Skip to content
By using Twitter’s services you agree to our Cookies Use. We and our partners operate globally and use cookies, including for analytics, personalisation, and ads.

This is the legacy version of twitter.com. We will be shutting it down on June 1, 2020. Please switch to a supported browser, or disable the extension which masks your browser. You can see a list of supported browsers in our Help Center.

  • Home Home Home, current page.
  • About

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @
  • Language: English
    • Bahasa Indonesia
    • Bahasa Melayu
    • Català
    • Čeština
    • Dansk
    • Deutsch
    • English UK
    • Español
    • Filipino
    • Français
    • Hrvatski
    • Italiano
    • Magyar
    • Nederlands
    • Norsk
    • Polski
    • Português
    • Română
    • Slovenčina
    • Suomi
    • Svenska
    • Tiếng Việt
    • Türkçe
    • Ελληνικά
    • Български език
    • Русский
    • Српски
    • Українська мова
    • עִבְרִית
    • العربية
    • فارسی
    • मराठी
    • हिन्दी
    • বাংলা
    • ગુજરાતી
    • தமிழ்
    • ಕನ್ನಡ
    • ภาษาไทย
    • 한국어
    • 日本語
    • 简体中文
    • 繁體中文
  • Have an account? Log in
    Have an account?
    · Forgot password?

    New to Twitter?
    Sign up
pcwalton's profile
Patrick Walton
Patrick Walton
Patrick Walton
@pcwalton

Tweets

Patrick Walton

@pcwalton

Research engineer at Mozilla

San Francisco, CA
pcwalton.github.io
Joined November 2009

Tweets

  • © 2020 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • Imprint
  • Cookies
  • Ads info
Dismiss
Previous
Next

Go to a person's profile

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @

Promote this Tweet

Block

  • Tweet with a location

    You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more

    Your lists

    Create a new list


    Under 100 characters, optional

    Privacy

    Copy link to Tweet

    Embed this Tweet

    Embed this Video

    Add this Tweet to your website by copying the code below. Learn more

    Add this video to your website by copying the code below. Learn more

    Hmm, there was a problem reaching the server.

    By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.

    Preview

    Why you're seeing this ad

    Log in to Twitter

    · Forgot password?
    Don't have an account? Sign up »

    Sign up for Twitter

    Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

    Sign up
    Have an account? Log in »

    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
    » See SMS short codes for other countries

    Confirmation

     

    Welcome home!

    This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.

    Tweets not working for you?

    Hover over the profile pic and click the Following button to unfollow any account.

    Say a lot with a little

    When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.

    Spread the word

    The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.

    Join the conversation

    Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.

    Learn the latest

    Get instant insight into what people are talking about now.

    Get more of what you love

    Follow more accounts to get instant updates about topics you care about.

    Find what's happening

    See the latest conversations about any topic instantly.

    Never miss a Moment

    Catch up instantly on the best stories happening as they unfold.

    Patrick Walton‏ @pcwalton 29 Apr 2019
    • Report Tweet
    • Report NetzDG Violation

    You don't statically have to try to prevent every type of error in Rust. Really! If you're tying yourself in knots with the type system, it's OK to just accept some failure modes. The type system is a tool that's there to help you if you want it, not a way of life.

    11:54 AM - 29 Apr 2019
    • 26 Retweets
    • 189 Likes
    • Irbis Labs Kishor Tungal Xiaofan Hu Random Firefox User puffybsd Wesley Moore Daniel Bechaz Seyi Ogunyemi Dmitry Kalyanov
    9 replies 26 retweets 189 likes
      1. New conversation
      2. Jochen Bedersdorfer‏ @beders 30 Apr 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @pcwalton @BrendanEich

        Thanks for this. It is just not feasible to prevent all illegal states in a system through types. For one: it is too costly and only very few customers are willing to pay for systems that are correct in the strict mathematical sense.

        1 reply 0 retweets 2 likes
      3. Jochen Bedersdorfer‏ @beders 30 Apr 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @beders @pcwalton @BrendanEich

        And second: are you still solving the customer’s problem? Or are you hunting for some mythical unicorn? Remember: Change is the only constant. Better design your system for that

        0 replies 0 retweets 2 likes
      4. End of conversation
      1. Satoshi Nakadashi‏ @nucknyan 29 Apr 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @pcwalton

        Ignore type purists, make cool things with good tools! ✊

        0 replies 0 retweets 3 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. InsanityBit‏ @InsanityBit 29 Apr 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @pcwalton

        Definitely. Defensive programming has limitations. Take a step back, assume failure, figure out what that looks like. Avoiding bugs is important, but assuming bugs is critical.

        0 replies 0 retweets 1 like
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. Michael S‏ @mschuresko 29 Apr 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @pcwalton

        Thank you. You just helped me win an argument I was having with myself.

        0 replies 0 retweets 1 like
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. Tony “Abolish ICE” Arcieri  🦀‏ @bascule 29 Apr 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @pcwalton

        In the words of the late, great @joeerl: “Let it fail”

        0 replies 0 retweets 1 like
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. New conversation
      2. Pascal Precht‏ @PascalPrecht 29 Apr 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @pcwalton

        Wonder where to draw the line then... Are you saying it's okay if a program panics in some cases?

        1 reply 0 retweets 0 likes
      3. simple complex Lie algebra‏ @sl2c 8 May 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @PascalPrecht @pcwalton

        simple complex Lie algebra Retweeted Tony “Abolish ICE” Arcieri  🦀

        https://twitter.com/bascule/status/1122983393212411904?s=19 …

        simple complex Lie algebra added,

        Tony “Abolish ICE” Arcieri  🦀 @bascule
        Replying to @pcwalton
        In the words of the late, great @joeerl: “Let it fail”
        0 replies 0 retweets 1 like
      4. End of conversation
      1. rozgo‏ @rozgo 29 Apr 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @pcwalton

        I know. But I can’t. I’ll probably have this condition checked.

        0 replies 0 retweets 0 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. kornel@mastodon.social‏ @kornelski 2 May 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @pcwalton

        Also a couple of macros is often better than a couple of layers of indirection of generic types.

        0 replies 0 retweets 0 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo

    Loading seems to be taking a while.

    Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

      Promoted Tweet

      false

      • © 2020 Twitter
      • About
      • Help Center
      • Terms
      • Privacy policy
      • Imprint
      • Cookies
      • Ads info