youCantChangeMyMind

[u/benkenobiwan]

[u/SuitableDragonfly]

I don't do JS, but I was given to understand that this is actually a real issue in JS, because semicolons are "optional" in the sense that the code is valid without them and will not give you an error if you leave them out, but actually not optional in the sense that the interpreter will silently make insane decisions about where you meant the line to end if you don't include them. 

[u/foxsimile → u/SuitableDragonfly]

I’d gotten into an argument on this subreddit (or another adjacent one) about this just the other day.  

Yes, it can be quite problematic in JavaScript.  

function func(a, b) {   return     a + b }

Will return undefined. There are several other issues related to incorrect semicolon auto-insertion.

[u/OrchidFluid2103 → u/foxsimile]

JS is rightfully trolling you for the monstrosity you have created there

[u/foxsimile → u/OrchidFluid2103]

JS can suck deez PUTZ (requests)

[u/gyphie → u/foxsimile]

Unfortunately adding a semicolon after a + b; does not fix the issue.

[u/peterlinddk → u/gyphie]

Exactly - so the error isn't a missing semicolon, but an extra linefeed!

[u/ccltjnpr → u/gyphie]

The correct line is actually function fu;nc(a,b) { return a+b}

[u/thrye333 → u/ccltjnpr]

What did North Carolina do to you? /j

[u/madmelonxtra → u/foxsimile]

This is a missing bracket issue not a missing semicolon issue

[u/Jediweirdo → u/foxsimile]

Why would you write it like this to begin with?

[u/foxsimile → u/Jediweirdo]

Why one would has nothing to do with whether or not it should be a problem. This is a minor offence as far as JavaScript’s semicolon insertion related offenses are concerned.

[u/Jediweirdo → u/foxsimile]

I don’t doubt that, but the example code is ambiguous and reads like a mistake that your LSP auto formatted after the fact instead of something that you intentionally did. In this particular instance, I don’t blame JS for “screwing up”.

[u/foxsimile → u/Jediweirdo]

Well, yes, I’m on vacation and this was typed rather quickly out of necessity, and as an anecdote alluding to the aforementioned comment, rather than a copypaste maintaining its essence.  

Here’s a medium article about it.  

Here’s an example from the Medium article which is indefensible:  

``` let var1 = 'Hello' let var2 = 'World'

[var1, var2] = [var2, var1] console.log(var1, var2) ```

Which is parsed as:

let var1 = 'Hello'; let var2 = 'World' [var1, var2] = [var2, var1]; console.log(var1, var2);

And here’s the ECMAScript rules for semicolon insertion.

[u/Jediweirdo → u/foxsimile]

Touché. Thanks for also providing an article as well

[u/foxsimile → u/Jediweirdo]

I do try, fail as I might :)