Run: cargo clippy --fix -Z unstable-options and cargo fmt

src/math/distance/euclidian.rs

@@ -38,7 +38,7 @@ impl Euclidian {
         let mut sum = T::zero();
         for i in 0..x.len() {
             let d = x[i] - y[i];
-            sum = sum + d * d;
+            sum += d * d;
         }
 
         sum

src/math/distance/mahalanobis.rs

@@ -68,8 +68,8 @@ impl<T: RealNumber, M: Matrix<T>> Mahalanobis<T, M> {
         let sigma = data.cov();
         let sigmaInv = sigma.lu().and_then(|lu| lu.inverse()).unwrap();
         Mahalanobis {
-            sigma: sigma,
-            sigmaInv: sigmaInv,
+            sigma,
+            sigmaInv,
             t: PhantomData,
         }
     }
@@ -80,8 +80,8 @@ impl<T: RealNumber, M: Matrix<T>> Mahalanobis<T, M> {
         let sigma = cov.clone();
         let sigmaInv = sigma.lu().and_then(|lu| lu.inverse()).unwrap();
         Mahalanobis {
-            sigma: sigma,
-            sigmaInv: sigmaInv,
+            sigma,
+            sigmaInv,
             t: PhantomData,
         }
     }
@@ -118,7 +118,7 @@ impl<T: RealNumber, M: Matrix<T>> Distance<Vec<T>, T> for Mahalanobis<T, M> {
         let mut s = T::zero();
         for j in 0..n {
             for i in 0..n {
-                s = s + self.sigmaInv.get(i, j) * z[i] * z[j];
+                s += self.sigmaInv.get(i, j) * z[i] * z[j];
             }
         }
 

src/math/distance/manhattan.rs

@@ -35,7 +35,7 @@ impl<T: RealNumber> Distance<Vec<T>, T> for Manhattan {
 
         let mut dist = T::zero();
         for i in 0..x.len() {
-            dist = dist + (x[i] - y[i]).abs();
+            dist += (x[i] - y[i]).abs();
         }
 
         dist

src/math/distance/minkowski.rs

@@ -48,7 +48,7 @@ impl<T: RealNumber> Distance<Vec<T>, T> for Minkowski {
 
         for i in 0..x.len() {
             let d = (x[i] - y[i]).abs();
-            dist = dist + d.powf(p_t);
+            dist += d.powf(p_t);
         }
 
         dist.powf(T::one() / p_t)

src/math/distance/mod.rs

@@ -45,7 +45,7 @@ impl Distances {
     /// Minkowski distance, see [`Minkowski`](minkowski/index.html)
     /// * `p` - function order. Should be >= 1
     pub fn minkowski(p: u16) -> minkowski::Minkowski {
-        minkowski::Minkowski { p: p }
+        minkowski::Minkowski { p }
     }
 
     /// Manhattan distance, see [`Manhattan`](manhattan/index.html)

src/math/num.rs

@@ -57,19 +57,19 @@ impl RealNumber for f64 {
 
     fn ln_1pe(self) -> f64 {
         if self > 15. {
-            return self;
+            self
         } else {
-            return self.exp().ln_1p();
+            self.exp().ln_1p()
         }
     }
 
     fn sigmoid(self) -> f64 {
         if self < -40. {
-            return 0.;
+            0.
         } else if self > 40. {
-            return 1.;
+            1.
         } else {
-            return 1. / (1. + f64::exp(-self));
+            1. / (1. + f64::exp(-self))
         }
     }
 
@@ -98,19 +98,19 @@ impl RealNumber for f32 {
 
     fn ln_1pe(self) -> f32 {
         if self > 15. {
-            return self;
+            self
         } else {
-            return self.exp().ln_1p();
+            self.exp().ln_1p()
         }
     }
 
     fn sigmoid(self) -> f32 {
         if self < -40. {
-            return 0.;
+            0.
         } else if self > 40. {
-            return 1.;
+            1.
         } else {
-            return 1. / (1. + f32::exp(-self));
+            1. / (1. + f32::exp(-self))
         }
     }