main.rs

use std::io;
use std::collections::HashMap;
use std::ascii::AsciiExt;

fn main() {
    let mut words: HashMap<String, uint> = HashMap::new();
    for line in io::stdin().lock().lines() {
        for word in line.ok().unwrap().words() {
            let lc = word.to_string().to_ascii_lower();
            if words.contains_key(lc.as_slice()) {
                match words.get_mut(lc.as_slice()) {
                    Some(w) => *w += 1,
                    None => (),
                }
            } else {
                // let cw = "FakeWord";
                words.insert(lc.clone(), 1);
            }
        }
    }
    for (word, count) in words.iter() {
        println!("{}: {}", *word, *count);
    }
}