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-Wall ain't all (lemmy.world)
submitted 3 years ago by to c/programmerhumor@lemmy.ml
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[–] 57 points 3 years ago (1 child)

int unused_variable = 0;

Dude wtf is your problem don’t just leave things lying about there don’t you know how to code I mean what the- I don’t go to your house and leave shit on the floor and just—

int _unused_variable = 0;

Ok. We cool.

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  • [–] 1 point 2 years ago

    sometimes you need an unused variable. some uses in rust:

    // destructuring
let (width, _height) = get_dimensions();

// trait implementations (i couldnt think of a better example for this)
impl Into for AlwaysZero {
    fn into(_value: Self) -> {
        return 0;
    }
}

// some types (eg. Result) must be 'used'
// assigned to a variable if we dont care about the return value
let _ = returns_result("foo");
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    • [–] 49 points 3 years ago (4 children)

    mfw my face when the go compiler fucking screams at me because I dared to declare a variable and not use it

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  • [–] 11 points 3 years ago (1 child)

    "Don't worry too much about your loops bro, I am the apex of computer science research, I know every optimization in the book." Ok want to compile this? "Is that... An unused variable?!? WHAT THE FUCK ARE WE GOING TO DO GOD IS DEAD"

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    • [–] 29 points 3 years ago* (1 child)

    I am guilty of passing Exception variables into try catches and not using them

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    • [–] 13 points 3 years ago (4 children)

    Function is changing a global variable, the global variable is checked after every call to the function. That's your return value.

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    • [–] 9 points 3 years ago (7 children)

    laughs in golang

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  • [–] [S] 8 points 3 years ago (6 children)

    I would love to use golang for this but it’s standard library alone is bigger than the amount of available RAM.

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  • [–] 2 points 3 years ago (2 children)

    Interesting, since golang only includes the parts of the stdlib that are used in the executable binary.

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  • [–] [S] 4 points 3 years ago (1 child)

    I just tested it and a simple hello world program still produces a 1.7MiB binary, while the device only has 512KiB of RAM.

    package main

import "fmt"

func main() {
    fmt.Println("hello world")
}
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  • [–] 1 point 3 years ago (2 children)

    BTW: what are you using instead to get small binaries/scripts?

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    • [+] 6 points 3 years ago
    [deleted]
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    [–] 1 point 3 years ago

    Idk, mb they expected you to modify smth passed by reference/pointer, and the compiler's too busy to care :)

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    [–] -2 points 3 years ago (1 child)

    Ok, you are certainly in one of those languages where plenty of your functions shouldn't return a value, and you won't ever let the compiler know that.

    On all of the other languages, it's an error, not even a warning.

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