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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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How to change the order of DataFrame columns?
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incase you get "cannot concatenate 'str' and 'list' objects" make sure you [] the str value in cols: cols = [cols[7]] + cols[:7] + cols[8:]
– moeabdol
Jan 9 '15 at 16:59
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Properties vs Methods
Quick question: When do you decide to use properties (in C#) and when do you decide to use methods?
16 Answers
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Easiest way to toggle 2 classes in jQuery
If I have class .A and class .B and want to switch in between on button click, what's a nice solution for that in jQuery? I still don't understand how toggleClass() works.
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PHP DOMDocument loadHTML not encoding UTF-8 correctly
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Still in 2017 this answer is relevant and worked for me too. I had my database, multibyte, html meta tag and DOM encoding all set to utf8 and still had bad encoding on importing node from one DOC to another. php.net/manual/en/function.mb-convert-encoding.php was ...
Android: Scale a Drawable or background image?
... like this:
<?xml version="1.0" encoding="utf-8"?>
<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
android:gravity="center"
android:src="@drawable/list_bkgnd" />
Then it will be centered in the view if used as background. There are also other flags: http://d...
IE9 border-radius and background gradient bleeding
IE9 is apparently able to handle rounded corners by using the CSS3 standard definition of border-radius .
17 Answers
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Why is “copy and paste” of code dangerous? [closed]
...a bug in your copy-paste code, you will need to fix it every place you did and hope you can remember them all (this also holds for changed requirements).
If you keep logic in one place, it is easier to change when needed (so if you decide that the application needs updating, you only do it in one p...
Why do I need to do `--set-upstream` all the time?
...t branch. Or, to push to the current branch to a branch of the same name (handy for an alias):
git push -u origin HEAD
You only need to use -u once, and that sets up the association between your branch and the one at origin in the same way as git branch --set-upstream does.
Personally, I think i...
Getting the name of a child class in the parent class (static context)
I'm building an ORM library with reuse and simplicity in mind; everything goes fine except that I got stuck by a stupid inheritance limitation. Please consider the code below:
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