source: branches/HeuristicLab.Problems.BioBoost/HeuristicLab.Problems.BioBoost/3.3/Utils/DictionaryExtensions.cs @ 13075

Last change on this file since 13075 was 13075, checked in by gkronber, 7 years ago

#2499: added missing file DictionaryExtensions.cs

File size: 1.8 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.Collections.Generic;
24
25namespace HeuristicLab.BioBoost.Utils {
26  public static class DictionaryExtensions {
27
28    public static void ApplyAt<TKey, TValue>(this IDictionary<TKey, TValue> dict, TKey key, Action<TValue> f) {
29      TValue value;
30      if (dict.TryGetValue(key, out value)) {
31        f(value);
32      }
33    }
34
35    public static TReturn ApplyAt<TKey, TValue, TReturn>(this IDictionary<TKey, TValue> dict, TKey key, Func<TValue, TReturn> f, Func<TReturn> fnull) {
36      TValue value;
37      if (dict.TryGetValue(key, out value)) {
38        return f(value);
39      }
40      return fnull();
41    }
42
43    public static TValue ElementAtOrDefault<TKey, TValue>(this IDictionary<TKey, TValue> dict, TKey key, TValue defaultValue) {
44      TValue value;
45      if (dict.TryGetValue(key, out value)) {
46        return value;
47      } else {
48        return defaultValue;
49      }
50    }
51  }
52}
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