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How to use redis PUBLISH/SUBSCRIBE with nodejs to notify clients when data values change?
...st-install
curl http://nodejs.org/dist/node-latest.tar.gz | tar xz --strip-components=1
./configure --prefix=~/local
make install # ok, fine, this step probably takes more than 30 seconds...
curl http://npmjs.org/install.sh | sh
Install dependencies
After you installed node+npm you should install...
How can I implement a tree in Python?
...
anytree
I recommend https://pypi.python.org/pypi/anytree (I am the author)
Example
from anytree import Node, RenderTree
udo = Node("Udo")
marc = Node("Marc", parent=udo)
lian = Node("Lian", parent=marc)
dan = Node("Dan", parent=udo)
jet...
How can I scroll a web page using selenium webdriver in python?
...e
time.sleep(SCROLL_PAUSE_TIME)
# Calculate new scroll height and compare with last scroll height
new_height = driver.execute_script("return document.body.scrollHeight")
if new_height == last_height:
break
last_height = new_height
another method (thanks to Juanse) is, ...
Generate a random point within a circle (uniformly)
...a distance x+y from the origin. If x+y>R we fold back down.
Here's the complete algorithm for R=1. I hope you agree it's pretty simple. It uses trig, but you can give a guarantee on how long it'll take, and how many random() calls it needs, unlike rejection sampling.
t = 2*pi*random()
u = rando...
What character to use to put an item at the end of an alphabetic list?
...ur folder at the end of the list without having to resort to using the "z" combo: U+E83A: Private Use. In fact, I believe any of the Private Use characters will work. () Just copy and paste the character between the brackets.
...
Simple (non-secure) hash function for JavaScript? [duplicate]
...of lines of code, not hundreds of lines) hash function written in (browser-compatible) JavaScript? Ideally I'd like something that, when passed a string as input, produces something similar to the 32 character hexadecimal string that's the typical output of MD5, SHA1, etc. It doesn't have to be cr...
convert_tz returns null
...
I needed to restart the MySQL daemon too before it would come into effect (on Debian).
– Ekster
Jul 17 '14 at 8:50
3
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How do I tell Maven to use the latest version of a dependency?
...ke of reproducible builds", over 6 years ago.
Please refer to this Maven 3 compliant solution.
If you always want to use the newest version, Maven has two keywords you can use as an alternative to version ranges. You should use these options with care as you are no longer in control of the plugi...
Connect different Windows User in SQL Server Management Studio (2005 or later)
... for accessing remote resources - the application interacts with the local computer as the currently logged-in user, and interacts with remote computers as the user whose credentials you've given.
You'd still have to run multiple instances of SSMS, but at least you could connect as different window...