bcherny

35 ms·

1. 421.▲
   by bcherny 8y ago

   I’d love to see examples for those, maybe drop a comment when you run across a specific issue.
2. 422.▲
   by bcherny 8y ago

   Totally agreed. The reason to have variance annotations is the language becomes unusable without them. Thats why so many languages with object subtyping support them.
3. 423.▲
   by bcherny 8y ago

   Hey, that’s an interesting thought! If you go all the way and make it sound with variance annotations, banning asserts & under specified types, etc. then you end up with a language that sucks to use in practice. If you go to the other e
4. 424.▲
   by bcherny 8y ago

   What sorts of things do you have trouble expressing with the type system?
5. 425.▲
   by bcherny 8y ago

   Friends and family mostly. Also the food and weather are hard to beat.
6. 426.▲
   by bcherny 8y ago

   What's the $1M equivalent for the Bay Area?
7. 427.▲
   by bcherny 8y ago

   Check out Undux effects - they're exactly that. https://undux.org
8. 428.▲
   by bcherny 8y ago

   Yeah, I'm not sure what kinds of data Google might get from being a DNS resolver that it doesn't already get from people using Google Search. Maybe competitive analysis (like, to get rough real time numbers of people that use Bing
9. 429.▲
   by bcherny 8y ago

   I recall a project (out of MIT I think) that used category theory and knowledge mapping to discover isomorphism between the knowledge graphs of different fields like math, physics, and economics.
10. 430.▲
    by bcherny 9y ago

    It’s a good question. Practically speaking, no. The US has done some pretty Machiavellian stuff to kick out immigrants before (eg. See the Mexican expulsion in the 1930s). It’s hard to justify that kind of thing given the really limited har
11. 431.▲
    by bcherny 9y ago

    That’s true, but ostensibly you only use it in places where you expect nulls and don’t intend to debug anything. That’s why Smalltalk, C#, CoffeeScript, and probably JS and TS soon have null chaining.
12. 432.▲
    by bcherny 9y ago

    It’s certainly a statement about our society that we talk about who “deserves” and doesn’t deserve to be deported (not just you, but others and even NPR use that choice of words). As if being deported is a punishment - like prison - for tho
13. 433.▲
    by bcherny 9y ago

    This is a really neat idea, and is a lot more ergonomic than nulls or optionals in JS. Until optional chaining makes its way into the spec [0], this is the cleanest way I’ve seen to operate on maybe-null values. [0] https://githu
14. 434.▲
    by bcherny 9y ago

    And if you’re using TypeScript, theres also TSOption https://www.npmjs.com/package/tsoption
15. 435.▲
    by bcherny 9y ago

    If you want less boilerplate and type safety, consider Undux - https://github.com/bcherny/undux
16. 436.▲
    by bcherny 9y ago

    A bit buried - V8 also supports tracing DOM-related memory leaks (exposed in devtools)! https://v8project.blogspot.com/2018/03/tracing-js-dom.html?m...
17. 437.▲
    by bcherny 9y ago

    If FB (or any other app) could record your phone's mic without you knowing, that would be a GIANT security issue on Apple/Samsung/etc.'s part. As any app developer knows, you need to explicitly request permission to reco
18. 438.▲
    by bcherny 9y ago

    I mean, if you can trade your meat coupons for cash, why not just use cash in the first place?
19. 439.▲
    by bcherny 9y ago

    I mean, average portfolio size for Robinhood users is probably in the $1k-10k range. How much does your 22 year old cousin care whether she pays $325.60 or $325.62 for a share of TSLA? For individuals it’s negligible, but for the HFT firms
20. 440.▲
    by bcherny 9y ago

    Can you talk more about that? Are you saying those studies haven’t been replicated?
21. 441.▲
    by bcherny 9y ago

    This is a super interesting piece of behavioral economics in action. We know from Prize Linked Savings Accounts that people prefer a really small change of winning a lot to a really high chance of winning a little. [0] [1] > The new prog
22. 442.▲
    by bcherny 9y ago

    What about them?
23. 443.▲
    by bcherny 9y ago

    Could you explain for the uninitiated?
24. 444.▲
    Ask HN: Good Asciidoc editor for OS X?

    2 points by bcherny 9y ago|1 comments
25. 445.▲
    by bcherny 9y ago

    Great work Kevin, and everyone else involved in Long Now! For those who aren't familiar, Long Now is a non-profit dedicated to long term thinking (on 10,000+ year timescales).
26. 446.▲
    by bcherny 9y ago

    If you have some JavaScript code, it goes through a few phases as it's evaluated by your browser: 1. Parsing 2. JIT optimizing 3. Compilation to bytecode 4. Re-optimization as the program runs Steps 1 and 2 are expensive, and there are
27. 447.▲
    by bcherny 9y ago

    I've been thinking about this problem a lot lately: does there exist an isomorphism between high level languages, such that you can map their ASTs and type systems back and forth?
28. 448.▲
    by bcherny 9y ago

    Prepack is one of the coolest ideas to come out of FB OSS. The idea is to run your JS program as part of compilation, evaluating it as much as you can. Then take what's left in the heap and serialize it back to JS. Then ship that to br
29. 449.▲
    by bcherny 9y ago

    Note that TypeScript and Flow have implemented sum types since this post was published.
30. 450.▲
    by bcherny 9y ago

    Presumably, the point of using WASM and service workers is for performance, but I see no benchmarks. I also have trouble imagining that this actually improves performance, unless you’re doing all of your compute in the browser and it’s CPU