{"id":3175,"date":"2017-04-06T06:00:32","date_gmt":"2017-04-06T13:00:32","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=3175"},"modified":"2025-06-13T20:57:09","modified_gmt":"2025-06-14T03:57:09","slug":"csharp-tuples-new-csharp-7-feature","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/es\/csharp-tuples-new-csharp-7-feature\/","title":{"rendered":"Tuplas C#: Nuevo lenguaje C# 7"},"content":{"rendered":"
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Las tuplas C# son una nueva caracter\u00edstica de C# 7. Voy a mostrar los conceptos b\u00e1sicos de c\u00f3mo funcionan las tuplas C#. Tambi\u00e9n voy a mezclar un poco de Couchbase para mostrar las tuplas en acci\u00f3n. Sin embargo, si no quieres instalar Couchbase<\/a> s\u00f3lo para jugar con tuplas, no te preocupes, podr\u00e1s seguirlo.<\/p>\n<\/div>\n

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En el c\u00f3digo fuente que utilizo para esta entrada del blog est\u00e1 disponible en GitHub<\/a> para que lo pruebes si quieres.<\/p>\n<\/div>\n

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Nota: Si hace tiempo que utiliza C#, es posible que recuerde la funci\u00f3n Clase Tuple que se introdujo en .NET 4<\/a>. Esa clase sigue existiendo, pero no es lo mismo que la nueva funci\u00f3n de tupla de C#.<\/em><\/p>\n<\/div>\n

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\u00bfQu\u00e9 son las tuplas C#?<\/h2>\n
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Una \"tupla\" es un concepto matem\u00e1tico que no es m\u00e1s que una lista de elementos. En la familia de lenguajes LISP, la codificaci\u00f3n se basa casi exclusivamente en la idea de que todo es una lista. Una vez m\u00e1s, C# toma prestada una idea del mundo de la programaci\u00f3n funcional y la integra en un lenguaje no funcional. As\u00ed, obtenemos las tuplas C# (echa un vistazo a la etiqueta propuesta original de tupla C# de Mads Torgersen<\/a> para m\u00e1s detalles y antecedentes).<\/p>\n<\/div>\n

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\u00bfTe acuerdas de los tipos an\u00f3nimos?<\/h3>\n
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Pero, para simplificarlo, consideremos algo con lo que quiz\u00e1 ya est\u00e9s familiarizado en C#, un tipo an\u00f3nimo. Para repasar, puedes instanciar un nuevo objeto sin especificar un tipo:<\/p>\n<\/div>\n

