deviation:Implement count_neq

Author: munckymagik

src/deviation.rs

@@ -10,6 +10,10 @@ where
     fn count_eq(&self, other: &ArrayBase<S, D>) -> usize
     where
         A: PartialEq;
+
+    fn count_neq(&self, other: &ArrayBase<S, D>) -> usize
+    where
+        A: PartialEq;
 }
 
 impl<A, S, D> DeviationExt<A, S, D> for ArrayBase<S, D>
@@ -31,6 +35,13 @@ where
 
         c
     }
+
+    fn count_neq(&self, other: &ArrayBase<S, D>) -> usize
+    where
+        A: PartialEq,
+    {
+        self.len() - self.count_eq(other)
+    }
 }
 
 #[cfg(test)]
@@ -50,4 +61,17 @@ mod tests {
         assert_eq!(b.count_eq(&c), 0);
         assert_eq!(d.count_eq(&e), 4);
     }
+
+    #[test]
+    fn test_count_neq() {
+        let a = array![1, 2, 3, 4, 5, 6, 7];
+        let b = array![1, 3, 3, 4, 6, 7, 8];
+        let c = array![2, 4, 4, 5, 7, 8, 9];
+        let d = array![[1, 2], [3, 4], [5, 6]];
+        let e = array![[1, 2], [4, 3], [5, 6]];
+
+        assert_eq!(a.count_neq(&b), 4);
+        assert_eq!(b.count_neq(&c), 7);
+        assert_eq!(d.count_neq(&e), 2);
+    }
 }