7 Jun 2025
Today’s dev lesson:
While working on my project, I finally realized the big mistake I was making…
I was calling setState() inside an - if condition 😵💫
No wonder my app was acting weird.
One step closer to cleaner code! 💪
#ReactJS #DevLife #CodeMistakes #100DaysOfCode
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⚠️ **Watch Out for These Variable Mistakes!**
Even pros make errors! Here are some common pitfalls:
1. **Not declaring variables:** Avoid using variables that weren’t declared.
2. **Reassigning constants:** Once set, `const` cannot be changed!
3. **Misnaming:** Typos lead to headaches!
🚨 *Have you ever made any of these mistakes? Let’s learn together!* #JavaScriptErrors #CodeMistakes #LearnToCode
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18 Jul 2017
Another programming lesson learned: if you give people the opportunity, they *will* put emojis in every input field. #codemistakes
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22 Apr 2017
I file all of mine under #codemistakes and somehow I'm really the only person using the tag!! come on, people! x.com/gesa/status/8558588525…
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24 Jan 2017
It took several days to see this mistake. I'm having fun here writing code and using basic 7th grade geometry. #codemistakes
ALT Some code that calls into a quadtree passing in an data object with x and y coordinates and width and height. The width is calculated by subtracting the topmost y coordinate from the bottom most. The height is done similarly wrong. Ugh.
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8 Jun 2016
I accidentally wrote a 20 line python script that consumed all 128GB of ram on this machine. oops. #codemistakes
ALT still of ron burgundy from anchorman with the caption "I'm not even that mad, that's amazing."
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9 May 2016
love @ra's talk about highlighting failures for the benefit of students. if we can, we should all highlight our #codemistakes! #bangbangcon
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31 Mar 2016
@lindseybieda yep. I've thought about an account to post my #codemistakes and even my programming search history. to show newbies how it is.
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8 Oct 2015
I wrote == when I meant != and my code deleted a cache and now I have to rebuild a dozen things. lol. #codemistakes
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8 Jun 2015
I always ALWAYS forget how to concatenate arrays in Python. concat, no. push, no. update?? no. It's self.extend() #codemistakes
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31 Dec 2014
How is #codemistakes an empty tag? What? Are we ~that~ infallible? We give the wrong impression of our skill and forget how art's our nature
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31 Dec 2014
I'm gonna post more of my #codemistakes for the sake of students. Here's me forgetting to specify a range step: oops
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