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use std::collections::HashMap;
pub type WordCounts = HashMap<String, u32>;
pub fn count(counts: &mut WordCounts, word: String) {
add(counts, word, 1);
}
pub fn add_counts(counts: &mut WordCounts, other: &WordCounts) {
for (word, count) in other.iter() {
add(counts, word.to_string(), *count);
}
}
pub fn add(counts: &mut WordCounts, word: String, count: u32) {
let counter = counts.entry(word).or_insert(0);
*counter += count;
}
pub fn print(counts: &WordCounts, max: usize) {
let mut top = Vec::new();
for (word, count) in counts.iter() {
top.push((count, word));
if top.len() > max {
top.sort();
top.reverse();
top.truncate(max);
}
}
for (count, word) in top.iter() {
println!("{} {}", count, word);
}
}
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