Rust code shared from the playground

playground.rs

/// merges an array with ordinal numbers into a string

extern crate itertools;

use itertools::Itertools;

fn join_int_slice(slice:&[u8]) -> String {
    slice.iter().map(|&a| a as char).join("")
}

fn main() {
    let a = [70,90,80];
    println!("{}", join_int_slice(&a));
}