Function fut::is_dup

pub fn is_dup(dup_map: &mut HashMap<String, bool>, id: &str) -> bool

Checks the duplicated map passed in for duplicates.

extern crate fut;

use fut::{is_dup, create_duplicate_map};

let mut dup_map = create_duplicate_map();

if is_dup(&mut dup_map, "some_key") {
  println!("We must do something about this duplicate!")
} else {
  println!("Good to go!")
}