【Rust】字符串（四）

环境

• Time 2022-03-24
• Rust 1.59.0

示例

drain

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

replace_range

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

into_boxed_str

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

from_utf16

fn main() {
    let value = &[0xD834, 0xDD1E, 0x006d, 0x0075, 0x0073, 0x0069, 0x0063];
    let value = String::from_utf16(value).unwrap();
    println!("{:?}", value);
}

from_utf16_lossy

fn main() {
    let value = &[0xD834, 0xDD1E, 0x006d, 0x0075, 0x0073, 0x0069, 0x0063];
    let value = String::from_utf16_lossy(value);
    println!("{:?}", value);
}

try_reserve

fn main() {
    let mut name = String::from("JiangBo");
    name.try_reserve(10).unwrap();
    println!("{:?}", name.capacity());
}

try_reserve_exact

fn main() {
    let mut name = String::from("JiangBo");
    name.try_reserve_exact(10).unwrap();
    println!("{:?}", name.capacity());
}

总结

了解了字符串中相关的一些方法。

附录