reorganisation of fonctions and file

src/node.rs

@@ -165,3 +165,15 @@ pub fn read_tree(binary: &str, chars: &Vec<char>) -> Node {
     }
     root
 }
+pub fn nodes_at_vec(map: HashMap<char, i32>) -> Vec<Node> {
+    let mut nodes = Vec::new();
+
+    for (key, value) in &map {
+        let mut node = Node::new();
+        node.set_char(*key);
+        node.set_counter(*value);
+        nodes.push(node);
+    }
+    nodes.sort();
+    nodes
+}