Question

How to check if an array of bytes is a valid UTF-8 string in Rust

Answer 1

use std::str;

fn is_valid_utf8(data: &[u8]) -> bool {
    str::from_utf8(data).is_ok()
}

fn main() {
    let arr1 = "Hello, 世界".as_bytes();
    let arr2 = &[0xa3, 0xed, 0xfd];

    println!("{}", is_valid_utf8(arr1)); 
    println!("{}", is_valid_utf8(arr2));
}

 
 
/*
run:
   
true
false

*/
 

 

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