本文整理汇总了C#中Func.Select方法的典型用法代码示例。如果您正苦于以下问题：C# Func.Select方法的具体用法？C# Func.Select怎么用？C# Func.Select使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Func的用法示例。
在下文中一共展示了Func.Select方法的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: GenerateSql
public string[] GenerateSql(IStructureSchema structureSchema, IndexesTableNames names, IndexesTableStatuses statuses)
{
if(statuses.AllExists)
return new string[0];
var structureTableName = structureSchema.GetStructureTableName();
var sqlTemplateNameSuffix = GetSqlTemplateNameSuffix(structureSchema.IdAccessor.IdType);
var generators = new Func<string>[]
{
() => !statuses.IntegersTableExists
? GenerateSqlFor("CreateIntegersIndexes", sqlTemplateNameSuffix, structureTableName, names.IntegersTableName)
: string.Empty,
() => !statuses.FractalsTableExists
? GenerateSqlFor("CreateFractalsIndexes", sqlTemplateNameSuffix, structureTableName, names.FractalsTableName)
: string.Empty,
() => !statuses.BooleansTableExists
? GenerateSqlFor("CreateBooleansIndexes", sqlTemplateNameSuffix, structureTableName, names.BooleansTableName)
: string.Empty,
() => !statuses.DatesTableExists
? GenerateSqlFor("CreateDatesIndexes", sqlTemplateNameSuffix, structureTableName, names.DatesTableName)
: string.Empty,
() => !statuses.GuidsTableExists
? GenerateSqlFor("CreateGuidsIndexes", sqlTemplateNameSuffix, structureTableName, names.GuidsTableName)
: string.Empty,
() => !statuses.StringsTableExists
? GenerateSqlFor("CreateStringsIndexes", sqlTemplateNameSuffix, structureTableName, names.StringsTableName)
: string.Empty,
() => !statuses.TextsTableExists
? GenerateSqlFor("CreateTextsIndexes", sqlTemplateNameSuffix, structureTableName, names.TextsTableName)
: string.Empty
};
return generators.Select(generator => generator()).Where(s => !string.IsNullOrWhiteSpace(s)).ToArray();
}示例2: Cozy
public static void Cozy()
{
Console.WriteLine("\n-----------------------------------------------");
Console.WriteLine(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType.FullName);
Console.WriteLine("-----------------------------------------------");
//匿名类在使用linq做数据处理的时候非常有用
//例如有一个Model类型是和数据库某张表的结构完全一致，但在UI上面需要呈现的数据不需要那么多
//或者需要两个字段拼接成一个绑定UI上面，匿名类的用处就体现出来了
//创建一个List<Model>的数据源
var dataSource = new Func<List<Model>>(() =>
{
return Enumerable.Range(0, 20).Select(x => new Model
{
Id = x,
FirstName = string.Format("FirstName{0}", x),
LastName = string.Format("LastName{0}", x)
}).ToList();
})();
//通过Select()返回一个List<AnonymousType>对象，打印出来
dataSource.Select(x => new {Number = x.Id, Name = x.FirstName + x.LastName , 年龄 = x.Age}).ToList().ForEach(x =>
Console.WriteLine("编号：{0} \t姓名:{1} \t年龄:{2}", x.Number, x.Name, x.年龄));
}示例3: CalculateResult
public override object CalculateResult()
{
var operations = new Func<Fraction, Fraction, Fraction>[]
{
(a, b) => a + b,
(a, b) => a - b,
(a, b) => a * b,
(a, b) => a / b,
};
return new Range(1, 9, true)
.GetCombinations(4)
.Select(digits => digits
.GetPermutations()
.Select(p => new
{
a = p[0],
b = p[1],
c = p[2],
d = p[3],
})
.SelectMany(p => new Range(3)
.Aggregate(new[] { Enumerable.Empty<Func<Fraction, Fraction, Fraction>>() }.AsEnumerable(),
(a, i) =>
a.SelectMany(s => operations
.Select(o => s.AppendItem(o))),
a => a
.Select(s => s
