6 files changed, 24 insertions, 14 deletions
diff --git a/src/dictionary.rs b/src/dictionary.rs
index b522c9e..e0a561a 100644
--- a/src/dictionary.rs
+++ b/src/dictionary.rs
@@ -6,6 +6,11 @@ pub struct Dictionary {
     data : HashMap<String, u64>,
 }
 
+impl Default for Dictionary {
+    fn default() -> Self {
+        Self::new()
+    }
+}
 
 impl Dictionary {
     pub fn new() -> Self {
@@ -25,9 +30,9 @@ impl Dictionary {
     }
 
     pub fn set(&mut self, name : String) {
-        if !self.data.contains_key(&name) {
+        if let std::collections::hash_map::Entry::Vacant(e) = self.data.entry(name) {
             self.last_index += 1;
-            self.data.insert(name, self.last_index as u64);
+            e.insert(self.last_index as u64);
         }
     }
 
diff --git a/src/extractors/pdf.rs b/src/extractors/pdf.rs
index c08c75c..b7f65d5 100644
--- a/src/extractors/pdf.rs
+++ b/src/extractors/pdf.rs
@@ -127,7 +127,7 @@ fn get_pdf_text(doc: &Document) -> Result<PdfText, Error> {
 }
 
 pub fn pdf2text(path: &str) -> Result<String, Error> {
-    let doc = load_pdf(&path)?;
+    let doc = load_pdf(path)?;
     if doc.is_encrypted() {
         return Ok("".to_string());
     }
diff --git a/src/filecache.rs b/src/filecache.rs
index 5e9d324..287cea0 100644
--- a/src/filecache.rs
+++ b/src/filecache.rs
@@ -9,7 +9,7 @@ impl FileCache {
     pub fn from_line(line : String) -> Self {
         let ls : Vec<String> = line.split(',').map(|s| s.to_string()).collect();
         let v = FileVector::from_string(ls[1].clone());
-        let p = ls[0].clone().replace("\0", ",");
+        let p = ls[0].clone().replace('\0', ",");
         Self {
             vector : v,
             path : p
diff --git a/src/index.rs b/src/index.rs
index 4fabe32..8c358d3 100644
--- a/src/index.rs
+++ b/src/index.rs
@@ -52,8 +52,8 @@ impl Index {
                         entry.path()
                              .to_str()
                              .unwrap()
-                             .replace(",", "\0"),
-                        fv.to_string()
+                             .replace(',', "\0"),
+                        fv.stringify()
                     ).ok();
 
                     filecache.push(FileCache {
@@ -95,8 +95,8 @@ impl Index {
 
         for line in reader.lines() {
             let l = line.unwrap();
-            if l.starts_with("#") {
-                dict = Dictionary::from_line(&l.strip_prefix("#").unwrap());
+            if l.starts_with('#') {
+                dict = Dictionary::from_line(l.strip_prefix('#').unwrap());
             } else {
                 filecache.push(FileCache::from_line(l));
             }
@@ -112,9 +112,8 @@ impl Index {
         let mut v : FileVector = FileVector::new();
 
         for arg in search_args {
-            match self.dictionary.get(arg.to_string()) {
-                Some(value) => { v.insert(*value, 1);  }
-                None => {}
+            if let Some(value) = self.dictionary.get(arg.to_string()) {
+                v.insert(*value, 1);
             }
         }
 
diff --git a/src/text/pdf.rs b/src/text/pdf.rs
index efa441f..4413b78 100644
--- a/src/text/pdf.rs
+++ b/src/text/pdf.rs
@@ -1,5 +1,5 @@
 use crate::extractors::pdf;
 
 pub fn get_text(path : &str) -> String {
-    pdf::pdf2text(path).ok().unwrap_or_else(|| "".to_string())
+    pdf::pdf2text(path).ok().unwrap_or_default()
 }
diff --git a/src/vector.rs b/src/vector.rs
index 366812f..56d1817 100644
--- a/src/vector.rs
+++ b/src/vector.rs
@@ -18,6 +18,12 @@ impl DerefMut for FileVector {
     }
 }
 
+impl Default for FileVector {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl FileVector {
     pub fn new() -> Self {
         Self { data : HashMap::new() }
@@ -39,7 +45,7 @@ impl FileVector {
         Self { data }
     }
 
-    pub fn to_string(&self) -> String {
+    pub fn stringify(&self) -> String {
         let mut hex = String::new();
 
         for (i, v) in self.data.iter() {
@@ -53,7 +59,7 @@ impl FileVector {
 pub fn scalar_product(a : &FileVector, b : &FileVector) -> u64 {
     let mut c = 0;
     for (i, x) in a.iter() {
-        c += x * (b.get(i).unwrap_or_else(|| &0));
+        c += x * (b.get(i).unwrap_or(&0));
     }
     c
 }