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Bash if statement with multiple conditions throws an error
...which prevents the shell from recognizing it as an operator at all. Please read BashFAQ #17 (on grouping) and #31 (on the difference between different types of test expression). Actually, in this case it would be even easier to use an arithmetic expression.
– Gordon Davisson
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What are some common uses for Python decorators? [closed]
...ts, since Python 2.5 you can use a with statement in conjunction with a threading.Lock (or multiprocessing.Lock since version 2.6) object to simplify the decorator's implementation to just:
import functools
def synchronized(lock):
""" Synchronization decorator """
def wrap(f):
@fu...
Best way to show a loading/progress indicator?
...();
OR
ProgressDialog.show(this, "Loading", "Wait while loading...");
Read more here.
By the way, Spinner has a different meaning in Android. (It's like the select dropdown in HTML)
share
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im...
Single huge .css file vs. multiple smaller specific .css files? [closed]
...h options have their pros and cons in my opinion.
I personally don't love reading through a single HUGE CSS file, and maintaining it is very difficult. On the other hand, splitting it out causes extra http requests which could potentially slow things down.
My opinion would be one of two things.
...
Regex Named Groups in Java
...our own version of Regex...
That is precisely what Gorbush2 did in this thread.
Regex2
(limited implementation, as pointed out again by tchrist, as it looks only for ASCII identifiers. tchrist details the limitation as:
only being able to have one named group per same name (which you don’t ...
How to generate an openSSL key using a passphrase from the command line?
...This expects the encrypted private key on standard input - you can instead read it from a file using -in <file>).
Example of creating a 3072-bit private and public key pair in files, with the private key pair encrypted with password foobar:
openssl genrsa -aes128 -passout pass:foobar -out ...
How To Create a Flexible Plug-In Architecture?
...up your App to plugins model (the article in Kalkie's post is great). I've read a bit on the way eclipse does things, but nothing more than that.
Yegge's properties blog talks a bit about how the use of the properties pattern allows for plugins and extensibility.
Most of the work I've done has us...
What are “signed” cookies in connect/expressjs?
...of the value (current cookie), and base64 encoded it. When the cookie gets read, it recalculates the signature and makes sure that it matches the signature attached to it.
If it does not match, then it will give an error.
If you want to hide the contents of the cookie as well, you should encrypt i...
Git commit with no commit message
...ine of the commit message is used all over the place within git; for more, read "A Note About Git Commit Messages".
If you open Terminal.app, cd to your project directory, and git commit -am '', you will see that it fails because an empty commit message is not allowed. Newer versions of git have th...
In which scenario do I use a particular STL container?
I've been reading up on STL containers in my book on C++, specifically the section on the STL and its containers. Now I do understand each and every one of them have their own specific properties, and I'm close to memorizing all of them... But what I do not yet grasp is in which scenario each of the...