fnis_even(x:&i32)->bool{x%2==0}fnmain(){letnumbers=vec![1,2,3,4,5];leteven_numbers:Vec<i32>=numbers.iter().filter(|x|is_even(*x)).collect();println!("{:?}",even_numbers);// 输出:[2, 4]} 在上述例子中,我们定义了一个is_even函数,用于判断一个整数是否为偶数。然后使用filt...
下面的代码,我们定义了一个函数 is_even()。如果传递的参数不是偶数则会抛出一个可恢复错误。 fnmain(){letresult=is_even(13);matchresult{Ok(d)=>{println!("no is even {}",d);},Err(msg)=>{println!("Error msg is {}",msg);}}println!("end of main");}fnis_even(no:i32)->Result<bo...
(&a);});s.spawn(||{println!("hello from the second scoped thread");// We can even mutably borrow `x` here,// because no other threads are using it.x+=a[0]+a[2];});println!
License or out of the use or inability to use the Work (including but not limited to damages for loss of goodwill, work stoppage, computer failure or malfunction, or any and all other commercial damages or losses), even if such Contributor has been advised of the possibility of such ...
A panic is not a crash. It’s not undefined behavior. It’s more like a RuntimeException in Java or a std::logic_error in C++. The behavior is well-defined; it just shouldn’t be happening. Panic is safe. It doesn’t violate any of Rust’s safety rules; even if you manage to...
Heavier dependencies are kept out ofegui, even as opt-in. All code ineguiis Wasm-friendly (even outside a browser). To load images intoeguiyou can use the officialegui_extrascrate. eframeon the other hand has a lot of dependencies, includingwinit,image, graphics crates, clipboard crates, ...
在一把旧钥匙上发现了一则意义深远的铭文—— 如果我休息,我就会生锈。对于那些懒散而烦恼的人来说,这将是至理名言。 Even the most industrious person might adopt it with advantage to serve as a reminder that, if one allows his faculties to rest, like the iron in the unused key, they will so...
Democracy or Republic: What's the difference? Why is '-ed' sometimes pronounced at the end of a word? What's the difference between 'fascism' and 'socialism'? More Commonly Misspelled Words Words You Always Have to Look Up Popular in Wordplay ...
Since the ownership was transferred, the value of p12 is no longer useable by the function you are writing. In other words, even without a loop, you can run into this error: let p12 = gpioa.pa12; p12.into_push_pull_output().set_low().unwrap(); return p12; // ERROR! `p12` has...