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.
Emacs is a bunch older than common lisp.
One of its more idiosyncratic design decisions was using dynamic scope, rather than lexical scope. They did add in per-file lexical scope, though.
It also just doesn’t implement a lot of common lisp’s standard library.
Emacs unfortunately uses Emacs lisp, not common lisp or scheme.
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:
All of the items of that list have to be the same type of number - they’re all Ints or all Doubles or something
It’s a list of primitive numbers and the implementation is kept separate - no need for boxing and unboxing.
Even if that list is empty, you still have access to the implementation, so you can return a type-appropriate zero value
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.
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.
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?
Apparently my brain silently inserted “ing with” into the middle of “program functions” a half dozen times without me noticing.
It’s really not just that Rust is new and C is old. Compare Rust with Go, for example. Go is a fairly modern example of a ‘worse is better’ language.
Back in 1970s when C was invented, Lisp had been around for over a decade. C came out the same year as smalltalk, a year before ML, and 3 years before Scheme.
Rust is a very modern language, yes. There’s no way we could have had it in the 70s; many of its language features hadn’t been invented yet. But it very much depends on MIT style research languages for its basis.
I agree with you that if you use functions it’s functional.
But many people don’t really realize how that contrasts with procedures and procedural code.
Functions, here, being the key word.
Functions are pure mappings from input to output.
C is many things, but elegant really isn’t one of them.
C has always been part of the “worse is better”/New Jersey school of thinking. The ultimate goal is simplicity. Particularly simplicity of language implementation, even if that makes programs written in that language more complex or error prone. It’s historically been a very successful approach.
Rust, on the other hand, is part of “The Right Thing”/MIT approach. Simplicity is good, but it’s more important to be correct and complete even if it complicates things a bit.
I don’t really think of void* and ubiquitous nulls, for example, as the hallmark of elegance, but as pretty simple, kludgey solutions.
Rust, on the other hand, brings a lot of really elegant solutions from ML- family languages to a systems language. So you get algebraic data types, pattern matching, non-nullable references by default, closures, typeclasses, expression-oriented syntax, etc.
Just like walking doesn’t really compete, like at all, with flying in an aircraft, Functional and Object Oriented Programming are at their best when you use whichever approach makes sense for a given situation and in any reasonably complex software that means your code should be full of both.
I’m not really sure sure that’s true.
In FP languages like Haskell, you get tools like algebraic data types, typeclasses, and pattern matching.
FP is really opposed to imperative programming, while objects are opposed to algebraic data types.
You can write OO code that’s 100% fully functional, and you can write code in Haskell or rust where you barely notice you never once used an object.
Yeah, OO and FP aren’t really opposed. FP is opposed to imperative programming.
That said, most FP languages give you a slightly different set of tools to use. Algebraic data types and typeclasses are really, really nice.
Honestly, working in Haskell or rust, you don’t really miss the fact that you have to jump through hoops to get traditional OO objects. There’s just not really many cases where you need them.
In the US, at least, AI works are inherently public domain. Because copyright only applies to works with a human author.
Pure functions should be referentially transparent; you should be able to replace them with whatever value they evaluate to without changing the semantics of your code.
Throwing is referentially impure: what value do you get from calling x => throw new RuntimeException()?
Instead, functional languages prefer to return a tagged union of the value or the error.
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.