth:

Reading code feels hard in the beginning.

But once you get it…

It becomes your biggest advantage