aiohttp.ClientSession may be used as a parent for a custom WebSocket class.
Python 3.x3.5
import asyncio
from aiohttp import ClientSession
class EchoWebSocket(ClientSession):
URL = "wss://echo.websocket.org"
def __init__(self):
super().__init__()
self....
There have been many releases of Java since the original Java 1.0 release in 1995. (Refer to Java version history for a summary.) However most releases have passed their official End Of Life dates. This means that the vendor (typically Oracle now) has ceased new development for the release, and n...
Firstly you have to add Xamarin.Android.Support.V7.AppCompat library for NuGet:
https://www.nuget.org/packages/Xamarin.Android.Support.v7.AppCompat/
In the "values" folder under "Resources" add new xml file called "styles.xml":
"styles.xml" file should co...
Things you need
A paid Apple Developer Program Membership
A valid App ID and identifier for you app (like com.example.MyApp) which is not used before anywhere
Access to developer.apple.com and Member Center
An iOS Device to test (as Push Notifications don't work on Simulator)
Enabling t...
An extremely simple tool for installing PostgreSQL on a Mac is available by downloading Postgres.app. You can change preferences to have PostgreSQL run in the background or only when the application is running.
This is a basic in-app keyboard. The same method could be used to make just about any keyboard layout. Here are the main things that need to be done:
Create the keyboard layout in an .xib file, whose owner is a Swift or Objective-C class that is a UIView subclass.
Tell the UITextField to use t...
During mousemove you get flooded with 30 mouse events per second. You might not be able to redraw your drawings at 30 times per second. Even if you can, you're probably wasting computing power by drawing when the browser is not ready to draw (wasted == across display refresh cycles).
Therefore it m...
.default-settings() {
padding: 4px;
margin: 4px;
font-size: 16px;
border: 1px solid gray;
}
#demo {
.default-settings;
}
The above example when compiled would only produce the following output. The .default-settings() mixin definition would not be output in the compiled CSS fi...
Apps Script:
//Triggered when the page is navigated to, serves up HTML
function doGet(){
var template = HtmlService.createTemplateFromFile('index');
return template.evaluate()
.setTitle('Example App')
.setSandboxMode(HtmlService.SandboxMode.IFRAME);
}
//Called from the cli...
my_array = array('i', [1,2,3,4,5])
my_array.append(6)
# array('i', [1, 2, 3, 4, 5, 6])
Note that the value 6 was appended to the existing array values.
You are able to append a string to a character array using fromstring()
my_char_array = array('c', ['g','e','e','k'])
my_char_array.fromstring("stuff")
print(my_char_array)
#array('c', 'geekstuff')
Every Windows Phone project contains App.cs class:
public sealed partial class App : Application
This class is your global application context.
General Application class usage:
App entry point, particularly for various activation contracts.
Application lifecycle management.
Application g...
The first time a user runs a project's gradlew, it should be realized that it will do two key things:
Check to see if the version of the gradle used by the wrapper is already in ~/.gradle/wrapper/dists
If not, download the archive of the version from the internet
If you're in an environment t...
This is a relatively common mistake: You created an rect element, in a bar chart for instance, and you want to add a text label (let's say, the value of that bar). So, using the same variable that you used to append the rect and define its x and y position, you append your text element. Very logic, ...
Resolving scoped services during application startup can be difficult, because there is no request and hence no scoped service.
Resolving a scoped service during application startup via app.ApplicationServices.GetService<AppDbContext>() can cause issues, because it will be created in the sc...
What you need is to get an entitlements file so the app can access your iCloud and write records using CloudKit.
Follow the steps to grant access to iCloud from your app:
1- Select the project in the Project Navigator, and then open the General tab.
2- In the Identity section, set your developer ...
A few pre-requisites in the build.gradle for vectors to work all the way down to API 7 for VectorDrawables and API 13 for AnimatedVectorDrawables (with some caveats currently):
//Build Tools has to be 24+
buildToolsVersion '24.0.0'
defaultConfig {
vectorDrawables.useSupportLibrary = true
...
xcrun uses the system default Xcode version (set via xcode-select) to locate and execute command line tools from the Xcode application bundle, e.g., llvm-cov.
# Generate code coverage reports via llvm-cov
# /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
xc...
JSON_MODIFY function can be used to append new value to some array inside JSON:
update Product
set Data = JSON_MODIFY(Data, 'append $.tags', "sales")
where ProductID = 17;
New value will be appended at the end of the array, or a new array with value ["sales"] will be create...