.ToArray())
.ToArray())
.Select(o => new
{
x = o[0],
y = o[1],
z = o[2],
})
.SelectMany(o => new[]
{
o.x(o.y(o.z(p.a, p.b), p.c), p.d),
o.x(o.y(p.a, p.b), o.z(p.c, p.d)),
o.x(o.y(p.a, o.z(p.b, p.c)), p.d),
o.x(p.a, o.y(o.z(p.b, p.c), p.d)),
o.x(p.a, o.y(p.b, o.z(p.c, p.d)))
}))
.Let(r => new
{
Digits = digits,
Count = r
.Where(v => v > 0 && v.IsInteger)
.Distinct()
.OrderBy(v => v)
.ToMemorableEnumerable()
.TakeWhile(e => !e.HasPreviousValue || e.Value == e.PreviousValue + 1)
.Count()
}))
.WithMax(x => x.Count)
.Digits
.StringJoin("");
}示例4: NounsSearch
public static void NounsSearch()
{
var voc = Program.DefaultVocabulary;
var mainWords = voc.GetAllInfos().Where(s => s.PartOfSpeach == "V").Select(s=> s.Stem);
var searcher = new Symptoms(voc, mainWords, "S");
var questionList = Program.DefaultQuestionList;
var symptoms = new Func<List<InvertedIndexUnit>>(()=> searcher
.GetSymptomsIndex(questionList.GetAllQuestions().Select(item => Tuple.Create(item.Id, item.WholeText)))
.ToList()).DetectTime("nouns found");
File.WriteAllLines("nouns_verbs.txt", symptoms.Select(s => s.ToStringCount()));
}示例5: JsonReaderUtils
/// <summary>
/// Class constructor.
/// </summary>
static JsonReaderUtils()
{
var readSizes = new int[][]
{
new int[] { Int32.MaxValue },
new int[] { 1 },
new int[] { 1, 7, 101 }
};
Func<TextReader, AssertionHandler, JsonReader>[] creatorFuncs = new Func<TextReader, AssertionHandler, JsonReader>[]
{
(textReader, assert) => new JsonReader(textReader, assert, ODataFormat.Json, isIeee754Compatible: true),
(textReader, assert) => new BufferingJsonReader(textReader, ODataConstants.DefaultMaxRecursionDepth, assert, ODataFormat.Json, isIeee754Compatible: true),
(textReader, assert) =>
{
BufferingJsonReader reader = new BufferingJsonReader(textReader, ODataConstants.DefaultMaxRecursionDepth, assert, ODataFormat.Json, isIeee754Compatible: true);
reader.StartBuffering();
return reader;
},
};
allTestConfigurations = readSizes.SelectMany(rs =>
creatorFuncs.Select(f => new JsonReaderTestConfiguration { ReadSizes = rs, JsonReaderCreatorFunc = f }));
}示例6: IsConform
public static bool IsConform(IEquationBuilder subject)
{
var callingTests = new Action<IEquationBuilder>[] {
s => s.Value(0),
s => s.Literal("x"),
s => s.Add(),
s => s.Divide(),
s => s.Divide(b => { }),
s => s.Parentheses(b => { })
};
Func<Action<IEquationBuilder>, bool> callingTestWrapper = test => {
var passed = true;
try
{
test(subject);
}
catch (RuntimeBinderException)
{
passed = false;
}
return passed;
};
var searchingTest = new Func<IEquationBuilder, MethodInfo>[]
{
s => s.GetType().GetMethod("CreateItem", new Type[] { typeof(IIdentifier) }),
s => s.GetType().GetMethod("CreateItem", new Type[] { typeof(IIdentifier), typeof(IItem).MakeByRefType() })
};
Func<Func<IEquationBuilder, MethodInfo>, bool> searchingTestWrapper = test => test(subject) != null;
return callingTests.Select(callingTestWrapper)
.Concat(searchingTest.Select(searchingTestWrapper))
.All(result => result == true);
}示例7: Can_use_sequence_end_to_end_from_multiple_contexts_concurrently_async
// [ConditionalFact] Currently disabled due to GitHub issue #266
public async Task Can_use_sequence_end_to_end_from_multiple_contexts_concurrently_async()
{
