rylev · January 26, 2022 17:30 · Jan 26, 2022
diff --git a/counter.rs b/counter.rs
@@ -0,0 +1,37 @@
+use std::collections::HashMap;
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let path = std::env::args()
+        .skip(1)
+        .next()
+        .ok_or("Must supply name of file as first argument")?;
+    let contents = std::fs::read_to_string(path)?;
+    let counter = Counter::new(&contents);
+
+    loop {
+        let mut buffer = String::new();
+        std::io::stdin().read_line(&mut buffer)?;
+        let word = buffer.trim();
+        println!("count: {}", counter.get_count(word));
+        buffer.clear();
+    }
+}
+
+struct Counter<'a> {
+    words: HashMap<&'a str, usize>,
+}
+
+impl<'a> Counter<'a> {
+    fn new(contents: &'a str) -> Counter<'a> {
+        let mut words = HashMap::<&str, usize>::new();
+        for word in contents.split(" ") {
+            *words.entry(word).or_default() += 1;
+        }
+
+        Self { words }
+    }
+
+    fn get_count(&self, word: &str) -> usize {
+        todo!("implement this method")
+    }
+}