Swizec Teller - a geek with a hatswizec.com

    MacOS filesystem's annoying little quirk

    The filesystem on your shiny expensive laptop is case insensitive. Did you know?

    I know, but I always forget. Your code looks like it works. It compiles, the tests all pass, you can run it, and you can play with it. Then you push to production, and it breaks. Sometimes in the build step, sometimes as late as runtime, but inevitably, it breaks.

    This is the one situation where I envy all my friends who work on Linux, maybe even Windows. They've never had to deal with this shit.

    MacOS → case insensitive. Linux → case sensitive.

    You thought working with JavaScript would get you away from these low level concerns, didn't you? Yeah, me too.

    Here's why you should care. Watch this gif:

    Make a file called ALLCAPS.js, read it as allcaps.js, and MacOS doesn't even bat an eye. Then you put the same code on a Linux server, and all hell breaks loose.

    ¯\_(ツ)_

    This quirk shows up when you least expect it – innocent camelCAse typos. Your code works, git status says everything's merged, and the typo goes unnoticed until it's too late.

    I'm too embarrassed to say how much time I've lost to this quirk over the years. So I won't.

    Here's to hoping I'll stop forgetting now. ?

    Did you enjoy this article?

    Published on August 23rd, 2016 in Opinions, Personal, Technical,

    Learned something new?
    Want to become an expert?

    Here's how it works 👇

    Leave your email and I'll send you thoughtfully written emails every week about React, JavaScript, and your career. Lessons learned over 20 years in the industry working with companies ranging from tiny startups to Fortune5 behemoths.

    Join Swizec's Newsletter

    And get thoughtful letters 💌 on mindsets, tactics, and technical skills for your career. Real lessons from building production software. No bullshit.

    "Man, love your simple writing! Yours is the only newsletter I open and only blog that I give a fuck to read & scroll till the end. And wow always take away lessons with me. Inspiring! And very relatable. 👌"

    ~ Ashish Kumar

    Join 15,161+ engineers just like you already growing their careers with my emails, workshops, books, and courses.

    ⭐️⭐️⭐️⭐️✨
    4.5 stars average rating

    Have a burning question that you think I can answer? Hit me up on twitter and I'll do my best.

    Who am I and who do I help? I'm Swizec Teller and I turn coders into engineers with "Raw and honest from the heart!" writing. No bullshit. Real insights into the career and skills of a modern software engineer.

    Want to become a true senior engineer? Take ownership, have autonomy, and be a force multiplier on your team. The Senior Engineer Mindset ebook can help 👉 swizec.com/senior-mindset. These are the shifts in mindset that unlocked my career.

    Curious about Serverless and the modern backend? Check out Serverless Handbook, for frontend engineers 👉 ServerlessHandbook.dev

    Want to Stop copy pasting D3 examples and create data visualizations of your own? Learn how to build scalable dataviz React components your whole team can understand with React for Data Visualization

    Want to get my best emails on JavaScript, React, Serverless, Fullstack Web, or Indie Hacking? Check out swizec.com/collections

    Want to brush up on modern JavaScript syntax? Check out my interactive cheatsheet: es6cheatsheet.com

    Did someone amazing share this letter with you? Wonderful! You can sign up for my weekly letters for software engineers on their path to greatness, here: swizec.com/blog

    Want to brush up on your modern JavaScript syntax? Check out my interactive cheatsheet: es6cheatsheet.com

    By the way, just in case no one has told you it yet today: I love and appreciate you for who you are ❤️

    Created by Swizec with ❤️