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9827329
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2012-03-22T17:23:57.093
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2012-03-22T17:23:57.093
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If I don't got you wrong, the following code should fulfill your requirements (it's very basic, no error handling etc.): <pre><code>public enum Unit { Pound, Kilo, Kilometer, Mile } public class UnitMapping { public UnitMapping(Unit source, Unit target, double factor) { SourceUnit = source; TargetUnit = target; Factor = factor; } public Unit SourceUnit { get; private set; } public Unit TargetUnit { get; private set; } public double Factor { get; private set; } } public class UnitCalculator { public const string FILE_INPUT = @"Kilo,Pound,0.45359237 Kilometer,Mile,1.609344"; private List<UnitMapping> mappings; public UnitCalculator() { this.mappings = new List<UnitMapping>(); // parse the mappings foreach (var line in FILE_INPUT.Split(Environment.NewLine.ToCharArray(), StringSplitOptions.RemoveEmptyEntries)) { var fields = line.Split(','); var source = (Unit)Enum.Parse(typeof(Unit), fields[0]); var target = (Unit)Enum.Parse(typeof(Unit), fields[1]); double factor = double.Parse(fields[2], CultureInfo.InvariantCulture); this.mappings.Add(new UnitMapping(source, target, factor)); } } public double Convert(Unit source, Unit target, double value) { foreach (var mapping in this.mappings) { if (mapping.SourceUnit == source && mapping.TargetUnit == target) { return value * mapping.Factor; } else if (mapping.SourceUnit == target && mapping.TargetUnit == source) { return value * (1 / mapping.Factor); } } throw new InvalidOperationException("No mapping could be found for this conversion."); } } </code></pre> Invoke it like this: <pre><code>static void Main(string[] args) { var calc = new UnitCalculator(); Console.WriteLine(calc.Convert(Unit.Mile, Unit.Kilometer, 1)); } </code></pre> If you don't know the units, you can use strings as well.
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1. POArrays and measurement unit conversion
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1. USGene
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