declaring multiple variables is less error-prone than in C. In C, the following declares x to be a pointer, but (surprisingly at first!) y to be a normal integer:
int* x, y;Whereas the equivalent in Go does what you’d expect, declaring both to be pointers:
var x, y *intI don’t think this is a related at all. C could have easily decided that the definition makes both
xandypointers. They just decided not to so that you can declare more variables on one line by being able to doint x, *y, **z, .... It is more flexible.Similarly that Go line could have been parsed like
var x, (y*) intif they wanted to. They just made a different choice.That’s why you write
int *x, y, **z;
C doesn’t write like “x is an int-pointer”, rather it says “dereferencing x will get you an int”.
100% and why I think
int*should be at the least a compiler warning, perhaps an outright error with pedantic enabled.
Number one thing that screws me up when moving between the TypeScript client-side code and the Java server-side code: how variables are declared. Java is type first, TypeScript is name first.
This doesn’t matter so so much that I don’t even have the words for it
The word is bikeshedding.
It does kiiiiinnnnda matter, but I just don’t care and it doesn’t affect me. Problem solving and remaining mentally flexible and able to switch gears is just kind of part of the field. But yeah, it feels like the “tabs or spaces” thing, in that, I have a preference, but I’m so used to encountering way, way dumber and worse bs that I don’t even care about tabs v spaces.
The choice doesn’t matter - consistency does a bit.
name before type makes it easier for compiler writers. Not the language users imo.
Eh, it’s just exposure. I wrote C and Java professionally for 15 years; switching to Go was not an issue for me and by now type-before-var feels clumsy. It’s just habit.
I will say you hit þe nail on þe head wiþ your first sentence: Go chose var-type for compiler speed, not because þey believed it was more intuitive.
This suggestion was made by the year-day-month dateformat gang.
That’s year-month-day hour:minute:second.millisecond +/-TZ, you heathen!
Hard disagree. Is that a joke? Type is far More important than name. Just ask the compiler.
sorry, I’m not a compiler, so no
Type is more important? So if the first argument of a function is
minAge, which is anint, the important part is that it is anint? Just feed it anyint?No, the important part is the meaning, what the variable actually is, if you use a compiled language the compiler will handle types for you anyway. You’ll get a error if you feed it a string, or an water heater object, no surprises.
Leave the machine work to the machine (compiler in this case), and concentrate on the real work, which is the meaning here.
Controversial take: it doesn’t matter in the slightest.
Typeless variables are a delusion, they’re just guessing what type they should be for you.
Breaking News: local dev argues peanut butter on jam is the same as jam on peanut butter.
As other users have said, we aren’t compilers.
Types are important for type safety, so you don’t access properties that don’t exist, can use polymorphism etc. However, having worked in both duck-typing and hard typing languages, I believe the most important part of a type is it’s name.
Classes are are arbitrary constructs we create to help us understand and manage code. They are inherently organisational structures.
That may sound like an argument FOR putting the name of the class first. “If I know it’s a
ConnectionCredentialsQuery, I don’t need to know it’s name, the use-case is evident!” Classes often get reused though, like aCartesianPoint. You may create several instances of them. Which of the name and type below are more indicative of use?CartesianPoint PlayerPosition;Types are, to some extent, implementation detail. The name tells you what the variable is for, which is more important.
Another point: You will always need to name variables well, because after declaration, whenever you see a variable, you will only see its name. You want to be able to fully understand what you are looking at without having to mouse over or go back to the declaration of a variable.
Additionally, many typed languages will allow you to use a syntax to altogether avoid declaring the type of a variable if derived from somewhere else.
var result = a + b; var customer = new Customer();Given that the type can be inferred, and therefore specifying it explicitly is optional, why make it the first thing you see? That means you need to move your eye back and forth when looking for the names of things. Which of these two are better for legibility:
var result = a + b; CartesianCoordinate playerPosition;const result = a + b; let playerPosition: CartesianCoordinate;Finally, you say that types are more important because they are important to the compiler, but compilers don’t care about the order of these definitions. Compilers exist to allow us to write easier to read code. They exist to convert high level languages to low level byte code. They exist to enable more readable code.
