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Cake day: August 2nd, 2023

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  • Pipoca@lemmy.worldtoA Boring Dystopia@lemmy.worldNot hiding it
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    8 months ago

    The fathers of 44% of Israel were born in Israel, as of 2015. I doubt they have dual citizenship, just as most Americans don’t have dual citizenship to their grandparents and great grandparents countries of origin.

    Also, most Mizrahim and Sephardim these days are living in Israel, similarly to how most Ashkenazim are in the US. Even if an Israeli somehow has e.g. Iraqi, Iranian or Yemeni citizenship, moving back probably isn’t a safe idea. Morocco is probably safer, though.

    After the fall of the USSR, there was also a huge wave of Russian emigration to Israel. Given conscription for the war in Ukraine, moving back now might not be the best idea.


  • There’s a story in the Talmud about Hillel the elder, a rabbi who died in 10 CE:

    There was another incident involving one gentile who came before Shammai and said to Shammai: Convert me on condition that you teach me the entire Torah while I am standing on one foot. Shammai pushed him away with the builder’s cubit in his hand. This was a common measuring stick and Shammai was a builder by trade. The same gentile came before Hillel. He converted him and said to him: That which is hateful to you do not do to another; that is the entire Torah, and the rest is its interpretation. Go study.





  • And memory bugs are only a subset of bugs that can be exploited in a program. Pretending Rust means no more exploitation is stupid.

    This is facile.

    According to Microsoft, about 70% of security bugs they see are memory safety issues.

    Yes: if you introduce memory safety, there’s still those 30% of security bugs left. But, well, I’d rather worry about 30% of issues than 100%…

    Similarly, I use libraries that eliminate SQL injections unless you really go out of your way.




  • Symbols display with friendly string-y names in a number of languages. Clojure, for example, has a symbol type.

    And a number of languages display friendly strings for enumy things - Scala, Haskell, and Rust spring to mind.

    The problem with strings over enums with a nice debugging display is that the string type is too wide. Strings don’t tell you what values are valid, strings don’t catch typos at compile time, and they’re murder when refactoring.

    Clojure symbols are good at differentiation between symbolly things and strings, though they don’t catch typos.

    The other problem the article mentions is strings over a proper struct/adt/class hierarchy is that strings don’t really have any structure to them. Concatenating strings is brittle compared to building up an AST then rendering it at the end.

    Edit: autocorrect messed a few things up I didn’t catch.


  • Javascript is generally considered OOP, but classes weren’t widely available till 2017.

    Inheritance isn’t fundamental to OOP, and neither are interfaces. You can have a duck- typed OOP language without inheritance, although I don’t know of any off the top of my head.

    Honestly, the more fundamental thing about OOP is that it’s a programming style built around objects. Sometimes OO languages are class based, or duck typing based, etc. But you’ll always have your data carrying around it’s behavior at runtime.


  • keeping state (data) and behavior (functions) that operate on that state, together

    Importantly, that’s “together at runtime”, not in terms of code organization. One of the important things about an object is that it has dynamic dispatch. Your object is a pointer both to the data itself and to the implementation that works on that data.

    There’s a similar idea that’s a bit different that you see in Haskell, Scala, and Rust - what Haskell calls type classes. Rust gives it a veneer of OO syntax, but the semantics themselves are interestingly different.

    In particular, the key of type classes is keeping data and behavior separate. The language itself is responsible for automagically passing in the behavior.

    So in Scala, you could do something like

    def sum[A](values: List[A])(implicit numDict: Num[A]) = values.fold(numDict.+)(numDict.zero)
    

    Or

    def sum[A: Num](values: List[A]) = values.fold(_ + _)(zero)
    

    Given a Num typeclass that encapsulates numeric operations. There’s a few important differences:

    1. All of the items of that list have to be the same type of number - they’re all Ints or all Doubles or something

    2. It’s a list of primitive numbers and the implementation is kept separate - no need for boxing and unboxing.

    3. Even if that list is empty, you still have access to the implementation, so you can return a type-appropriate zero value

    4. Generic types can conditionally implement a typeclass. For example, you can make an Eq instance for List[A] if A has an Eq instance. So you can compare List[Int] for equality, but not List[Int => Int].


  • One poll this year found that almost one in three Americans say they may never retire. The majority of the nevers said they could not afford to give up a full-time job, especially when inflation was eating into an already measly Social Security cheque. But suppose you are one of the lucky ones who can choose to step aside. Should you do it? …

    But can anything truly replace the framework and buzz of being part of the action? You can have a packed diary devoid of deadlines, meetings and spreadsheets and flourish as a consumer of theatre matinees, art exhibitions and badminton lessons. Hobbies are all well and good for many. But for the extremely driven, they can feel pointless and even slightly embarrassing.

    That is because there is depth in being useful. And excitement, even in significantly lower doses than are typical earlier in a career, can act as an anti-ageing serum. Whenever Mr Armani is told to retire and enjoy the fruits of his labour, he replies “absolutely not”. Instead he is clearly energised by being involved in the running of the business day to day, signing off on every design, document and figure.

    Who exactly is this article being written for?

    Clearly, it’s not written towards anyone working the average job. It presupposes that your job must be the most fulfilling and useful thing you could do.

    It even calls out tech professionals as retiring early. But how many programmers can’t think of a more useful or fulfilling open source project to work on than what they do at their day job?



  • Yeah, projects also exist in the real world and practical considerations matter.

    The legacy C/C++ code base might slowly and strategically have components refactored into rust, or you might leave it.

    The C/C++ team might be interested in trying Rust, but have to code urgent projects in C/C++.

    In the same way that if you have a perfectly good felling axe and someone just invented the chain saw, you’re better off felling that tree with your axe than going into town, buying a chainsaw and figuring out how to use it. The axe isn’t really the right tool for the job anymore, but it still works.


  • Pipoca@lemmy.worldtoProgrammer Humor@lemmy.mlSTOP WRITING C
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    10 months ago

    C is not how a computer truly works.

    If you want to know how computers work, learn assembly and circuit design. You can learn C without ever thinking about registers, register allocation, the program counter, etc.

    Although you can learn assembly without ever learning about e.g. branch prediction. There’s tons of levels of abstraction in computers, and many of the lower level ones try to pretend you’ve still got a computer from the 80s even though CPUs are a lot more complex than they used to be.

    As an aside, I’ve anecdotally heard of some schools teaching Rust instead of C as a systems language in courses. Rust has a different model than C, but will still teach you about static memory vs the stack vs the heap, pointers, etc.

    Honestly, if I had to write some systems software, I’d be way more confident in any Rust code I wrote than C/C++ code. Nasal demons scare me.


  • Pipoca@lemmy.worldtoProgrammer Humor@lemmy.mlSTOP WRITING C
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    10 months ago

    Right tool for the job, sure, but that evolves over time.

    Like, years back carpenters didn’t have access to table saws that didn’t have safety features that prevent you from cutting off your fingers by stopping the blade as soon as it touches them. Now we do. Are old table saws still the “right tool for the job”, or are they just a dangerous version of a modern tool that results in needless accidents?

    Is C still the right tool for the job in places where Rust is a good option?