linq extension methods

NHibernate LINQ Query Extension Enhancements (Nineth article)　　In the previous introduction of LINQ to NHibernate, all of the IqueryoverIn fact, LINQ to NHibernate is more powerful. let's first introduce the namespace Nhibernate.linq, which has a more powerful extension of

C #4.0 new features (4) New LINQ Extension Method-zip () 1. Introduction The so-called zip (Chinese indicates a zipper) is to stitch two lists together like a zipper. There is a zip function in Python that can be used to conveniently merge two or more sets, for example: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->>>> Firstname = ['freesc ', 'jobua', 'ken

varParameterreplacer =NewParameterreplacer (candidateexpr); the + varleft =Parameterreplacer.replace (expleft.body); - varright =Parameterreplacer.replace (expright.body); the varBODY =expression.or (left, right);Bayi the returnExpression.lambdaBOOL>>(body, candidateexpr); the } - } - /// the ///queryable Extension the /// the Public Static classqueryableexte

First define an array, int[] a = {3,1,2,4}, we want to simply implement the ordering of the array, but the a array is under system space, there is no order by (), this is the introduction of namespaces using You can see the method again after System.Linq. Here's a simple example:Using System;using System.linq;namespace object initializer {class program { static void Main (string[] args) { int[] A = {3,1,2,4}; var result = A.orderby (t=>t); foreac

I created a new LINQ to SQL classes item named etc. dbml. Etcdatacontext is generated by default. The system returns a null value when executing etcdatacontext. submitchanges (), so that the user cannot know whether the execution result is successful or failed. Therefore, we decided to use the extension method to expand etcdatacontext. CodeAs shown in the following code:DataaccesscomponentClass, which i

This article was reproduced from: http://blog.csdn.net/zxz414644665/article/details/9793205When you have a requirement like this, the extension will work: In the project, Class A needs to add functionality, and we think of adding a public method to Class A, which is obviously possible, but for some reason you can't modify the code of Class A itself, but it does need to add functionality to Class A, What to do? This time the

Link to the original English text: Http://weblogs.asp.net/scottgu/archive/2007/03/13/new-orcas-language-feature-extension-methods.aspx What is the extension method ): The extension method allows developers to add new methods to an existing CLR type public contract (contract) without generating subclass or re-compiling

This morning I saw this article at the MSDN site: The Evolution of C # 3.0 LINQ and its impact on C # design. From this article we can see clearly that the new features that are added to C # 3.0 can be considered for the development of LINQ, some of the new features that are created for LINQ, and of course those features that can be used by non-

(string. isnullorempty (s) continue; String [] pair = S. Split (New char [] {':'}); If (pair. length! = 2) continue; Plist. Add (New keyvaluepair } Return plist; } Public static string matchandreplace (this string SRC, string pattern, string DST) { List Foreach (Match m in RegEx. Matches (SRC, pattern )) { MList. Add (M. value ); } Foreach (string s in MList) { If (string. isnullorempty (s) continue; Src = SRC. Replace (S, DST ); } Return SRC; } } Use Cases of the preceding two

combination scenarios that are specific to a domain (domain specific). built-in System.Linq extension method A built-in extension method library that is published with. NET during the Orcas period is a very powerful query extension method that allows developers to query any data. These extension method implementations

The First and FirstOrDefault methods of LINQ and the Last and LastOrDefault methods ., Linqfirstordefault The First and FirstOrDefault methods are the First elements in the returned set. The difference is that if there is no result, the former (First) throws an exception, and the latter (FirstOrDefault) returns the de

Determine the php file extension and obtain the file extension in N ways ,. Php file extension determination and obtaining of file extension N methods, the following code is php file extension judgment! DOCTYPEhtmlheadmetahttp-equ

The last time we analyzed the implementation of the Array.sort Unfortunately, LINQ-sorted code in the System.Core.dll assembly, Microsoft did not release this part of the source code, we have to use the. NET reflector to find out. Definition, use, and extension of LINQ sort interfaces The so-called LINQ ordering is

This article mainly introduces the PHP file extension judgment and the N methods for getting the file extension through the Code. If you need a friend, follow the script editor to learn it. This article mainly introduces the PHP file extension judgment and the N methods for

These days idle is also idle, on the careful study of LINQ syntax, and some of his extension methods of use.The following are some common extension methods. Aggregate Custom Aggregation Calculations All Detects whether all elements in a

This article describes how to determine the php file extension and how to obtain the file extension through code. if you need to learn how to use the php file extension, follow the php file extension editor. the following code is used to determine the php file extension.

This article describes how to determine the PHP file extension and how to obtain the file extension through code. If you need to learn how to use the PHP file extension, follow the script editor. The following code is used to determine the PHP file extension. Check fileFile E