1 files changed, 32 insertions, 0 deletions
diff --git a/src/counts.rs b/src/counts.rs
new file mode 100644
index 0000000..a339eb3
--- /dev/null
+++ b/src/counts.rs
@@ -0,0 +1,32 @@
+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);
+    }
+}