public void Chaining_Dictionary() { var dict = new System.Collections.Generic.Dictionary <int, int> { [1] = 2, [3] = 4 }; var sortedDict = new System.Collections.Generic.SortedDictionary <int, int> { [1] = 2, [3] = 4 }; System.Collections.Generic.KeyValuePair <int, int> dictKvp = default(System.Collections.Generic.KeyValuePair <int, int>); foreach (var kv in dict) { dictKvp = kv; break; } System.Collections.Generic.KeyValuePair <int, int> sortedDictKvp = default(System.Collections.Generic.KeyValuePair <int, int>); foreach (var kv in sortedDict) { sortedDictKvp = kv; break; } Assert.AreEqual(dictKvp, dict.First()); Assert.AreEqual(dictKvp, dict.First(x => true)); Assert.AreEqual(dictKvp, dict.FirstOrDefault()); Assert.AreEqual(dictKvp, dict.FirstOrDefault(x => true)); Assert.AreEqual(sortedDictKvp, sortedDict.First()); Assert.AreEqual(sortedDictKvp, sortedDict.First(x => true)); Assert.AreEqual(sortedDictKvp, sortedDict.FirstOrDefault()); Assert.AreEqual(sortedDictKvp, sortedDict.FirstOrDefault(x => true)); }
public void Chaining_Dictionary() { var dict = new System.Collections.Generic.Dictionary <int, int> { [1] = 2, [3] = 4 }; var sortedDict = new System.Collections.Generic.SortedDictionary <int, int> { [1] = 2, [3] = 4 }; Assert.IsTrue(dict.Contains(dict.First())); Assert.IsTrue(dict.Contains(dict.First(), null)); Assert.IsTrue(sortedDict.Contains(sortedDict.First())); Assert.IsTrue(sortedDict.Contains(sortedDict.First(), null)); }
public void Errors_Dictionary() { var dict = new System.Collections.Generic.Dictionary <int, int> { [1] = 2, [3] = 4 }; var sortedDict = new System.Collections.Generic.SortedDictionary <int, int> { [1] = 2, [3] = 4 }; try { dict.First(null); Assert.Fail(); }catch (ArgumentNullException exc) { Assert.AreEqual("predicate", exc.ParamName); } try { dict.FirstOrDefault(null); Assert.Fail(); } catch (ArgumentNullException exc) { Assert.AreEqual("predicate", exc.ParamName); } try { sortedDict.First(null); Assert.Fail(); } catch (ArgumentNullException exc) { Assert.AreEqual("predicate", exc.ParamName); } try { sortedDict.FirstOrDefault(null); Assert.Fail(); } catch (ArgumentNullException exc) { Assert.AreEqual("predicate", exc.ParamName); } }
public void Chaining_Dictionary() { var dict = new System.Collections.Generic.Dictionary <int, int> { [1] = 2, [3] = 4 }; var sortedDict = new System.Collections.Generic.SortedDictionary <int, int> { [1] = 2, [3] = 4 }; Assert.IsTrue(dict.SequenceEqual(dict.DefaultIfEmpty())); Assert.IsTrue(dict.SequenceEqual(dict.DefaultIfEmpty(dict.First()))); Assert.IsTrue(sortedDict.SequenceEqual(sortedDict.DefaultIfEmpty())); Assert.IsTrue(sortedDict.SequenceEqual(sortedDict.DefaultIfEmpty(sortedDict.First()))); }
/// <summary> /// This Function delivers the first (means: oldest) VALID file in the list (if checkFileValidity is true). /// This flag can be changed to false (or removed) if it is assured that only valid files are deployed in the import folder. /// </summary> /// <param name="files">List of strings with the filenames</param> /// <param name="checkFileValidity">bool. if set to true (default) this will perform a simple validity check.</param> /// <returns>string with the oldest file.</returns> public static string GetOldestFile(List <string> files) { SortedDictionary <DateTime?, string> sortedFiles = new System.Collections.Generic.SortedDictionary <DateTime?, string>(); foreach (string file in files) { DateTime?date = ParseSenderDate(file); if (date == null) { continue; } if (Parser.AxisReader2.CheckFileIsValid(file)) { sortedFiles.Add(date, file); } } return(sortedFiles.Count > 0 ? sortedFiles.First().Value : null); }