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cmuratori's profile
Casey Muratori
Casey Muratori
Casey Muratori
@cmuratori

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Casey Muratori

@cmuratori

I'm worried that the baby thinks people can't change.

Seattle
caseymuratori.com
Joined March 2009

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    1. Forbes Lindesay‏ @ForbesLindesay 27 Apr 2020
      Replying to @cmuratori

      The key thing you're missing is that lines of code != complexity of problem. This repository frequently gets people submitting changes that they think are perf improvements or simplifications, but that actually introduce bugs.

      2 replies 0 retweets 2 likes
    2. Forbes Lindesay‏ @ForbesLindesay 27 Apr 2020
      Replying to @ForbesLindesay @cmuratori

      It also has a type definition that has gone through 3 iterations to get to the right point. Many developers have contributed to building this into something you can rely on. If you build it yourself, you have to discover all the edge cases yourself.

      2 replies 0 retweets 2 likes
    3. Doug Orleans‏ @DougOrleans 27 Apr 2020
      Replying to @ForbesLindesay @cmuratori

      It's kind of absurd the amount of effort that goes into static type checking compared to the value of catching the kinds of bugs it can catch.

      1 reply 0 retweets 0 likes
    4. Forbes Lindesay‏ @ForbesLindesay 27 Apr 2020
      Replying to @DougOrleans @cmuratori

      It’s also about productivity, especially when it comes to refactoring and on boarding new team members. The value it pays back in those areas is incalculably huge

      2 replies 0 retweets 0 likes
    5. Doug Orleans‏ @DougOrleans 27 Apr 2020
      Replying to @ForbesLindesay @cmuratori

      Good test coverage gives the same benefits, plus more...

      1 reply 0 retweets 0 likes
    6. Forbes Lindesay‏ @ForbesLindesay 27 Apr 2020
      Replying to @DougOrleans @cmuratori

      It categorically does not. When I rename a method I get an instant list from TypeScript of every line that breaks. As a new dev I can glance at the header of a fn and see what types it takes and returns without reading the implementation. Tests do neither of these.

      1 reply 0 retweets 1 like
    7. Forbes Lindesay‏ @ForbesLindesay 27 Apr 2020
      Replying to @ForbesLindesay @DougOrleans @cmuratori

      Tests are still super important, but as the saying goes: “write tests, not too many, mostly integration” a lot of unit testing work becomes unnecessary with good strong types

      2 replies 0 retweets 0 likes
    8. Forbes Lindesay‏ @ForbesLindesay 27 Apr 2020
      Replying to @ForbesLindesay @DougOrleans @cmuratori

      It’s also worth noting that most of the benefits only come with a strong type system (TypeScript, Flow, Rust, Haskel) not with weak type systems (Java, C#). I moved to JavaScript largely to get away from weak type systems, but strong type systems are amazing.

      1 reply 0 retweets 0 likes
    9. Casey Muratori‏ @cmuratori 27 Apr 2020
      Replying to @ForbesLindesay @DougOrleans

      A) Java and C# are strongly typed. B) JavaScript is dynamically typed. I assume you meant TypeScript specifically when you say you "moved to JavaScript to get away from weak type systems"? and C) Unsubscribe

      1 reply 0 retweets 10 likes
    10. Garrett‏ @Nadagast 27 Apr 2020
      Replying to @cmuratori @ForbesLindesay @DougOrleans

      I think he meant a "strong type system" not "strongly typed" -- C# and Java are lacking a lot of safety compared to Typescript/Haskell/Rust

      2 replies 0 retweets 1 like
      Casey Muratori‏ @cmuratori 27 Apr 2020
      Replying to @Nadagast @ForbesLindesay @DougOrleans

      1) Those are not real terms. There is no definition of a "strong type system" nor a "weak" one. They are meaningless, other than perhaps telling you the author likes one implementation and not another. 2) I SAID UNSUBSCRIBE. I am blocking anyone who replies to this.

      6:14 PM - 27 Apr 2020
      • 5 Likes
      • Thomas Mattacchione ᜶ ᜀᜅ᜔ ᜉᜉᜇᜓᜈᜒ ᜶ Ivan Braidi Doug Orleans
      0 replies 0 retweets 5 likes

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