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How can I use threading in Python?
...below - it ends up being just a few lines of code:
from multiprocessing.dummy import Pool as ThreadPool
pool = ThreadPool(4)
results = pool.map(my_function, my_array)
Which is the multithreaded version of:
results = []
for item in my_array:
results.append(my_function(item))
Description
Map i...
Hidden features of mod_rewrite
...):
# logs can't be enabled from .htaccess
# loglevel > 2 is really spammy!
RewriteLog /path/to/rewrite.log
RewriteLogLevel 2
Common use cases
To funnel all requests to a single point:
RewriteEngine on
# ignore existing files
RewriteCond %{REQUEST_FILENAME} !-f
# ignore existing directori...
How can I find out the current route in Rails?
...nt_uri = request.env['PATH_INFO']
# If you are browsing http://example.com/my/test/path,
# then above line will yield current_uri as "/my/test/path"
To find out the route i.e. controller, action and params:
path = ActionController::Routing::Routes.recognize_path "/your/path/here/"
# ...or newer...
How do I read CSV data into a record array in NumPy?
..., by setting the delimiter kwarg to a comma.
from numpy import genfromtxt
my_data = genfromtxt('my_file.csv', delimiter=',')
More information on the function can be found at its respective documentation.
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Physical vs. logical / soft delete of database record?
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When deciding to use logical, physical deletes, or archiving I would ask myself these questions:
Is this data that might need to be re-inserted into the table. For example User Accounts fit this category as you might activate or deactivate a user account. If this is the case a logical delete mak...
What is @ModelAttribute in Spring MVC?
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I know this is an old thread, but I thought I throw my hat in the ring and see if I can muddy the water a little bit more :)
I found my initial struggle to understand @ModelAttribute was a result of Spring's decision to combine several annotations into one. It became clearer ...
Get source jar files attached to Eclipse for Maven-managed dependencies
...g Maven (and the Maven Eclipse Integration) to manage the dependencies for my Java projects in Eclipse. The automatic download feature for JAR files from the Maven repositories is a real time saver. Unfortunately, it does not include API documentation and source code.
...
In a django model custom save() method, how should you identify a new object?
... This is the best way. I used is_new = self._state.adding, then super(MyModel, self).save(*args, **kwargs) and then if is_new: my_custom_logic()
– kotrfa
Aug 28 '17 at 8:13
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How do you effectively model inheritance in a database?
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See my comment on the question. Using funny new names for Rdb technical terms that have existed leads to confusion. "TPT" is supertype-subtype. "TPH" is Unnormalised, a gross error. "TPH" is even less Normalised, another gross ...
LaTeX Optional Arguments
...ion in LaTeX!!! (that TeX code looks like greek to me)
well, just to add my recent (albeit not as flexible) development, here's what I've recently used in my thesis doc, with
\usepackage{ifthen} % provides conditonals...
Start the command, with the "optional" command set blank by default:
\ne...