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POHow to Implement GetEnumerator method for class that implements IEnumerable<IEnumerable<T>>
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  1. POHow to Implement GetEnumerator method for class that implements IEnumerable<IEnumerable<T>>
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    copied!<p><strong>BACKGROUND:</strong> I created a generic <code>TimeSeries&lt;T&gt;</code> class that should implement the <code>IEnumerable&lt;IEnumerable&lt;T&gt;&gt;</code> interface:</p> <pre><code>public interface ITimeSeries&lt;T&gt; : IEnumerable&lt;IEnumerable&lt;T&gt;&gt; { T[,] DataMatrix { get; } DateTime[] DateTime { get; } string[] Variables { get; } } public class TimeSeries&lt;T&gt; : ITimeSeries&lt;T&gt; { public IEnumerator&lt;IEnumerable&lt;T&gt;&gt; GetEnumerator() {...} IEnumerator IEnumerable.GetEnumerator() { return GetEnumerator(); } } </code></pre> <p>The <code>TimeSeries&lt;T&gt;</code> class is 'internally' implemented as a matrix data structure with each column representing a different variable and each row an observation. There is also an additional <code>DateTime[]</code> array that represents the time axis.</p> <p>As a start I would like to be able to iterate through the <code>TimeSeries&lt;T&gt;</code> variable by variable with a <code>foreach</code> loop and also through all observations for a specific variable (with an inner <code>foreach</code> loop), but the actual reason for the IEnumerable interface implementation is to get all the features provided by LINQ through the <code>IEnumerable</code> interface, provided that I can somehow ensure that the DateTime association of each observation stays intact.</p> <p><strong>So for the question:</strong> How should I go about to implement the <code>GetEnumerator</code> method to achieve this?</p>
 

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