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Categories / C# / Collections Data Structure

 

Creates a list by combining two other lists into one

using System.Linq; using System.Diagnostics; namespace System.Collections.Generic {     public static class EnumeratorExtensions     {         /// <summary>         /// Creates a list by combining two other lists into one.         /// </summary>         /// <typeparam name="T1"></typeparam>         /// <typeparam name="T2"></typeparam>         /// <typeparam name="TResult"></typeparam>         /// <param name="source1">One of the lists to zip.</param>         /// <param name="source2">One of the lists to zip.</param>         /// <param name="zipFunction">The delegate used to combine items.</param>         /// <returns>A new list with the combined items.</returns>         public static IEnumerable<TResult> Zip<T1, T2, TResult>(this IEnumerable<T1> source1, IEnumerable<T2> source2, Func<T1, T2, TResult> combine)         {             if (source1 == null)                 throw new ArgumentNullException("source1");             if (source2 == null)                 throw new ArgumentNullException("source2");             if (combine == null)                 throw new ArgumentNullException("combine");             return ZipIterator<T1, T2, TResult>(source1, source2, combine);         }         private static IEnumerable<TResult> ZipIterator<T1, T2, TResult>(IEnumerable<T1> source1, IEnumerable<T2> source2, Func<T1, T2, TResult> combine)         {             Debug.Assert(source1 != null, "source1 is null.");             Debug.Assert(source2 != null, "source2 is null.");             Debug.Assert(combine != null, "combine is null.");             using (IEnumerator<T1> data1 = source1.GetEnumerator())             using (IEnumerator<T2> data2 = source2.GetEnumerator())                 while (data1.MoveNext() && data2.MoveNext())                 {                     yield return combine(data1.Current, data2.Current);                 }         }     } }