Thank you for coming to my TED talk.
Are you a compiler?
Maybe, but i speak English that follows adjective - noun pattern. So I’m already conditioned to type - name
My language does that, as well as English in which I am fluent. I still find type-first to be impractical.
Also when you write the code, you are usually looking to create a variable, so maybe you type “var” or “const”, right, then you have a contextual name in mind, maybe
salary. Then you can make a decision, which type it should be. Maybe “whole dollars”? “Dollars in a decimal number”? Or it could be a complex type in other contexts.That’s how I prefer to write code. 👍
Maybe it makes more sense to someone who knows more than one language as well, e.g. languages that use a noun-adjective structure, like French, or Farsi. I don’t know. But for me it’s not about language, it’s about practicality. Findability and writability, if those can be considered words, lol.
My main language is french, and yet i prefer the type-name order. Maybe its because i first learned C, but i guess its also because it goes from general to particular, whereas name-type feels like going backward (being detailed with name, then vague with type, then more detailed with value assignment). Anyway, i guess you’re right, it’s probably not a lot about language.
Exactly, first language (spoken or programming) doesn’t seem to play a role. It’s more about the mental model. 👍
Maybe this comes from a non-typed language perspective… As someone who learned in Java, I do not like it because yeah, type is way more important. If someone was coming from Python, I can see why they might think this…
I only use python and I don’t understand why someone might think that. The order in python’s type hints is wrong too.
I learned C++ first, have been using python for the last decade almost daily for various one off tasks. I like python, but if I had to build something that will be used even hundred of thousand times, I wouldn’t do it in python.
Anyway point being, despite me using for decades, I still yearn for C++.
I tried to use C++ in 1991 but the Borland Turbo C++ compiler was too buggy, so we used C instead. By 1996 C++ was “ready for primetime” on IBM-compatible PCs (yes, they still called them that, sometimes in 1996) and I switched - for 30 years.
I just spent 10 days building a proof of concept in Python, all the “common wisdom” says that was the fast way to get it done. Now that the prototype is done and the (initial) user feedback is addressed, I’m running a port to something better for lightweight, performant, easy deployment… sadly, C++ isn’t even on the radar for potential targets - top 3 candidates were Go, Rust and C#. I can’t abide the C# ecosystem, and Rust is just a little too rigid and immature for my tastes, so here we Go… anticipated to take 50% longer to port from Python than the Python took to develop in the first place… we shall see…
I learned Java first. I think type should come second as well, like in TypeScript et al.
If you’re ever looking for the variable manually for some reason, by searching with your eyes, it’s easier to find it by searching in the first character column.
Otherwise, if you ever need to see the type of something, which… should be obvious from the context in quality code, your LSP should just be able to tell you directly, by some mechanism (hover with mouse, or some keyboard action).
Script languages are quick and dirty (but slow), I hate it when they try to shoehorn every high level concept into them.
a lot of modern languages explicitly disagree, eg Kotlin and Rust
I think that’s so type inference can work by just omitting the type, instead of having to use “var” or “auto” in front of the variable name
not precisely. Rust has
let mutand Kotlin hasval; ie the member layout and the mutability are treated differently, since those languages have mutability rules.this is a circular argument anyway. the language designers could have figured out a way to do type inference like, eg, Java, but, again, explicitly chose not to.
deleted by creator
This is just arguing about whether the surname goes before or after the given name.
If you think
int xmakes the most sense, you might be Chinese. Or Hungarian. Or English speaking if you grew up with characters like Fireman Sam or Postman Pat… erm…If you think of
intas an adjective, the whole situation changes. It makes sense to an English speaker, but is backwards to a Spanish speaker.
Was about to write a post asking what the beverage dispenser in the authors workspace provided.
Then my brain snapped out of vacation mode and remembered that I mainly use var (mainly C# backend dev) which is effectively the same, and I’ve never had an issue with it.
Now I’m left torn and confused, and in work mode on vacation… What a day, and it’s not even 08:30.
