如何在迭代期间改变向量的项目?
How to mutate items of a vector during iteration?
我有一个 Vec
结构。当使用 .iter()
遍历此 Vec
时,我想编辑 for
循环内的每个元素,但我收到一条错误消息,指出每个元素都已被借用,我该如何解决这个问题?这是一个小代码示例:
struct complex_struct {
attr1: i32
}
let elements: Vec<complex_struct> = generate_data();
for element in elements.iter() {
element.attr1 = 0;
}
使用 iter_mut
从迭代器中获取可变元素:
#[derive(Debug)]
struct ComplexStruct {
attr1: i32
}
fn main() {
let mut elements: Vec<ComplexStruct> = vec![ComplexStruct { attr1: 5 }];
for element in elements.iter_mut() {
element.attr1 = 0;
}
dbg!(elements); // prints out [ComplexStruct { attr1: 0 }]
}
我有一个 Vec
结构。当使用 .iter()
遍历此 Vec
时,我想编辑 for
循环内的每个元素,但我收到一条错误消息,指出每个元素都已被借用,我该如何解决这个问题?这是一个小代码示例:
struct complex_struct {
attr1: i32
}
let elements: Vec<complex_struct> = generate_data();
for element in elements.iter() {
element.attr1 = 0;
}
使用 iter_mut
从迭代器中获取可变元素:
#[derive(Debug)]
struct ComplexStruct {
attr1: i32
}
fn main() {
let mut elements: Vec<ComplexStruct> = vec![ComplexStruct { attr1: 5 }];
for element in elements.iter_mut() {
element.attr1 = 0;
}
dbg!(elements); // prints out [ComplexStruct { attr1: 0 }]
}