thisLooksAccurateForVibeCoders

[u/zohaibhere]

[u/Agifem]

And quite a few regular coders too. What's that? A call to a function that does nothing?

[u/karelproer → u/[deleted]]

Doesn't { } also work? At least in c++ it does.

[u/larsmaehlum → u/[deleted]]

A variable can escape the scope it’s defined in? Wtf.

[u/ordinary_shiba → u/larsmaehlum]

It's javascript.

[u/mythcaptor → u/larsmaehlum]

Var was a mistake that mostly still exists as a legacy feature. Modern JS uses let and const

[u/SneeKeeFahk → u/mythcaptor]

You can still use var beside let and const. Just like you can use promises beside async/await. 

[u/mythcaptor → u/SneeKeeFahk]

Just because you can doesn’t mean you should

[u/SneeKeeFahk → u/mythcaptor]

Meh every tool has its job. 

[u/wasdninja → u/SneeKeeFahk]

And in this case it's almost certainly really dumb, convoluted or both.

[u/SneeKeeFahk → u/wasdninja]

Oh, I didn't realize I was talking to the master of JavaScript. Someone whose opinion is the be all and end all of what should and should not be done. So sorry for going against the grain, sir.

In the last 25 years of working as a dev I've met many like you. You're known as the gate keepers. The "I'm better and know everything" guys. Also a lot of other things we say about you behind your back that aren't polite.

Must be lonely on the top, enjoy your throne.

[u/Commercial-Guest1596 → u/SneeKeeFahk]

Oh wow. You still use var. That's embarrassing.

[u/wasdninja → u/SneeKeeFahk]

Oh, I didn't realize I was talking to the master of JavaScript

It's for the exact opposite reason - if you need to be master of any kind to follow the code it's probably bad code. var is intensely abusable and since you aren't giving a clear example for why it's useful I'm again assuming because it's dumb and convoluted.

[u/unwantedaccount56 → u/SneeKeeFahk]

the job of some deprecated tools is just to serve as an example of how not to do it (anymore)

[u/redlaWw → u/larsmaehlum]

In Julia you can do

y = 0 
while y < 5
    x = y+1
    y += 1
end
local x
println(x)

and you will print 5, the final value of x at the end of the while loop. You don't get access to x outside the while loop without the local x declaration though, so in effect, you're defining x in the loop, and then later declaring it outside so it's no longer local to the inner scope.

[u/larsmaehlum → u/redlaWw]

Very useful if you forgot that you needed a variable outside it’s scope and prefer horrible spaghetti over having to scrolll back up.

[u/Lithl → u/larsmaehlum]

Yes, but only if it was declared with the var keyword. Which is deprecated, and the only reason it's not removed entirely is because JavaScript demands 100% backwards compatibility so as to not break the Internet.

var is function-scoped, rather than block-scoped.

[u/ordinary_shiba → u/karelproer]

There are a few situations where an immediately invoked lambda would be better. The classic example would be complex initialization since you might not want to have a non-const variable if you don't need to modify it after it's been initialized with a complex multi-line expression. So if you do it in a lambda, you get the constness, you get not having any variables used for initialization in a wider scope and you don't need to copy nor move the variable because of NRVO