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whatyouhide's profile
Andrea Leopardi
Andrea Leopardi
Andrea Leopardi
@whatyouhide

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Andrea Leopardi

@whatyouhide

Member of the @elixirlang core team, professional nitpicker, speaker, developer advocate, software architect.

L'Aquila, Italy
andrealeopardi.com
Joined April 2014

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    Andrea Leopardi‏ @whatyouhide Sep 16

    I hate the "code should be self-explanatory so no comments" thing. I love comments. However, *how many* comments also depends on the language - in Elixir I write less because I feel it's expressive. I would write a ton of comments in C or a new language.

    6:15 AM - 16 Sep 2018
    • 1 Retweet
    • 26 Likes
    • 🇦🇷 Norman Perrin Andrey Chernykh Matteo Brancaleoni శరత్ చంద్ర Pedro Gaspar Maciej Kaszubowski Dave Lucia Dario Maiocchi 𝚁𝚊𝚏𝚊𝚎𝚕 𝙰𝚕𝚋𝚞𝚚𝚞𝚎𝚛𝚚𝚞𝚎
    6 replies 1 retweet 26 likes
      1. Andrea Leopardi‏ @whatyouhide Sep 16

        Because of this, I write more comments than I feel necessary in Elixir as well: I am proficient in it but many of the readers of my code might not be. Comments don't hurt so don't be cheap with them 🙃

        6 replies 1 retweet 14 likes
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      1. New conversation
      2. Martin Gausby‏ @gausby Sep 16
        Replying to @whatyouhide

        I once got told to remove my comments in a code review back when I worked with JavaScript, the reason: the code should be self-explanatory. A part of me died that day.

        1 reply 0 retweets 3 likes
      3. Theo Andersen Carton‏ @TheoAndersen Sep 16
        Replying to @gausby @whatyouhide

        IMO try not to comment the ‘what’ unless the code is hard to understand (maybe work more on it, m extract something out). But do comment the ‘why’. Ex this annoys me a little: // adds one to i i+=2

        1 reply 0 retweets 1 like
      4. Martin Gausby‏ @gausby Sep 16
        Replying to @TheoAndersen @whatyouhide

        I think blatantly obvious comments annoy everybody—especially when they are wrong. I like to comment algorithms…because I want to be able to read it three months later; and also edge cases get a comment because they might seem weird at a first glance.

        1 reply 0 retweets 1 like
      5. Andrea Leopardi‏ @whatyouhide Sep 16
        Replying to @gausby @TheoAndersen

        this is a good summary. Obvious is bad in most cases. Commenting the why of code, algorithms, domain knowledge, edge cases, "hacks", is fundamental to write understandable and maintenable software in my opinion.

        0 replies 0 retweets 2 likes
      6. End of conversation
      1. New conversation
      2. Jack Marchant‏ @jackmarchant10 Sep 17
        Replying to @whatyouhide

        Do you write any doctests in addition to or instead of documentation?

        1 reply 0 retweets 0 likes
      3. Andrea Leopardi‏ @whatyouhide Sep 17
        Replying to @jackmarchant10

        doctests and documentantion have little to do with comments. Comments are aimed at explaining how code works and why it works that way, documentation is there for telling folks how to use a piece of code. Doctests are documentation tested for correctness. Does it make sense?

        0 replies 0 retweets 0 likes
      4. End of conversation
      1. Jared Smith‏ @sublimecoder Sep 16
        Replying to @whatyouhide

        I tend to use comments sparingly, and only when I have done something unusual for a very specific purpose which would not be readily apparent.

        0 replies 0 retweets 1 like
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      2. Todd Pickell‏ @tapickell Sep 16
        Replying to @whatyouhide

        Instead of comments why not add a doctest. A comment that can fail if the code changes. @Adkron #justathought

        2 replies 0 retweets 0 likes
      3. Amos King‏ @Adkron Sep 16
        Replying to @tapickell @whatyouhide

        I tend to keep my comments in my commit messages because they change when the code changes. If commit messages were useful more people would look there any way. Doctests are a great alternative but don’t say everything that is often needed.

        0 replies 0 retweets 0 likes
      4. End of conversation
      1. New conversation
      2. Ken Sobieski‏ @ISobiWan Sep 16
        Replying to @whatyouhide

        Will agree to disagree. If it needs a comment, it should be a well-named function, even if (especially if?) it's an elegant, single-line solution like a .Net linq statement.

        2 replies 0 retweets 0 likes
      3. Ken Sobieski‏ @ISobiWan Sep 16
        Replying to @ISobiWan @whatyouhide

        Then write a test for it and confirm the naming is correct.

        0 replies 0 retweets 0 likes
      4. End of conversation

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