Added a min() and max() function for all Numbers.

src/number.rs

@@ -15,7 +15,7 @@ use ::bounded::Bounded;
 pub trait Number : Zero + One + Add<Output=Self> + Sub<Output=Self> +
                    Mul<Output=Self> + Div<Output=Self> + Rem<Output=Self> +
                    AddAssign<Self> + SubAssign<Self> + MulAssign<Self> +
-                   DivAssign<Self> + RemAssign<Self> + PartialEq +
+                   DivAssign<Self> + RemAssign<Self> + PartialEq + PartialOrd +
                    Copy + Clone + Debug + Display
 {
    type StrRadixError;
@@ -30,6 +30,32 @@ pub trait Number : Zero + One + Add<Output=Self> + Sub<Output=Self> +
 
 
 
+   ///
+   fn max(self, other: Self) -> Self
+   {
+      if self >= other
+      {
+         self
+      }
+      else
+      {
+         other
+      }
+   }
+
+   ///
+   fn min(self, other: Self) -> Self
+   {
+      if self <= other
+      {
+         self
+      }
+      else
+      {
+         other
+      }
+   }
+
    /// Create a number from a given string and base radix.
    ///
    ///```