diff options
Diffstat (limited to 'src/dotnet-library/scala/Math.scala')
| -rw-r--r-- | src/dotnet-library/scala/Math.scala | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/src/dotnet-library/scala/Math.scala b/src/dotnet-library/scala/Math.scala index 4d03de9b77..ff85fe5b5d 100644 --- a/src/dotnet-library/scala/Math.scala +++ b/src/dotnet-library/scala/Math.scala @@ -1,6 +1,6 @@ /* __ *\ ** ________ ___ / / ___ Scala API ** -** / __/ __// _ | / / / _ | (c) 2002-2006, LAMP/EPFL ** +** / __/ __// _ | / / / _ | (c) 2002-2008, LAMP/EPFL ** ** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ ** ** /____/\___/_/ |_/____/_/ | | ** ** |/ ** @@ -11,9 +11,10 @@ package scala - -import Predef._ - +/** The object <code>Math</code> contains methods for performing basic numeric + * operations such as the elementary exponential, logarithm, square root, and + * trigonometric functions. + */ object Math { /** The smallest possible value for <a href="Byte.html" target="_self">scala.Byte</a>. */ @@ -117,14 +118,25 @@ object Math { def min(x: Float, y: Float): Float = System.Math.Min(x, y) def min(x: Double, y: Double): Double = System.Math.Min(x, y) + def signum(x: Double): Double = x match { case 0 => 0 + case y if y < 0 => -1.0 + case y if y > 0 => 1.0 } + def signum(x: Float): Float = x match { case 0f => 0f + case y if y < 0f => -1.0f + case y if y > 0f => 1.0f } + def signum(x: Long): Long = x match { case 0l => 0l + case y if y < 0l => -1l + case y if y > 0l => 1l } + def signum(x: Int): Int = x match { case 0 => 0 + case y if y < 0 => -1 + case y if y > 0 => 1} + // from Java 1.5 // def log10(x: Double): Double = java.lang.Math.log10(x) // def cbrt(x: Double): Double = java.lang.Math.cbrt(x) // def ulp(x: Double): Double = java.lang.Math.ulp(x) // def ulp(x: Float): Float = java.lang.Math.ulp(x) -// def signum(x: Double): Double = java.lang.Math.signum(x) -// def signum(x: Float): Float = java.lang.Math.signum(x) // def sinh(x: Double): Double = java.lang.Math.sinh(x) // def cosh(x: Double): Double = java.lang.Math.cosh(x) // def tanh(x: Double):Double = java.lang.Math.tanh(x) |