C# Generic Interface and Factory Pattern

I am trying to create a Generic interface where the parameter type of one of the methods is defined by the generic I've changed the question slightly after realising I have probably confused matter...

8 Sep at 10:36

Selecting List<string> into Dictionary with index

I have a List ``` List<string> sList = new List<string>() { "a","b","c"}; ``` And currently I am selecting this into a dictionary the following structure: ``` //(1,a)(2,b)(3,c) Dictionary<int, str...

8 Sep at 08:36

Extension gd is missing from your system - laravel composer Update

I newly install Dompdf in Laravel Project via Composer (`composer require barryvdh/laravel-dompdf`). After enter the Command Terminal Reply Following Errors. ``` Problem 1 - dompdf/dompdf v0.7.0 ...

8 Sep at 07:49

Adding a button to the title bar Xamarin Forms

Haven't been able to find quite the right answer for this yet. I want to add a button into the navigation / title bar at the top of a Xamarin Forms Navigation Page. Note that I need to know a method t...

Show distinct column values in pyspark dataframe

With pyspark dataframe, how do you do the equivalent of Pandas `df['col'].unique()`. I want to list out all the unique values in a pyspark dataframe column. Not the SQL type way (registertemplate then...

Can't make Jackson and Lombok work together

I am experimenting in combining Jackson and Lombok. Those are my classes: ``` package testelombok; import com.fasterxml.jackson.annotation.JsonCreator; import com.fasterxml.jackson.annotation.JsonPr...

8 Sep at 02:9

How to get content value in Xunit when result returned in IActionResult type

I have a unit test project using Xunit and the method we are testing returns `IActionResult`. I saw some people suggest using "NegotiatedContentResult" to get the content of the `IActionResult` but ...

DataTables: Cannot read property style of undefined

I am getting this error with the following: ``` jquery.dataTables.js:4089 Uncaught TypeError: Cannot read property 'style' of undefined(…) _fnCalculateColumnWidths @ jquery.dataTables.js:4089 _fnInit...

7 Sep at 18:22

Resolving interface with generic type in ServiceStack Request filter

My question is - is it possible and if it is - how, to resolve interface in ServiceStack request filter that uses generic type and the type is retrieved dynamically from of request. The idea is that ...

I get "The type initializer for 'Microsoft.Cct.CctProjectNode' threw an exception." when opening ccproj files after installing Azure SDK 2.9

I have a solution with an Azure cloud project in it that's targeting the 2.7 version of the Microsoft Azure SDK which I could open/build and deploy without problems. Since Visual Studio was nagging me...

15 Sep at 09:50

How to install Anaconda on RaspBerry Pi 3 Model B

I would like to know how to install the latest Anaconda version from Continuum on my Raspberry Pi 3 model B. Any help would be appreciated...

7 Sep at 13:50

@ViewChild in *ngIf

## Question What is the most elegant way to get `@ViewChild` after corresponding element in template was shown? Below is an example. Also [Plunker](http://plnkr.co/edit/xAhnVVGckjTHLHXva6wp?p=previ...

NUnit: How to pass TestCaseData from a non-static method?

My test fails because of the message: ``` The sourceName specified on a TestCaseSourceAttribute must refer to a static field, property or method. ``` This is my Code: ``` const double MAX_DELTA = 0.0...

13 Jul at 06:51

Exception: The XPath expression evaluated to unexpected type System.Xml.Linq.XAttribute

I've an XML file like below: ``` <Employees> <Employee Id="ABC001"> <Name>Prasad 1</Name> <Mobile>9986730630</Mobile> <Address Type="Perminant"> <City>City1</City> <Country>...

20 Sep at 06:4

Entity Framework + sql injection

I'm building up an `IQueryable` where I am applying relevant filters, and I come across this line of code here. ``` items = items.OrderBy(string.Format("{0} {1}", sortBy, sortDirection)); ``` Is th...

Getting the count of records in a data frame quickly

I have a dataframe with as many as 10 million records. How can I get a count quickly? `df.count` is taking a very long time.

6 Sep at 21:14

How to add a custom CA Root certificate to the CA Store used by pip in Windows?

I just installed Python3 from python.org and am having trouble installing packages with `pip`. By design, there is a man-in-the-middle packet inspection appliance on the network here that inspects al...

14 Feb at 10:21

Set up JWT Bearer Token Authorization/Authentication in Hangfire

How can you configure Bearer Token Authorization/Authentication in Hangfire? I have a custom authentication filter that read the Authentication Token on the initial request but all other requests ([H...

Entity-Framework auto update

i try to implement Entity-Framework into my project! My Project is plugin-based so i do not know which object i have to save to database. I have implemented it so: ``` public class DatabaseContext ...

6 Sep at 12:45

Java equivalent of C# Delegates (queues methods of various classes to be executed)

TLDR: Is there a Java equivalent of C#'s [delegates](http://www.tutorialsteacher.com/csharp/csharp-delegates) that will allow me to queue up methods of various classes and add them to the queue dynam...

7 Aug at 12:12

The type 'Newtonsoft.Json.JsonConvert' exists in both 'Newtonsoft.Json.dll' and 'NuGetApi2.dll'

I am trying to serialize object on the fly into immediate window by using ``` Newtonsoft.Json.JsonConvert.SerializeObject(myObj); ``` However I am getting following error > The type 'Newtonsoft.J...

26 Sep at 09:26

ServiceStack Free-quota

I'm a bit confused about ServiceStack's free-quota statement on [https://www.servicestack.net/download#free-quotas](https://www.servicestack.net/download#free-quotas) If I read it correctly you're al...

6 Sep at 08:59

Intercept/handle browser's back button in React-router?

I'm using Material-ui's Tabs, which are controlled and I'm using them for (React-router) Links like this: ``` <Tab value={0} label="dashboard" containerElement={<Link to="/dashboard/home"/>}/> <T...

asp.net display image from byte array

I have a byte array and trying to display image from that. ``` using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Web; using System.Web.UI; using System....

5 Sep at 22:28

DocumentClient CreateDocumentQuery async

Why is there no async version of `CreateDocumentQuery`? This method for example could have been async: ``` using (var client = new DocumentClient(new Uri(endpointUrl), authorizationKey, _connectionPol...

11 Nov at 03:46