let clippy help

Cargo.lock

@@ -99,7 +99,7 @@ checksum = "78b3ae25bc7c8c38cec158d1f2757ee79e9b3740fbc7ccf0e59e4b08d793fa89"
 
 [[package]]
 name = "mvw"
-version = "0.1.0"
+version = "0.1.3"
 dependencies = [
  "dialoguer",
  "rand",

src/main.rs

@@ -48,7 +48,7 @@ fn lock_dir() {
 
 fn unlock_dir() {
     if Path::new(LOCK_FILE).is_file() {
-        let _result = fs::remove_file(LOCK_FILE).expect("Could not remove LOCK_FILE");
+        fs::remove_file(LOCK_FILE).expect("Could not remove LOCK_FILE");
     }
 }
 
@@ -68,7 +68,7 @@ fn create_temp_file(paths: &Vec<String>) -> String {
 
 fn remove_temp_file(tmpfile: &String) {
     if Path::new(tmpfile).is_file() {
-        let _result = fs::remove_file(tmpfile).expect("Could not remove tempfile");
+        fs::remove_file(tmpfile).expect("Could not remove tempfile");
     }
 }
 
@@ -88,12 +88,12 @@ fn read_temp_file(tmpfile: &String) -> Vec<String> {
         .collect()
 }
 
-fn unique_length(dst_paths: &Vec<String>) -> usize {
-    let map = dst_paths.into_iter().map(|x| (x, x)).collect::<HashMap<_, _>>();
+fn unique_length(dst_paths: &[String]) -> usize {
+    let map = dst_paths.iter().map(|x| (x, x)).collect::<HashMap<_, _>>();
     map.len()
 }
 
-fn unique_filename(dst_paths: &Vec<String>) -> String {
+fn unique_filename(dst_paths: &[String]) -> String {
     let mut string = Alphanumeric.sample_string(&mut rand::thread_rng(), 16);
 
     // Generate unique name that does not exist in dir and is not in dst_paths
@@ -103,7 +103,7 @@ fn unique_filename(dst_paths: &Vec<String>) -> String {
     string
 }
 
-fn move_safely(src_paths: &Vec<String>, dst_paths: &Vec<String>) {
+fn move_safely(src_paths: &[String], dst_paths: &[String]) {
     let src_len = src_paths.len();
     let mut intermediate_files: HashMap<String, String> = HashMap::new();
 
@@ -112,7 +112,7 @@ fn move_safely(src_paths: &Vec<String>, dst_paths: &Vec<String>) {
             // is the destination already in the source list?
             // if so, an intermediate file is needed
             if src_paths.iter().any(|j| j==&dst_paths[i]) {
-                let unique = unique_filename(&dst_paths);
+                let unique = unique_filename(dst_paths);
                 intermediate_files.insert(unique.clone(), dst_paths[i].clone());
                 fs::rename(&src_paths[i], &unique).expect("failed to rename file");
                 println!("Moving {} -> {}", src_paths[i], unique);
@@ -123,12 +123,12 @@ fn move_safely(src_paths: &Vec<String>, dst_paths: &Vec<String>) {
         }
     }
     for (src, dst) in intermediate_files.iter() {
-        fs::rename(&src, &dst).expect("failed to rename file");
+        fs::rename(src, dst).expect("failed to rename file");
         println!("Moving {} -> {}", src, dst);
     }
 }
 
-fn run_checks(src_paths: &Vec<String>, dst_paths: &Vec<String>) -> bool {
+fn run_checks(src_paths: &[String], dst_paths: &[String]) -> bool {
     // Make sure there are an equal number of sources and destinations
     if src_paths.len() != dst_paths.len() {
         println!("ERROR: Source and target list don't have the same number of lines.");
@@ -136,26 +136,25 @@ fn run_checks(src_paths: &Vec<String>, dst_paths: &Vec<String>) -> bool {
     }
 
     // Make sure destination names are not empty
-    if dst_paths.iter().any(|i| i=="") {
+    if dst_paths.iter().any(|i| i.is_empty()) {
         println!("ERROR: You can't move to empty names.");
         return true
     }
 
     // Make sure all destination files are unique
-    let dst_paths_length_unique = unique_length(&dst_paths);
+    let dst_paths_length_unique = unique_length(dst_paths);
     if dst_paths.len() != dst_paths_length_unique {
         println!("ERROR: You're trying to move multiple files to the same name.");
-        show_doubles(&src_paths, &dst_paths);
+        show_doubles(src_paths, dst_paths);
         return true
     }
     false
 }
 
-fn show_doubles(src_paths: &Vec<String>, dst_paths: &Vec<String>) {
+fn show_doubles(src_paths: &[String], dst_paths: &[String]) {
     let mut paths = HashMap::new();
-    let dst_len = dst_paths.len();
 
-    for i in 0..dst_len {
+    for (i, _) in dst_paths.iter().enumerate() {
         paths.entry(&dst_paths[i]).or_insert(Vec::new());
         paths.get_mut(&dst_paths[i]).unwrap().push(i);
     }