Last change
on this file since 17104 was
15017,
checked in by pkimmesw, 8 years ago
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#2665 Fixed Benchmark Problem Definition, Converted LoopExpressions to stateless expressions, Added several unit test to ensure funcionality, Fixed UI bugs
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File size:
938 bytes
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1 | using System.Collections.Generic;
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2 |
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3 | namespace HeuristicLab.Problems.ProgramSynthesis.Push.Extensions {
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4 | using HeuristicLab.Core;
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5 | using HeuristicLab.Random;
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6 |
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7 | public static class CollectionExtensions {
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8 | public static T Random<T>(this IReadOnlyList<T> source, IRandom random = null) {
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9 | random = random ?? new MersenneTwister();
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10 | var x = random.Next(source.Count);
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11 |
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12 | return source[x];
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13 | }
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14 |
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15 | public static int HashCode<T>(this IReadOnlyList<T> source) {
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16 | var hash = 19 * 31 + typeof(T).FullName.GetHashCode();
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17 |
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18 | for (var i = 0; i < source.Count; i++)
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19 | hash = hash * 31 + source[i].GetHashCode();
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20 |
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21 | return hash;
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22 | }
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23 |
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24 | public static int HashCode<T>(this IEnumerable<T> source) {
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25 | var hash = 19 * 31 + typeof(T).FullName.GetHashCode();
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26 |
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27 | foreach (var item in source)
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28 | hash = hash * 31 + item.GetHashCode();
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29 |
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30 | return hash;
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31 | }
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32 | }
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33 | }
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