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Django CharField vs TextField
What is the difference between CharField() and TextField() in Django? The documentation says that CharField() should be used for smaller strings and TextField() should be used for larger strings. Okay, but where is the line drawn between "small" and "large"? What's going on under the ho...
how do I use UIScrollView in Interface Builder?
While I've used UIScrollView successfully in the past by manipulating it programmatically, I'm having trouble getting it to work by setting it up exclusively in Interface Builder.
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Can I use a :before or :after pseudo-element on an input field?
...ey here");
API docs on .after
To append your content with javascript. This will work across all browsers.
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How to determine device screen size category (small, normal, large, xlarge) using code?
Is there any way to determine the category of screen size of the current device, such as small, normal, large, xlarge?
12 A...
Open another application from your own (intent)
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Firstly, the concept of "application" in Android is slightly an extended one.
An application - technically a process - can have multiple activities, services, content providers and/or broadcast listeners. If at least one of them is running, the application is up and runnin...
How can I set NODE_ENV=production on Windows?
...E_ENV="production"
Per @jsalonen's answer below. If you're in CMD (which is no longer maintained), use
set NODE_ENV=production
This should be executed in the command prompt where you intend to run your Node.js application.
The above line would set the environment variable NODE_ENV for the comm...
How do I assign a port mapping to an existing Docker container?
I'm not sure if I've misunderstood something here, but it seems like it's only possible to set port mappings by creating a new container from an image. Is there a way to assign a port mapping to an existing Docker container?
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Named regular expression group “(?Pregexp)”: what does “P” stand for?
...tupid -- what, P for Python?! -- but in my defense, I vaguely remembered this thread [emphasis mine]:
Subject: Claiming (?P...) regex syntax extensions
From: Guido van Rossum (gui...@CNRI.Reston.Va.US)
Date: Dec 10, 1997 3:36:19 pm
I have an unusual request for the Perl developer...
Creating functions in a loop
...sily fixed by forcing early binding: change def f(): to def f(i=i): like this:
def f(i=i):
return i
Default values (the right-hand i in i=i is a default value for argument name i, which is the left-hand i in i=i) are looked up at def time, not at call time, so essentially they're a way to spe...
How to remove duplicate values from a multi-dimensional array in PHP
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Here is another way. No intermediate variables are saved.
We used this to de-duplicate results from a variety of overlapping queries.
$input = array_map("unserialize", array_unique(array_map("serialize", $input)));
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