【Rust】字符串（三）

环境

• Time 2022-03-24
• Rust 1.59.0

示例

remove

fn main() {
    let mut name = String::from("JiangBo");
    name.remove(4);
    println!("{name:?}");
}

retain

fn main() {
    let mut name = String::from("JiangBo");
    name.retain(|c| c.is_ascii_uppercase());
    println!("{name:?}");
}

insert

fn main() {
    let mut name = String::from("JiangBo");
    name.insert(5, '-');
    println!("{name:?}");
}

insert_str

fn main() {
    let mut name = String::from("JiangBo");
    name.insert_str(5, "----");
    println!("{name:?}");
}

as_mut_vec

fn main() {
    let mut name = String::from("JiangBo");
    let name = unsafe { name.as_mut_vec() };
    println!("{name:?}");
}

len

fn main() {
    let name = String::from("JiangBo");
    println!("{:?}", name.len());
}

is_empty

fn main() {
    let name = String::from("JiangBo");
    println!("{:?}", name.is_empty());
}

split_off

fn main() {
    let mut name = String::from("JiangBo");
    let name = name.split_off(5);
    println!("{:?}", name);
}

clear

fn main() {
    let mut name = String::from("JiangBo");
    name.clear();
    println!("{:?}", name);
}

总结

了解了字符串中相关的一些方法。

附录