1using System;
 2using System.Collections.Generic;
 3
 4namespace Notepad.Infrastructure.Extensions {
 5    public static class EnumerableExtensions {
 6        public static void Walk<T>(this IEnumerable<T> itemsToWalk) {
 7            foreach (var item in itemsToWalk) {}
 8        }
 9
10        public static IEnumerable<T> ThatSatisfy<T>(this IEnumerable<T> itemsToPeekInto, Predicate<T> criteriaToSatisfy) {
11            foreach (var item in itemsToPeekInto) {
12                if (item.Satisfies(criteriaToSatisfy)) {
13                    yield return item;
14                }
15            }
16        }
17
18        public static IEnumerable<T> SortedUsing<T>(this IEnumerable<T> itemsToSort, IComparer<T> sortingAlgorithm) {
19            var sortedItems = new List<T>(itemsToSort);
20            sortedItems.Sort(sortingAlgorithm);
21            return sortedItems;
22        }
23    }
24}