Is there a difference between lambdas declared with and without async
Is there a difference between lambdas `() => DoSomethingAsync()` and `async () => await DoSomethingAsync()` when both are typed as `Func<Task>`? Which one should we prefer and when? Here is a simple ...
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- 10 May at 08:56
installing cPickle with python 3.5
This might be silly but I am unable to install `cPickle` with python 3.5 docker image ``` FROM python:3.5-onbuild ``` ``` cpickle ``` When I try to build the image ``` $ docker build -t samp...
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- 10 May at 08:20
Authentication for ServiceStack JavaScript Server Events Client
I am trying to setup servicestack with ServerEvents. I have added the plugin for ServerEventsFeature. I am using the [Javascript server events client](https://github.com/ServiceStack/ServiceStack/wiki...
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- 11 May at 12:27
Add JAR files to a Spark job - spark-submit
True... it has been discussed quite a lot. However, there is a lot of ambiguity and some of the answers provided ... including duplicating JAR references in the jars/executor/driver configuration or o...
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- 27 Jan at 19:32
IServiceCollection not found in web API with MVC 6
I am working with web API with MVC 6, here I am going in order to inject the repository into the controller, we need to register it with the DI container. Open the Startup.cs file. In the `ConfigureS...
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- 12 May at 10:18
how to make the blur effect with react-native?
[](https://i.stack.imgur.com/Sugxo.jpg) how to make the blur effect with react-native ? like 'background-image' and i want to switch the effect 'blur' and 'none'，'none' means no blur effect
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- 10 May at 07:56
HtmlAgilityPack - How to get the tag by Id?
I have a task to do. I need to retrieve the a `tag` or `href` of a specific `id` (the `id` is based from the user input). Example I have a `html` like this ``` <manifest> <item href="Text/Cover.xht...
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- 10 May at 06:25
ServiceStack serialisation of long int value
I have an object with an attribute defined as long and the exact value is `635980054734850470` but when it gets serialised the JSON output gives me `635980054734850400` It seems to be consistently dr...
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- 10 May at 08:14
API request WaitingForActivation "Not yet computed" error
I'm using the Poloniex C# API code from: [https://github.com/Jojatekok/PoloniexApi.Net](https://github.com/Jojatekok/PoloniexApi.Net) On my console application the request to get balances is working,...
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- 10 May at 21:53
Subscribing to observable sequence with async function
I have an `asnyc` function that I want to invoke on every observation in an `IObservable` sequence, limiting delivery to one event at a time. The consumer expects no more than one message in flight; ...
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- 10 May at 04:15
How can I improve ServiceStack Server Events Efficiency
I was looking at replacing our periodic polling web page with ServiceStack server events, but in looking at the behavior, the server events mechanism is actually way more overhead than what we were do...
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- 9 May at 22:58
Bot Framework: How to exit Conversation?
so right now I'm using `Microsoft.Bot.Builder.Dialogs.Conversation.SendAsync` and `Microsoft.Bot.Builder.Dialogs.Conversation.ResumeAsync` to implement a way to pause and resume conversation but it se...
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- 9 May at 21:42
Pip "Could not find a version that satisfies the requirement pygame"
When I try to install PyGame with:`pip install pygame` it says > Collecting pygameCould not find a version that satisfies the requirement pygame (from versions: ) No matching distribution found I beli...
Nothing happens when I try to send files / folders to Compressed (zipped) folder
For a while now, I've been unable to send files or folders to Zipped folder from windows explorer. The option is there, but when I click on it, nothing happens. It seems others have had similar probl...
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- 3 Aug at 06:11
How do I replace a custom AppSetting class with a MultiAppSetting class in ServiceStack?
We have decided to use the new DynamoDbAppSettings class in our application to take advantage of DynamoDb. We are currently using a custom class that inherits from AppSettings (part of the class show...
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- 9 May at 17:31
How to pass credentials to a SOAP webservice?
I am trying to call a SOAP webservice, however I am getting the error: Additional information: The username is not provided. Specify username in ClientCredentials. So I thought I could just set clien...
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- 9 May at 16:33
Why does a local var reference cause a large performance degradation?
Consider the following simple program: ``` using System; using System.Diagnostics; class Program { private static void Main(string[] args) { const int size = 10000000; var array = ...
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- 9 May at 16:34
Slashes in a query string parameter?
How can I send a file path as a query string parameter? This is my string parameter: > //domain/documents/Pdf/1234.pdf I have tried that: ``` [HttpPost] [Route("documents/print/{filePath*}")] ...
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- 9 May at 15:37
Job for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xe" for details
This is due to non-existance of "/var/www/html" directory. run mkdir "/var/www/html" , hope it will solved. I have installed a fresh copy of Centos 7. Then I restarted Apache but the Apache failed to ...
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- 1 Nov at 16:6
UWP Check If File Exists
I am currently working on a Windows 10 UWP App. The App needs to Check if a certain PDF File exists called "01-introduction", and if so open it. I already have the code for if the file does not exis...
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- 24 Aug at 08:41
Hashing an array in c#
How to implement `GetHashCode` for an `Array`. I have an object that overrides `Equals`, checking that: ``` this.array[n] == otherObject.array[n] ``` for all `n` in `array`. Naturally I shoul...
Where does Anaconda Python install on Windows?
I installed Anaconda for Python 2.7 on my Windows machine and wanted to add the Anaconda interpreter to PyDev, but quick googling couldn't find the default place where Anaconda installed, and searchin...
Angular 2 setinterval() keep running on other component
I have the following method in one component: ``` ngOnInit() { this.battleInit(); setInterval(() => { this.battleInit(); }, 5000); ...
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- 9 May at 13:6
C# 6 how to format double using interpolated string?
I have used interpolated strings for messages containing `string` variables like `$"{EmployeeName}, {Department}"`. Now I want to use an interpolated string for showing a formatted `double`. Example `...
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- 18 Dec at 03:51
CSS3 100vh not constant in mobile browser
I have a very odd issue... in every browser and mobile version I encountered this behavior: - - - - How can avoid this problem? When I first heard of viewport-height I was excited and I thought I c...
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- 25 Mar at 01:28