Null coalescing operator IList, Array, Enumerable.Empty in foreach
In [this question](https://stackoverflow.com/questions/3088147/why-does-net-foreach-loop-throw-nullrefexception-when-collection-is-null) I found the following: ``` int[] array = null; foreach (int i...
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- 18 Sep at 11:14
ASP NET Core JWT authentication allows expired tokens
For some reason my RESTful app allows requests from Angular client with expired token for some time. Generating token: ``` private async Task<string> GenerateJwtToken(ApplicationUser user) { var ...
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- 18 Sep at 06:1
WPF TreeView with virtualization - select and bring item into view
I've been working with WPF treeview for a bit recently and I'm having a really awful time trying to get the selected item to show up on the screen when the user uses a search function that sets the Is...
how to resolve "Unable to find package" nuget error
Working on creating a nuget pkg for a project (A.csproj) which depends on another project (B.csprojec) added as a project reference. Here is the .nuspec , ``` <?xml version="1.0"?> <package > <met...
Angular 6 add input on enter key
I have component called `text-editor.component` and this is my html template: ``` <div class="container"> <div id="testo" class="offset-1 text-center" > <input type="text" class="col-8 text-center...
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- 6 Jan at 12:5
Get the center point between many GameObjects in Unity
I have created a game in which you can control X characters at the same time in the same form and they can die at any time. My problem is when I want the game camera to include all these gameobjects. ...
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- 6 May at 06:7
Jenkins pipeline how to change to another folder
Currently i am using Jenkins pipeline script. For running one command, I need to access a folder outside its workspace directory. I tried `sh "cd $workspace/"`, but it returned current workspace fo...
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- 17 Sep at 17:1
Check value in array exists Flutter dart
I am trying to check condition ``` if (value in List) { exist } else { not exist } ``` but nothing to help anyone having an idea then please share. ``` My List = _quantityController[]; ``` ...
Namespace "stuck" as Terminating, How I removed it
I had a "stuck" namespace that I deleted showing in this eternal "terminating" status.
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- 27 Jul at 15:22
ServiceStack: Authenticate each request using headers in the HTTP request
I have have read [other posts](https://stackoverflow.com/questions/15804582/servicestack-authentication-process-on-each-request) on the same topic, but I haven't really gotten a clear picture of how t...
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- 28 Sep at 07:16
Invariant Violation: Text strings must be rendered within a <Text> component
I've upgraded from RN 0.54 to 0.57 and my app has pretty much fallen over due to using React Native Elements. I took use of their error functionality on `TextInput` components which basically enabled...
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- 17 Sep at 12:58
How to change label text in xamarin
I am relatively new to Xamarin forms. I have found out I am unable to change label text from the code behind. Normally I would do `myLabel.text = variable`. Does this work in Xamarin? If it does why d...
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- 17 Sep at 11:6
Entity Framework Core 2.1 - Multiple Providers
What is the right way to work with multiple providers? My Example: ``` { "ConnectionStrings": { "Sqlite": "Data Source=database.db" } } ``` ``` public void ConfigureServices(IServiceCol...
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- 18 Sep at 16:18
PHP with MySQL 8.0+ error: The server requested authentication method unknown to the client
I'm running MySQL version 8 on PHP 7.0. I'm getting the following error when I try to connect to my database from PHP: > Connect Error: SQLSTATE[HY000] [2054] The server requested authentication met...
In-line TryGetValue in If conditon and evaluate it's Value
Is there any way how to write `TryGetValue` on one line in If condition. Normal way of calling `TryGetValue` would be: What I am looking for would be something like this. I know that line wouldn't wor...
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- 7 May at 05:47
How to return 404 on wrong API url? (ASP.NET Core + SPA)
I need to return 404 on wrong api call so I can create proper response to user on client side (Angular 5). Currently backend returns status code 200 and index.html, and that results in json parse erro...
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- 16 Sep at 21:24
AttributeError: 'Tensor' object has no attribute 'numpy'
How can I fix this error I downloaded this code from GitHub. ``` predicted_id = tf.multinomial(tf.exp(predictions), num_samples=1)[0][0].numpy() ``` throws the error ``` AttributeError: 'Tensor' ...
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- 7 Oct at 11:39
Difference between a List's Add and Append method?
Is there a difference between the `.Append()` and the `.Add()` method for lists in C#? I tried searching in Google and in the site but to my surprise no one asked it. My reason for asking is to know i...
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- 4 Apr at 00:24
Pass current transaction to DbCommand
I'm working on a project using ASP.NET Core 2.1 and EF Core 2.1. Although most of queries and commands use EF, some units needs to call stored procedures directly. I can't use `FromSql`, because it ne...
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- 24 Apr at 09:47
Why is IL.Emit method adding additional nop instructions?
I have this code that emits some `IL` instructions that calls `string.IndexOf` on a `null` object: ``` MethodBuilder methodBuilder = typeBuilder.DefineMethod( ...
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- 16 Sep at 00:41
How do I use Windows Authentication with the Flurl library?
[Flurl](https://flurl.io/docs/fluent-http/) has methods for doing OAuth and Basic authentication: ``` await url.WithBasicAuth("username", "password").GetJsonAsync(); await url.WithOAuthBearerToken("m...
App.config add nested group to existing node
I have to save 2 different groups of settings in my root settings group. It should looks like this: ``` <?xml version="1.0" encoding="utf-8"?> <configuration> <configSections> <sectionGroup...
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- 24 Sep at 07:11
Center content vertically on Vuetify
Is there a way to center content vertically in Vuetify? With the `text-xs-center` helper class, the content gets centered horizontally only: ``` <v-container grid-list-md text-xs-center> <v-layout...
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- 18 May at 18:40
ServiceStack: Routes.AddFromAssembly still uses /json/reply path and no URL-niceness for properties
I have a ServiceStack self-hosted webservice, using the `AppSelfHostBase`. WHen the Configure method is executed, I have this: ``` public override void Configure(Container container) { Config.Ro...
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- 25 Jun at 21:4
C# - how to do multiple web requests at the same time
I wrote a code to check urls, however, ir works really slow.. I want to try to make it work on few urls at the same time, for example 10 urls or at least make it as fast as possible. my Code: ``` Pa...