var serviceProvider = new ServiceCollection()
.AddEntityFrameworkSqlServer()
.BuildServiceProvider();
using (var context = new BronieContext(serviceProvider, "ManyBronies"))
{
context.Database.EnsureDeleted();
context.Database.EnsureCreated();
}
const int threadCount = 50;
var tests = new Func<Task>[threadCount];
for (var i = 0; i < threadCount; i++)
{
var closureProvider = serviceProvider;
tests[i] = () => AddEntitiesAsync(closureProvider, "ManyBronies");
}
var tasks = tests.Select(Task.Run).ToArray();
foreach (var t in tasks)
{
await t;
}
using (var context = new BronieContext(serviceProvider, "ManyBronies"))
{
var pegasuses = await context.Pegasuses.ToListAsync();
for (var i = 0; i < 50; i++)
{
Assert.Equal(threadCount, pegasuses.Count(p => p.Name == "Rainbow Dash " + i));
Assert.Equal(threadCount, pegasuses.Count(p => p.Name == "Fluttershy " + i));
}
}
}示例8: Multiple_threads_can_use_the_same_generator_async
public async Task Multiple_threads_can_use_the_same_generator_async()
{
var configMock = new Mock<DbContextConfiguration>();
configMock.Setup(m => m.Connection).Returns(new Mock<RelationalConnection>().Object);
var entryMock = new Mock<StateEntry>();
entryMock.Setup(m => m.Configuration).Returns(configMock.Object);
var executor = new FakeSqlStatementExecutor(10);
var generator = new SqlServerSequenceValueGenerator(executor, "Foo", 10);
const int threadCount = 50;
const int valueCount = 35;
var tests = new Func<Task>[threadCount];
var generatedValues = new List<long>[threadCount];
for (var i = 0; i < tests.Length; i++)
{
var testNumber = i;
generatedValues[testNumber] = new List<long>();
tests[testNumber] = async () =>
{
for (var j = 0; j < valueCount; j++)
{
generatedValues[testNumber].Add((long)await generator.NextAsync(entryMock.Object, CreateProperty(typeof(long))));
}
};
}
var tasks = tests.Select(Task.Run).ToArray();
foreach (var t in tasks)
{
await t;
}
// Check that each value was generated once and only once
var checks = new bool[threadCount * valueCount];
foreach (var values in generatedValues)
{
Assert.Equal(valueCount, values.Count);
foreach (var value in values)
{
checks[value] = true;
}
}
Assert.True(checks.All(c => c));
}示例9: TryDetectFramework
private bool TryDetectFramework(string content, PathType pathType, ChutzpahTestSettingsFile chutzpahTestSettings, out IFrameworkDefinition definition)
{
var strategies = new Func<IFrameworkDefinition>[]
{
// Check chutzpah settings
() => frameworkDefinitions.FirstOrDefault(x => x.FrameworkKey.Equals(chutzpahTestSettings.Framework, StringComparison.OrdinalIgnoreCase)),
// Check if we see an explicit reference to a framework file (e.g. <reference path="qunit.js" />)
() => frameworkDefinitions.FirstOrDefault(x => x.FileUsesFramework(content, false, pathType)),
// Check using basic heuristic like looking for test( or module( for QUnit
() => frameworkDefinitions.FirstOrDefault(x => x.FileUsesFramework(content, true, pathType))
};
definition = strategies.Select(x => x()).FirstOrDefault(x => x != null);
return definition != null;
}示例10: AtomResourceCollectionMetadataTest
public void AtomResourceCollectionMetadataTest()
{
var testCases = new[]
{
// No title specified - an empty one is used as it's required by the spec.
