Why declaring multiple variable at once for same type feature exists in Golang?

[Yasser Sinjab]

Hi,

I'm just wondering why this feature is in Golang: such as 

var x, y, z string

Thanks,

Yasser

[Brian Candler]

What exactly is it about that expression that you don't think seems right?

It's a shortcut for:

var x string

var y string

var z string

I think that saving typing is a good feature.

Or do you object to the feature of being able to declare variables at all?

[Brian Candler]

There's also a lot of good background about the language design choices in the FAQ:

https://go.dev/doc/faq

Go derives much of its syntax from C, and the FAQ describes some of the differences from C.  But note that even C allows you to do the same:

int a, b, c;

char *x, *y, *z;

[Yasser Sinjab]

Thanks, I don't object it personally, but I had a debate about "grouping variables is considered a clean code". 

Let's say you have the following code:

var x, y, z string

var i int

And a new change came as:

var j int

var x, y, z string

var i int

For me this is not clean. Group them is cleaner like : 

var i, j int

That's of course with the exception that variables should be as close to the logic it is initialized for.

[K. Alex Mills]

Yes. Declaring i and j on the same line is certainly cleaner. We should all do it like that.

Am I missing something?

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[Kurtis Rader]

On Thu, Aug 18, 2022 at 7:25 PM Yasser Sinjab <ysi...@gmail.com> wrote:

Thanks, I don't object it personally, but I had a debate about "grouping variables is considered a clean code". 

I get the sense you were having a discussion with a coworker (or someone you were collaborating with on an open-source project) who objected to grouping var declarations with the same type and you are looking for validation of your viewpoint that grouping the declarations is preferable. Questions of code style are always fraught. That is, likely to lead to arguments with no obvious, definitive, reason to prefer one argument over all the others since there is some subjectiveness to preferring a particular style rule. Having said that I don't see any reason to prefer separate statements for each declaration of a var of the same type. My preference is, within reason, whatever minimizes the number of vertical lines to express the same intent.

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Kurtis Rader

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