C#/EnumerableMap.cs

   1 using System;
   2 using System.Collections.Generic;
   3
   4 namespace IEnumerableExtras
   5 {
   6     /// <summary>
   7     /// <see cref="IEnumerable{T}"/> map extension.
   8     /// </summary>
   9     public static class EnumerableMap
  10     {
  11         /// <summary>
  12         /// Produce new instance of <see cref="IEnumerable{TResult}"/> by applying
  13         /// predicate to each element in this instance of <see cref="IEnumerable{T}"/>.
  14         /// </summary>
  15         /// <typeparam name="T">This collection's item type.</typeparam>
  16         /// <typeparam name="TResult">Resulting collection item type.</typeparam>
  17         /// <param name="collection">This instance of <see cref="IEnumerable{T}"/>.</param>
  18         /// <param name="predicate">Function returnting objects of type <typeparamref name="TResult"/> based on objects of type <typeparamref name="T"/>.</param>
  19         /// <returns></returns>
  20         public static IEnumerable<TResult> Map< T, TResult >( this IEnumerable<T> collection, Func<T, TResult> predicate )
  21         {
  22             foreach ( var item in collection )
  23             {
  24                 yield return predicate( item );
  25             }
  26         }
  27     }
  28 }