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var myObject = new { Foo = \"bar\", Baz = 123 };<\/code><\/pre>\n<\/div>\n<\/div>\n
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Entre bastidores, en realidad es<\/em> un tipo que hereda de la base Objeto<\/code> pero, en general, s\u00f3lo nos ocupamos del objeto, no de su tipo.<\/p>\n<\/div>\n
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Adem\u00e1s, no puedo devolver un tipo an\u00f3nimo de un m\u00e9todo, o pasar un tipo an\u00f3nimo como par\u00e1metro sin perder la informaci\u00f3n de tipo en el proceso.<\/p>\n<\/div>\n
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private object GetAnonymousObject()\r\n{\r\n    return new {Foo = \"bar\", Baz = 123};\r\n}\r\n\r\nprivate void AnotherMethod()\r\n{\r\n    var obj = GetAnonymousObject();\r\n    Console.WriteLine(obj.Foo); \/\/ compiler error :(\r\n}<\/code><\/pre>\n<\/div>\n<\/div>\n
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Son \u00fatiles, sin duda, pero generalmente me refiero a ellas como an\u00f3nimas objetos<\/em> como yo las uso, por estas razones.<\/p>\n<\/div>\n<\/div>\n
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\u00bfQu\u00e9 tiene esto que ver con las tuplas C#?<\/h3>\n
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Pienso en las tuplas C# como una forma de hacer que C# devuelva tipos an\u00f3nimos, pero con informaci\u00f3n m\u00e1s rica. Son una forma de crear una \"clase\" sobre la marcha sin definir realmente una clase. La sintaxis de las tuplas consiste simplemente en poner entre par\u00e9ntesis una lista de tipos y nombres separados por comas. Un literal de tupla no es m\u00e1s que una lista de literales separados por comas y tambi\u00e9n rodeados de par\u00e9ntesis. Por ejemplo:<\/p>\n<\/div>\n
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(string FirstName, string LastName) myTuple = (\"Matt\", \"Groves\");\r\n\r\nConsole.WriteLine(myTuple.FirstName); \/\/ no compiler error :)\r\nConsole.WriteLine(myTuple.LastName);  \/\/ no compiler error :)<\/code><\/pre>\n<\/div>\n<\/div>\n
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Nota: Ahora mismo prefiero PascalCase para las propiedades de las tuplas. No s\u00e9 si es la pauta oficial o no, pero a m\u00ed me \"parece\" correcta.<\/em><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Tuplas C# en acci\u00f3n<\/h2>\n
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He puesto a trabajar tuples en una sencilla aplicaci\u00f3n de consola que interact\u00faa con Couchbase.<\/p>\n<\/div>\n
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He creado un BucketHelper<\/code> que es una fachada muy simple sobre la clase normal de Couchbase IBucket<\/code>. Esta clase tiene dos m\u00e9todos: uno para obtener un documento por clave y devolver una tupla, y otro para insertar una tupla como documento.<\/p>\n<\/div>\n
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public class BucketHelper\r\n{\r\n    private readonly IBucket _bucket;\r\n\r\n    public BucketHelper(IBucket bucket)\r\n    {\r\n        _bucket = bucket;\r\n    }\r\n\r\n    public (string Key, T obj) GetTuple<T>(string key)\r\n    {\r\n        var doc = _bucket.Get<T>(key);\r\n        return (doc.Id, doc.Value);\r\n    }\r\n\r\n    public void InsertTuple<T>((string Key, T obj) tuple)\r\n    {\r\n        _bucket.Insert(new Document<T>\r\n        {\r\n            Id = tuple.Key,\r\n            Content = tuple.obj\r\n        });\r\n    }\r\n}<\/code><\/pre>\n<\/div>\n<\/div>\n
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Para instanciar este helper, basta con pasarle un archivo IBucket<\/code> en el constructor.<\/p>\n<\/div>\n
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Tuple como tipo de retorno<\/h3>\n
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A continuaci\u00f3n, puede utilizar la funci\u00f3n GetTuple<\/code> para obtener un documento de Couchbase como una tupla.<\/p>\n<\/div>\n
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var bucketHelper = new BucketHelper(bucket);\r\n\r\n(string key, Film film) fightClub = bucketHelper.GetTuple<Film>(\"film-001\");<\/code><\/pre>\n<\/div>\n<\/div>\n
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La tupla constar\u00e1 de una cadena (la clave del documento) y un objeto del tipo que especifiques. El contenido del documento es JSON y ser\u00e1 serializado a un objeto C# por el SDK .NET.<\/p>\n<\/div>\n
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Adem\u00e1s, f\u00edjate en que el nombre de las propiedades de las tuplas no tiene por qu\u00e9 coincidir. Yo he utilizado obj<\/code> en BucketHelper<\/code> pero utilic\u00e9 pel\u00edcula<\/code> cuando llam\u00e9 GetTuple<\/code>. Los tipos tienen que coincidir, por supuesto.<\/p>\n<\/div>\n<\/div>\n
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Tuple como tipo de par\u00e1metro<\/h3>\n
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Tambi\u00e9n puedo hacer lo contrario y pasar una tupla como par\u00e1metro a InsertTuple<\/code>.<\/p>\n<\/div>\n
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string key = Guid.NewGuid().ToString();\r\nFilm randomFilm = GenerateRandomFilm();\r\nbucketHelper.InsertTuple((key, randomFilm));<\/code><\/pre>\n<\/div>\n<\/div>\n
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En GenerarPel\u00edculaAleatoria<\/code> devuelve un Pel\u00edcula<\/code> con algunos valores aleatorios (echa un vistazo al objeto Fuente GitHub<\/a> para m\u00e1s detalles). Una tupla de (cadena, Pel\u00edcula)<\/code> se pasa a InsertTuple<\/code>. El SDK de Couchbase .NET lo toma de ah\u00ed e inserta un documento con la clave\/valor apropiado.<\/p>\n<\/div>\n
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Ejecutando la aplicaci\u00f3n de consola, deber\u00edas obtener una salida parecida a esta:<\/p>\n<\/div>\n
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\"C#<\/span><\/p>\n<\/div>\n
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Ten en cuenta que el SDK .NET de Couchbase en este momento no tiene soporte directo para tuplas, y puede que nunca lo necesite. Este c\u00f3digo es simplemente para ayudar a demostrar tuplas C#. No recomiendo usar el BucketHelper tal cual en producci\u00f3n.<\/em><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\u00bfTUH-ple o TOO-ple?<\/h2>\n
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Creo recordar que mis profesores lo pronunciaban como \"TOO-ple\", as\u00ed que eso es lo que yo uso. Al igual que el debate sobre la \"G\" dura o la \"G\" suave, estoy seguro de que hay quienes piensan que este debate es de suma importancia y est\u00e1n convencidos de que su pronunciaci\u00f3n es la \u00fanica verdadera. Pero.., ambos son aceptables<\/a>.<\/p>\n<\/div>\n
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Si tienes preguntas sobre las tuplas, estar\u00e9 encantado de ayudarte. Tambi\u00e9n puedes ponerte en contacto conmigo en Twitter @mgroves<\/a> o env\u00edeme un correo electr\u00f3nico matthew.groves@couchbase.com<\/a>.<\/p>\n<\/div>\n
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Si tienes alguna pregunta sobre el SDK .NET de Couchbase que he utilizado en este post, no dudes en preguntar en la secci\u00f3n Foros de Couchbase .NET<\/a>. Consulte tambi\u00e9n el Portal para desarrolladores de Couchbase<\/a> para obtener m\u00e1s informaci\u00f3n sobre el SDK .NET y Couchbase en general.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"
C# tuples are a new feature of C# 7. I\u2019m going to show you the basics of how C# tuples work. I\u2019m also going to mix in a little Couchbase to show tuples in action. However, if you don\u2019t want […]<\/p>","protected":false},"author":71,"featured_media":3176,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1811,10127,1816],"tags":[],"ppma_author":[8937],"class_list":["post-3175","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dotnet","category-c-sharp","category-couchbase-server"],"acf":[],"yoast_head":"\nC# Tuples Language Feature | Basics of How C# Tuples Work<\/title>\n<meta name=\"description\" content=\"C# tuples are a new feature of C# 7. 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