Tips and Tricks

Random tips and tricks

• Run cargo clippy command
• Crates.io for rust is same as NPM for JavaScript
• Some examples are from https://rust-lang-nursery.github.io/rust-cookbook/intro.html

Errors and Solutions

[Stuck] Blocking waiting for file lock on package cache Delete .package-cache file

rm ~/.cargo/.package-cache

Order and Priority

See how adding parantheses, changed the result. It is not about the order here, always && will happen before ||

Program

fn main() {
    let (a, b, c) = (true, true, false);
    let mut d;

    println!("a is {}, b is {}, c is {}", a, b, c);

    d = a || b && c;
    println!("a || b && c, \t => {}", d);

    d = (a || b) && c;
    println!("(a || b) && c, \t => {}", d);

    d = c && a || b;
    println!("c && a || b, \t => {}", d);
}

Result

a is true, b is true, c is false
a || b && c,     => true
(a || b) && c,   => false
c && a || b,     => true