Skip to main content


Daca avem doua liste si este nevoie sa facem merge la elemente doua cate doua in ordinea pozitiei din lista este nevoie sa scriem un cod asemanator cu acesta:
var numeList = new[] { "Ioan", "Gheorghe", "Mihai", "Laurentiu" };
var prenumeList = new[] { "Pop", "Rus", "Ratiu", "Negru" };
var numePrenumeList = new List<string>();
for(int i = 0; i < numeList.Count(); i++)
numePrenumeList.Add(numeList[i] + " " + prenumeList[i]);

Rezultatul ar fi:
Ioan Pop
Gheorghe Rus
Mihai Ratiu
Laurentiu Negru
Acelasi lucru putem sa il facem daca folosim metoda Enumerable.Zip. Prin intermediul acestei metode putem sa facem merge intre doi vectori element cu element:
var numePrenumeList = numeList.Zip(
(nume, prenume) => nume + " " + prenume);
Nu o sa avem nevoie de acesta metoda in fiecare zi, dar mi s-a parut o metoda pe care merita sa o cunoastem.
In cazul in care lungimea la cei doi vectori nu este aceiași, o sa se faca merge doar pana la MIN(lista1.Count,lista2.Count). Desi parca ar fi mai normal sa arunce exceptie.


Popular posts from this blog

ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded

Today blog post will be started with the following error when running DB tests on the CI machine:
threw exception: System.InvalidOperationException: The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer' registered in the application config file for the ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded. Make sure that the assembly-qualified name is used and that the assembly is available to the running application. See for more information. at System.Data.Entity.Infrastructure.DependencyResolution.ProviderServicesFactory.GetInstance(String providerTypeName, String providerInvariantName) This error happened only on the Continuous Integration machine. On the devs machines, everything has fine. The classic problem – on my machine it’s working. The CI has the following configuration:

TeamCity.NET 4.51EF 6.0.2VS2013
It seems that there …

Entity Framework (EF) TransactionScope vs Database.BeginTransaction

In today blog post we will talk a little about a new feature that is available on EF6+ related to Transactions.
Until now, when we had to use transaction we used ‘TransactionScope’. It works great and I would say that is something that is now in our blood.
using (var scope = new TransactionScope(TransactionScopeOption.Required)) { using (SqlConnection conn = new SqlConnection("...")) { conn.Open(); SqlCommand sqlCommand = new SqlCommand(); sqlCommand.Connection = conn; sqlCommand.CommandText = ... sqlCommand.ExecuteNonQuery(); ... } scope.Complete(); } Starting with EF6.0 we have a new way to work with transactions. The new approach is based on Database.BeginTransaction(), Database.Rollback(), Database.Commit(). Yes, no more TransactionScope.
In the followi…

GET call of REST API that contains '/'-slash character in the value of a parameter

Let’s assume that we have the following scenario: I have a public HTTP endpoint and I need to post some content using GET command. One of the parameters contains special characters like “\” and “/”. If the endpoint is an ApiController than you may have problems if you encode the parameter using the http encoder.
using (var httpClient = new HttpClient()) { httpClient.BaseAddress = baseUrl; Task<HttpResponseMessage> response = httpClient.GetAsync(string.Format("api/foo/{0}", "qwert/qwerqwer"))); response.Wait(); response.Result.EnsureSuccessStatusCode(); } One possible solution would be to encode the query parameter using UrlTokenEncode method of HttpServerUtility class and GetBytes method ofUTF8. In this way you would get the array of bytes of the parameter and encode them as a url token.
The following code show to you how you could write the encode and decode methods.