Changeset 17350 for trunk/HeuristicLab.Common/3.3

Timestamp:

11/13/19 14:50:26 (4 years ago)

Author:

chaider

Message:

#3032

• Added IsAlmost method with an epsilon parameter
• Added check for floating point issues at interval constructor
• Updated absolute operator (jump over zero between lower and upper bound)
• Updated analytical quotient to use already implemented operators to build it
• Updated test cases for operators
• Refactored test method names

File:

• trunk/HeuristicLab.Common/3.3/DoubleExtensions.cs (modified) (1 diff)

trunk/HeuristicLab.Common/3.3/DoubleExtensions.cs

@@ -23 +23 @@
 namespace HeuristicLab.Common {
   public static class DoubleExtensions {
+    /// <summary>
+    /// Compares the similarity of value x and value y with a precision of 1.0E-12.
+    /// </summary>
+    /// <param name="x">First double value to be checked</param>
+    /// <param name="y">Second double value to compare with</param>
+    /// <returns></returns>
     public static bool IsAlmost(this double x, double y) {
+      var epsilon = 1.0E-12;
+      return IsAlmost(x, y, epsilon);
+    }
+
+    /// <summary> 
+    /// Compares the similarity of value x and value y with a given precision (epsilon).
+    /// </summary>
+    /// <param name="x">First double value to be checked</param>
+    /// <param name="y">Second double value to compare with</param>
+    /// <param name="epsilon">Error term to specify the precision</param>
+    /// <returns></returns>
+    public static bool IsAlmost(this double x, double y, double epsilon) {
       if (double.IsInfinity(x)) {
         if (x > 0) return double.IsPositiveInfinity(y);
         else return double.IsNegativeInfinity(y);
       } else {
-        return Math.Abs(x - y) < 1.0E-12;
+        return Math.Abs(x - y) < epsilon;
       }
     }