func removeElement(nums []int, val int) int { for i := 0; i < len(nums); i++ { if nums[i] == val { nums = append(nums[:i], nums[i+1:]...) i-- } } return len(nums) } Rust 版本 下面这种写法编译无法通过: pub fn remove_elemen
let vec = Vec::from([1,2,3]); (3) vec! 宏 let vec = vec![1,2,3]; 用法示例及判断是否相等: fnmain() {letvec1=Vec::from([1,2,3]);println!("{:?}",vec1);letvec2=vec![1,2,3];println!("{:?}",vec2);assert_eq!(vec1,vec2);assert_eq!(vec1, [1,2,3]);assert...
let mut vec = vec![1, 2, 3]; vec[0] = 5; ``` 5.迭代元素: vec实现了IntoIterator trait,因此可以使用for循环来迭代它的元素。例如,以下代码将打印vec中的每个元素: ``` let vec = vec![1, 2, 3]; for element in vec println!("{}", element); ``` 6. 获取vec的长度和容量: - 使...
.3]; // 从索引 1 到索引 2(包括)提取元素 // remove let removed_element = v.remove(1); // 移除索引为 1 的元素(返回被移除的元素) // sort() v.sort(); // join let tt= vec!["hello", "Front789"]; let joined_string = tt.join(", "); // 使用逗号和空格连接元素 6. 函数...
buf: RawVec::with_capacity(cap), } } cap 会让大小成为 2 的倍数。因为 head == tail 是 empty 的表示,所以需要capacity + 1 对于push_back: #[stable(feature = "rust1", since = "1.0.0")] pub fn push_back(&mut self, value: T) { ...
use itertools::Itertools; fn main() { let items = vec!["víz", "árvíz", "víz", "víz", "ár", "árvíz"]; let c = items.iter().unique().count(); println!("{}", c); } 3 247. Filter list in-place Remove all the elements from list x that don't satisfy the predicat...
fn main() {let v = vec![1, 2, 3, 4, 5];let third: &i32 = &v[2]; println!("The third element is {}", third); match v.get(2) { Some(third) => println!("The third element is {}", third), None => println!("There is no third element."), }let v ...
let mut v = Vec::new(); v.push(1); v.push(2); 1. 2. 3. 读 使用.get()或者括号索引[]的方式来访问动态数组元素: let third: &i32 = &v[2]; // 3 let two: Option<&i32> = v.get(2); // Some(2) 1. 2. 如上面的代码所示,使用.get()方法得到的是Option<T>数据类型,而不是...
tasks: Vec<Task>, controls: Controls, dirty:bool, saving:bool, } #[derive(Debug, Clone)]enumMessage { Loaded(Result<SavedState, LoadError>), Saved(Result<(), SaveError>), InputChanged(String), CreateTask, FilterChanged(Filter), TaskMessage(usize, TaskMessage), ...
let mut numbers: Vec<i32> = vec![1, 2, 3, 4, 5];// 访问某个元素println!("The third element is {}.", numbers[2]);// 在末尾追加元素numbers.push(6);// 插入元素到特定位置numbers.insert( 3, 10);// 删除特定位置的元素numbers.remove(2);// 遍历所有元素for num in &numbers {pr...