Did you ever get asked in place string reverse in any programming language in interviews? Many years ago, I was asked 🙂
Now let’s get into it in #RUST programming language. It’s pretty simple to be fair.
Rust
pub fn reverse_string_in_place(value: &mut String) {
unsafe {
let bytes = value.as_bytes_mut();
let mut head = 0;
let mut tail = bytes.len() - 1;
while head < tail {
bytes.swap(head, tail);
head += 1;
tail -= 1;
}
}
}The usage would be like;
Rust
use crate::string_functions::reverse_string_in_place;
mod string_functions;
fn main() {
let mut word = String::from("Hello World");
reverse_string_in_place(&mut word);
println!("{}", word);
}Any as you may expect, the output would be;
dlroW olleH
