diff --git a/src/errors.rs b/src/errors.rs
index a5914e3..4986419 100644
--- a/src/errors.rs
+++ b/src/errors.rs
@@ -64,7 +64,7 @@ impl std::error::Error for Error {
                 } else {
                     None
                 }
-            },
+            }
             Error::CouldNotCheckNAtoms(err) => Some(err.as_ref()),
             _ => None,
         }
@@ -200,7 +200,7 @@ pub enum ErrorCode {
 
 impl ErrorCode {
     /// True if the error is an end of file error, false otherwise
-    pub fn is_eof(&self) -> bool {
+    pub fn is_eof(self) -> bool {
         matches!(self, Self::ExdrEndOfFile)
     }
 }
diff --git a/src/frame.rs b/src/frame.rs
index 6b9f0e9..08e81c5 100644
--- a/src/frame.rs
+++ b/src/frame.rs
@@ -40,14 +40,13 @@ impl Frame {
     }
 
     /// Filters the frame by removing all atoms not matching the given indeces.
-    pub fn filter_coords(self: &mut Frame, indeces: &[usize]) {
+    pub fn filter_coords(self: &mut Frame, indices: &[usize]) {
         self.coords = self
             .coords
             .iter()
-            .map(|elem| elem.clone())
             .enumerate()
-            .filter(|&(i, _)| indeces.contains(&i))
-            .map(|(_, elem)| elem)
+            .filter(|(i, _)| indices.contains(i))
+            .map(|(_, elem)| *elem)
             .collect();
     }
 
diff --git a/src/iterator.rs b/src/iterator.rs
index 201dcf8..ab5519b 100644
--- a/src/iterator.rs
+++ b/src/iterator.rs
@@ -49,7 +49,7 @@ impl<T: Trajectory> TrajectoryIterator<T> {
         // It's OK to do this every frame because the result is cached by Trajectory
         let num_atoms = match &self.trajectory.get_num_atoms() {
             &Ok(n) => n,
-            Err(e) => Err(Error::CouldNotCheckNAtoms(Box::new(e.clone())))?,
+            Err(e) => return Err(Error::CouldNotCheckNAtoms(Box::new(e.clone()))),
         };
 
         // Reuse old frame
diff --git a/src/lib.rs b/src/lib.rs
index e296061..6a916f5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -175,7 +175,7 @@ impl XDRFile {
                 })
             } else {
                 // Something went wrong. But the C api does not tell us what
-                Err((path, filemode))?
+                Err((path, filemode).into())
             }
         }
     }
@@ -275,8 +275,8 @@ impl Trajectory for XTCTrajectory {
             .get_num_atoms()
             .map_err(|e| Error::CouldNotCheckNAtoms(Box::new(e)))?;
         if num_atoms != frame.coords.len() {
-            Err((&*frame, num_atoms))?;
-        };
+            return Err((&*frame, num_atoms).into());
+        }
 
         unsafe {
             let code = xdrfile_xtc::read_xtc(
@@ -402,7 +402,7 @@ impl Trajectory for TRRTrajectory {
             .get_num_atoms()
             .map_err(|e| Error::CouldNotCheckNAtoms(Box::new(e)))?;
         if num_atoms != frame.coords.len() {
-            Err((&*frame, num_atoms))?;
+            return Err((&*frame, num_atoms).into());
         }
 
         unsafe {
@@ -631,21 +631,17 @@ mod tests {
             Ok(s) => {
                 assert_eq!(s, CString::new("test")?);
             }
-            Err(_) => panic!("Valid Path failed to convert to CString.")
+            Err(_) => panic!("Valid Path failed to convert to CString."),
         }
 
-        // \0 in path should result in an InvalidOsStr(Some(NulError)) 
+        // \0 in path should result in an InvalidOsStr(Some(NulError))
         let result = path_to_cstring(PathBuf::from("invalid/\0path"));
         match result {
             Ok(_) => panic!("Cstring conversion did not fail"),
-            Err(e) => {
-                match e {
-                    Error::InvalidOsStr(opt) => {
-                        assert!(opt.is_some())
-                    }
-                    _ => panic!("Wrong error type. (This should never happend).")
-                }
-            }
+            Err(e) => match e {
+                Error::InvalidOsStr(opt) => assert!(opt.is_some()),
+                _ => panic!("Wrong error type. (This should never happend)."),
+            },
         }
         Ok(())
     }