new
{
CustomizeMetadata = (Action<ODataEntitySetInfo>)(collection => {
AtomResourceCollectionMetadata metadata = collection.Atom();
}),
Xml = "<Collection><title xmlns='http://www.w3.org/2005/Atom'/></Collection>"
},
// Simple title (other titles are tested in AtomTextConstructMetadataTests)
new
{
CustomizeMetadata = (Action<ODataEntitySetInfo>)(collection => {
AtomResourceCollectionMetadata metadata = collection.Atom();
metadata.Title = new AtomTextConstruct { Text = "collection title" };
}),
Xml = "<Collection><title type='text' xmlns='http://www.w3.org/2005/Atom'>collection title</title></Collection>"
},
// With accept
new
{
CustomizeMetadata = (Action<ODataEntitySetInfo>)(collection => {
AtomResourceCollectionMetadata metadata = collection.Atom();
metadata.Title = "collection title";
metadata.Accept = "mime/type";
}),
Xml = "<Collection><title type='text' xmlns='http://www.w3.org/2005/Atom'>collection title</title><accept xmlns='http://www.w3.org/2007/app'>mime/type</accept></Collection>"
},
// With empty accept
new
{
CustomizeMetadata = (Action<ODataEntitySetInfo>)(collection => {
AtomResourceCollectionMetadata metadata = collection.Atom();
metadata.Title = "collection title";
metadata.Accept = string.Empty;
}),
Xml = "<Collection><title type='text' xmlns='http://www.w3.org/2005/Atom'>collection title</title><accept xmlns='http://www.w3.org/2007/app'></accept></Collection>"
},
// With categories
new
{
CustomizeMetadata = (Action<ODataEntitySetInfo>)(collection => {
AtomResourceCollectionMetadata metadata = collection.Atom();
metadata.Title = "collection title";
metadata.Categories = new AtomCategoriesMetadata();
}),
Xml = "<Collection><title type='text' xmlns='http://www.w3.org/2005/Atom'>collection title</title><categories xmlns='http://www.w3.org/2007/app' /></Collection>"
},
// With accept and categories
new
{
CustomizeMetadata = (Action<ODataEntitySetInfo>)(collection => {
AtomResourceCollectionMetadata metadata = collection.Atom();
metadata.Title = "collection title";
metadata.Accept = "mime/type";
metadata.Categories = new AtomCategoriesMetadata();
}),
Xml = "<Collection><title type='text' xmlns='http://www.w3.org/2005/Atom'>collection title</title><accept xmlns='http://www.w3.org/2007/app'>mime/type</accept><categories xmlns='http://www.w3.org/2007/app' /></Collection>"
},
};
Func<ODataEntitySetInfo>[] collectionCreators = new Func<ODataEntitySetInfo>[]
{
() => new ODataEntitySetInfo { Url = new Uri("http://odata.org/url") },
() => { var collection = new ODataEntitySetInfo { Url = new Uri("http://odata.org/url") }; collection.SetAnnotation(new AtomResourceCollectionMetadata()); return collection; }
};
var testDescriptors = testCases.SelectMany(testCase =>
collectionCreators.Select(collectionCreator =>
{
ODataEntitySetInfo collection = collectionCreator();
testCase.CustomizeMetadata(collection);
ODataServiceDocument serviceDocument = new ODataServiceDocument { EntitySets = new[] { collection } };
return new PayloadWriterTestDescriptor<ODataServiceDocument>(
this.Settings,
new[] { serviceDocument },
tc => new AtomWriterTestExpectedResults(this.Settings.ExpectedResultSettings)
{
Xml = testCase.Xml,
FragmentExtractor = result =>
new XElement("Collection",
result
.Element(TestAtomConstants.AtomPublishingXNamespace + TestAtomConstants.AtomPublishingWorkspaceElementName)
.Element(TestAtomConstants.AtomPublishingXNamespace + TestAtomConstants.AtomPublishingCollectionElementName)
.Elements())
});
}));
this.CombinatorialEngineProvider.RunCombinations(
testDescriptors,
this.WriterTestConfigurationProvider.AtomFormatConfigurations.Where(tc => !tc.IsRequest),
(testDescriptor, testConfiguration) =>
{
testConfiguration = testConfiguration.Clone();
testConfiguration.MessageWriterSettings.SetServiceDocumentUri(ServiceDocumentUri);
TestWriterUtils.WriteAndVerifyTopLevelContent(
testDescriptor,
//.........这里部分代码省略.........
