fix: the code in flat_map should now be correct and changed formatting in renderer2d

crates/comet_structs/src/flat_map.rs

@@ -0,0 +1,64 @@
+pub struct MapNode<K, V> {
+  key: K,
+  value: V
+}
+
+impl<K, V> MapNode<K,V> {
+  pub fn new(key: K, value: V) -> Self {
+    Self {
+      key,
+      value
+    }
+  }
+
+  pub fn key(&self) -> &K {
+    &self.key
+  }
+
+  pub fn value(&self) -> &V {
+    &self.value
+  }
+}
+
+pub struct FlatMap<K: PartialEq, V> {
+  map: Vec<MapNode<K, V>>
+}
+
+impl<K: PartialEq, V> FlatMap<K, V> {
+  pub fn new() -> Self {
+    Self {
+      map: Vec::new()
+    }
+  }
+
+  pub fn insert(&mut self, key: K, value: V) {
+    let node = MapNode::new(key, value);
+    self.map.push(node);
+  }
+
+  pub fn remove(&mut self, key: K) {
+    for node in self.map {
+      if node.key() == *key {
+        self.map.retain(|&n| n.key() != *key);
+      }
+    }
+  }
+
+  pub fn get(&self, key: K) -> Option<&V> {
+    for node in self.map {
+      if node.key() == *key {
+        return Some(&node.value);
+      }
+    }
+    None
+  }
+
+  pub fn get_mut(&mut self, key: K) -> Option<&mut V> {
+    for mut node in self.map {
+      if node.key() == *key {
+        return Some(node.value);
+      }
+    }
+    None
+  }
+}