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Socket.IO - how do I get a list of connected sockets/clients?
...ion ONLY works with version prior to 1.0
UPDATED 2020 Mar 06
From 1.x and above, please refer to this link: getting how many people are in a chat room in socket.io
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Overflow Scroll css is not working in the div
...ay overflow content of a block-level element, when it overflows at the top and bottom edges.
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Adding Permissions in AndroidManifest.xml in Android Studio?
In Eclipse we were able to add permissions in AndroidManifest.xml by going to AndroidManifest.xml->Permission-> Adding permissions.
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How do I use installed packages in PyCharm?
...oject Settings → Project Interpreter.
Then press configure interpreter, and navigate to the "Paths" tab.
Press the + button in the Paths area. You can put the path to the module you'd like it to recognize.
But I don't know the path..
Open the python interpreter where you can import the mod...
Do I really have a car in my garage? [duplicate]
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If you need to make the difference between Car and Boat in your garage, then you should store them in distinct structures.
For instance:
public class Garage {
private List<Car> cars;
private List<Boat> boats;
}
Then you can define methods that are ...
differences in application/json and application/x-www-form-urlencoded
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@buffer My understanding is using JSON as contentType helps when the data to be sent is more complex and involves a lot of hierarchy.. whereas form encoded is good to send simple params in url which can be read at the backend without to much c...
Get querystring from URL using jQuery [duplicate]
... Object containing the URL parameters:
// Read a page's GET URL variables and return them as an associative array.
function getUrlVars()
{
var vars = [], hash;
var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
for(var i = 0; i < hashes.len...
App Inventor 2 中的响应式设计 · App Inventor 2 中文网
...iled example
Special circumstances
Limitation: Drawing and animation
Responsive design and Google Play
One tricky issue in designing apps is making apps that look good on devices with screens of differing sizes. For example, apps designed for a given phone should ...
HTML img scaling
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Only set the width or height, and it will scale the other automatically. And yes you can use a percentage.
The first part can be done, but requires JavaScript, so might not work for all users.
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How to create empty text file from a batch file?
Can somebody remember what was the command to create an empty file in MSDOS using BAT file?
13 Answers
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