示例11: GetVisualStudioPath
/// <summary>
/// Look for Visual Studio
/// </summary>
/// <param name="runningInVisualStudio">True if running in Visual Studio</param>
/// <returns>Path to Visual Studio install root.</returns>
private static string GetVisualStudioPath(out bool runningInVisualStudio)
{
var processNameCommandLine = s_getProcessFromCommandLine();
var processNameCurrentProcess = s_getProcessFromRunningProcess();
// Check to see if we're running inside of Visual Studio
runningInVisualStudio = IsProcessInList(processNameCommandLine, s_visualStudioProcess) ||
IsProcessInList(processNameCurrentProcess, s_visualStudioProcess);
// Define the order in which we will look for Visual Studio. Stop when the first instance
// is found.
var possibleLocations = new Func<string>[]
{
() => TryGetVsFromProcess(processNameCommandLine),
() => TryGetVsFromProcess(processNameCurrentProcess),
() => TryGetVsFromEnvironment(),
() => TryGetVsFromInstalled(),
() => TryGetVsFromMSBuildLocation(processNameCommandLine),
() => TryGetVsFromMSBuildLocation(processNameCurrentProcess)
};
return possibleLocations.Select(location => location()).FirstOrDefault(path => !string.IsNullOrEmpty(path));
}示例12: TryDetectFramework
private bool TryDetectFramework(PathInfo path, ChutzpahTestSettingsFile chutzpahTestSettings, out IFrameworkDefinition definition)
{
// TODO: Deprecate the fallback approach
Lazy<string> fileText = new Lazy<string>(() =>
{
string firstTestFileText;
if (path.Type == PathType.Url)
{
firstTestFileText = httpClient.GetContent(path.FullPath);
}
else
{
firstTestFileText = fileSystem.GetText(path.FullPath);
}
return firstTestFileText;
});
var strategies = new Func<IFrameworkDefinition>[]
{
// Check chutzpah settings
() => frameworkDefinitions.FirstOrDefault(x => x.FrameworkKey.Equals(chutzpahTestSettings.Framework, StringComparison.OrdinalIgnoreCase)),
// Check if we see an explicit reference to a framework file (e.g. <reference path="qunit.js" />)
() => frameworkDefinitions.FirstOrDefault(x => x.FileUsesFramework(fileText.Value, false, path.Type)),
// Check using basic heuristic like looking for test( or module( for QUnit
() => frameworkDefinitions.FirstOrDefault(x => x.FileUsesFramework(fileText.Value, true, path.Type))
};
definition = strategies.Select(x => x()).FirstOrDefault(x => x != null);
return definition != null;
}示例13: CreateTokensIterator
private static IEnumerable<string> CreateTokensIterator(TextReader self, TextReaderRocksOptions options, Func<char?, char, bool>[] categories)
{
try {
var cats = categories.Select (
c => Lambda.F ((StringBuilder buf, char ch) =>
c (buf.Length == 0 ? ((char?) null) : (char?) buf [buf.Length-1], ch)));
foreach (var t in Chars (self).Tokens (
new StringBuilder (),
(buf, c) => buf.Append (c),
buf => {
var r = buf.ToString ();
buf.Length = 0;
return Tuple.Create (r, buf);
},
cats.ToArray ()))
yield return t;
} finally {
if ((options & TextReaderRocksOptions.CloseReader) != 0) {
self.Close ();
self.Dispose ();
}
}
}示例14: createMultiTask
private Func<Task> createMultiTask(Func<Task>[] taskRunners)
{
return () =>
{
var tasks = taskRunners.Select(fn => fn());
return Task.WhenAll(tasks);
};
}示例15: LinearCombination
/// <summary>
/// 引数に指定された基底と重みの線形結合を取る。
/// </summary>
public static Func<double, double> LinearCombination(Func<double, double>[] basis, double[] weights)
{
Debug.Assert(basis.Length == weights.Length, "There are not enough basis or weights for linear combination!");
return x => basis.Select((b, i) => weights[i] * b(x)).Sum();
}