Common Mistakes Just-Starting Programmers Make

📌 Common bugs · what-is-coding✍️ Written by Mark Sullivan📅 Reviewed 2026-04-15⏱ ~7 min read

Five "before you write any code" mistakes that derail beginners in week one.

Bee mascot
From Bee: "I see this exact bug in beginners every week. Read it once, and you'll spot it on yourself before it bites."
#1

Spending a week on setup before writing a single line

txt
Install Node. Configure ESLint. Set up Prettier. Pick an editor theme. Don't actually code.
⚠️
Why this happens
Setup paralysis. By the time you're "ready," your motivation is gone.
The fix
Open our playground. Write 10 lines. Then install things if you need them.
#2

Switching languages every week

txt
Mon: Python. Tue: JS. Wed: Rust because Twitter said so. Thu: starting over.
⚠️
Why this happens
Concepts transfer; syntax memory doesn't. Hopping resets your muscle memory weekly.
The fix
Pick one. Stay 30 days. Then evaluate. Boredom isn't the same as readiness.
#3

Memorizing instead of building

txt
Re-reading the same syntax sheet for 3 hours, never typing.
⚠️
Why this happens
Reading without doing creates the illusion of progress without the skill.
The fix
Aim for 70% writing, 30% reading once you have the basics. Type every example yourself.
#4

Copying from tutorials without understanding

txt
Build a tutorial app. Can't modify it. Tutorial hell.
⚠️
Why this happens
Pattern matching looks like learning but isn't. The first time something differs, you're stuck.
The fix
After every tutorial, rebuild the same thing without looking. Even 80% from memory beats 100% from copy.
#5

Avoiding errors instead of reading them

txt
See red text. Panic. Try random fixes. Errors get worse.
⚠️
Why this happens
The error usually tells you exactly what to fix.
The fix
Read errors. Slowly. They're documentation, not threats.
💡
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M
Mark Sullivan
Lead writer · 8 yrs full-stack

Mark started coding in 2017 after switching from financial analysis. She's built production systems in Python (Django) and JavaScript (Node + React) at two startups, and has taught intro programming at his local community college since 2022. He owns the curriculum for variables, functions, conditionals, and loops on this site. More about Mark →