Show u8 slice in hex representation

Question

I need to convert &[u8] to a hex representation. For example [ A9, 45, FF, 00 ... ].

The trait std::fmt::UpperHex is not i

Answer 1

There's a crate for this: hex-slice.

For example:

extern crate hex_slice;
use hex_slice::AsHex;

fn main() {
    let foo = vec![0u32, 1, 2 ,3];
    println!("{:02x}", foo.as_hex());
}