Zliczanie wystąpień słów (Rust master @ 2014-06-10)

counter.rs

use std::collections::HashMap;
use std::path::Path;
use std::io::fs::File;
use std::io::BufferedReader;

fn main() {
	let path = Path::new("potop2.txt");
	let reader = File::open(&path).unwrap();
	let mut reader = BufferedReader::new(reader);

	let mut counter : HashMap<String, int> = HashMap::new();
	for line in reader.lines() {
		for word in line.unwrap().as_slice().words() {
			let trims = &['\n', '\t', '.', ',', '?', '!', '-', ';', ':', '\"', '(', ')', '_', '=', '\\', '\''];
			let word = word.trim_chars(trims);
			let word = word.chars().map(|c| c.to_lowercase()).collect();
			*counter.find_or_insert(word, 0) += 1;
		}
	}
	
	let mut v = Vec::new();
	for (ref w, n) in counter.iter() {
		v.push( (n, w.as_slice()) );
	}
	v.sort();
	// counter.insert("dupa".to_string(), 42);
	// ↑ nie skompiluje się, bo groziłoby to dyndającymi wskaźnikami w wektorze v
	// yay Rust!
	for &(w, n) in v.iter() {
		println!("{} {}", w, n);
	}
}