Imagine lint running on format and your linter removing unused variables: you start typing, hit format by muscle memory before using the variable. Rinse and repeat.
It’s probably gonna be optimized out by the compiler. However, linters will mark it for you, since it suggests that you actually wanted to do something with that variable and forgot about it after declaration.
… Or it can be removed to reduce visual noise once it’s not necessary anymore after refactoring.
Lets say you use a variable named abcd in your function. And a variable named abcb in a for loop inside the same function. But because reasons you mistakenly use abcd inside that loop and modify the wrong variable, so that your code sometimes doesnt work properly.
It’s to prevent mistakes like that.
A similar thing is to use const when the variable is not modified.
I start writing the implementation and get the “variable not defined” error and then let the ide add the declaration. It’s less keys to press and misspell.
I recently started poking with Vue, For the most part when it comes to webapps I’ve mostly worked with React, Blazor, and a touch of Svelte. The linter is so aggressive. I start defining a method and it instantly goes “IT DOESN’T RETURN ANYTHING!!”
Okay, thanks! I literally just defined the return type!
How do you mean? You can’t type a word without using it in a word processor. Once the word is typed out it’s been used. Variables need to be declared then used so 2 separate steps.
What do you mean? Variables do not necessarily need to be used, you can allocate memory for some value and initialise it but then simply don’t do anything with it.
This episode of Dexter’s Lab first aired more than 20 years before the first episode of Primal (Feb 1998 vs Oct 2019). A bit of visual discrepancy is to be expected
Flew under my radar. Gotta watch that. Which reminds me I still need to finish off Samurai Jack. I think I stopped somewhere in the last season of the old series and I want to watch that before I get to the new episodes, which I hear are excellent.
Of course, I’ll probably want to finish off the few lingering pieces of new trek. And I gotta watch all of that before second season of Arcane comes out, since that will take priority as soon as it comes out. And…
If you don’t understand much about AI models, how they work, how to install/use them and unable to recover all of the specific jargon that comes with the field…
That site is very useful but it’s not a great starting point, it is not useful in the terms of understanding everything beyond just diving in the deep end and troubleshooting via external help forums like stack overflow regularly to figure it out.
IDE is one thing, Go refuses to compile. Like calm down, I’m going to use it in a second. Just let me test the basics of my new method before I start using this variable.
Or every time you add or remove a printf it refuses to compile until you remove that unused import. Please just fuck off.
Yeah I think it’s trauma due to C/C++'s awful warning system, where you need a gazillion warnings for all the flaws in the language but because there are a gazillion of them and some are quite noisy and false positives prone, it’s extremely common to ignore them. Even worse, even the deadly no-brainer ones (e.g. not returning something from a function that says it will) tend to be off by default, which means it is common to release code that triggers some warnings.
Finally C/C++ doesn’t have a good packaging story so you’ll pretty much always see warnings from third party code in your compilations, leading you to ignore warnings even more.
Based on that, it’s very easy to see why the Go people said “no warnings!”. An unused variable should definitely be at least a warning so they have no choice but to make it an error.
I think Rust has proven that it was the wrong decision though. When you have proper packaging support (as Go does), it’s trivial to suppress warnings in third party code, and so people don’t ignore warnings. Also it’s a modern language so you don’t need to warn for the mistakes the language made (like case fall through, octal literals) because hopefully you didn’t make any (or at least as many).
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