76 lines
2 KiB
C#
76 lines
2 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Security.Cryptography;
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using System.Threading.Tasks;
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public static class CollectionExtensions
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{
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// https://stackoverflow.com/a/800469
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public static string GetHashSHA1(this byte[] data)
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{
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using (var sha1 = new System.Security.Cryptography.SHA1CryptoServiceProvider())
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{
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return string.Concat(sha1.ComputeHash(data).Select(x => x.ToString("X2")));
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}
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}
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// https://stackoverflow.com/a/3188835
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public static T MaxBy<T, U>(this IEnumerable<T> items, Func<T, U> selector)
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{
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if (!items.Any())
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{
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throw new InvalidOperationException("Empty input sequence");
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}
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var comparer = Comparer<U>.Default;
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T maxItem = items.First();
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U maxValue = selector(maxItem);
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foreach (T item in items.Skip(1))
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{
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// Get the value of the item and compare it to the current max.
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U value = selector(item);
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if (comparer.Compare(value, maxValue) > 0)
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{
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maxValue = value;
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maxItem = item;
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}
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}
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return maxItem;
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}
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public static T MinBy<T, U>(this IEnumerable<T> items, Func<T, U> selector)
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{
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if (!items.Any())
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{
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throw new InvalidOperationException("Empty input sequence");
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}
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var comparer = Comparer<U>.Default;
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T maxItem = items.First();
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U maxValue = selector(maxItem);
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foreach (T item in items.Skip(1))
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{
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// Get the value of the item and compare it to the current max.
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U value = selector(item);
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if (comparer.Compare(value, maxValue) < 0)
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{
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maxValue = value;
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maxItem = item;
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}
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}
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return maxItem;
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}
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}
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public static class AsyncAwaitExtensions
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{
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public static async void WrapAwait(this Task task)
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{
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await task;
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}
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}
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