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PO
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Id
4822121
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CreationDate
2011-01-27T21:32:14.950
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2011-05-11T01:18:09.057
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2011-05-11T01:18:09.057
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590790
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590790
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4812338
PostTypeId
2
Score
1
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LastEditorDisplayName
text
Body
Because I have written something similar over and over again, I first wrote a class containing functions like: <pre><code> /// <summary> /// Calculate the position, of a given value, within a certain range/size /// depending on the minimum and maximum (scale) for the value. /// </summary> /// <param name="data">Value for which to calculate the position.</param> /// <param name="minimum_value">Minimum value of the scale on which the value must lie.</param> /// <param name="maximum_value">Maximum value of the scale on which the value must lie.</param> /// <param name="size_begin">The begin value of the size on which the scale must be spread.</param> /// <param name="size_end">The end value of the size on which the scale must be spread.</param> /// <returns>The respectively positions of the data value.</returns> static public double Position_In_Size(double data, double minimum_value, double maximum_value, double size_begin, double size_end) { return size_begin + (((size_end - size_begin) / (maximum_value - minimum_value)) * (data - minimum_value)); } </code></pre> This quickly became a really big class, in order to support all kind of types. C# doesn't support generics for value types out of the box. Recently I found a library which implements generics in .NET with a workaround. Using this library I now have a cleaner implementation. Using a generic interval class, I can 'map' values from one range to another, independant of type. <pre><code>// Result will be 0. Interval<int> interval = new Interval<int>( 0, 10 ); double result = interval.Map<double>( 5, new Interval<double>( -100, 100 ) ); </code></pre> I wrote this as part of some interpolation classes I was working on: <a href="http://whathecode.wordpress.com/2011/01/24/interpolation-no-more/" rel="nofollow">http://whathecode.wordpress.com/2011/01/24/interpolation-no-more/</a> The source code can be found in my <a href="http://whathecode.wordpress.com/fcl-extension/" rel="nofollow">FCL Extension library</a>, in the namespace Whathecode.System.Arithmetic.Range.
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