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Find which version of package is installed with pip
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Pip 1.3 now also has a list command:
$ pip list
argparse (1.2.1)
pip (1.5.1)
setuptools (2.1)
wsgiref (0.1.2)
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What's the (hidden) cost of Scala's lazy val?
...o Java 1.4. Since Java 1.5 volatile keyword has a bit stricter meaning and now such double checking is OK.
– iirekm
Sep 28 '11 at 8:21
8
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How to avoid .pyc files?
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From "What’s New in Python 2.6 - Interpreter Changes":
Python can now be prevented from
writing .pyc or .pyo files by
supplying the -B switch to the Python
interpreter, or by setting the
PYTHONDONTWRITEBYTECODE environment
variable before running the
interpreter. This setting is...
back button callback in navigationController in iOS
...indexOfObject:self]==NSNotFound) {
// back button was pressed. We know this is true because self is no longer
// in the navigation stack.
}
[super viewWillDisappear:animated];
}
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UIRefreshControl without UITableViewController
... split second. Anyone else experience this or have a fix for it? (yup, I know this is unsupported in the first place!)
– Tim
Nov 21 '12 at 3:58
6
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How do I integrate Ajax with Django applications?
...eturn the index.html and replace all the variables as asked (you probably know all this by now).
Now let's talk about AJAX. AJAX calls are client-side code that does asynchronous requests. That sounds complicated, but it simply means it does a request for you in the background and then handles the ...
Creating a singleton in Python
... http://googletesting.blogspot.com/2008/08/root-cause-of-singletons.html:
Now, there is one kind of Singleton which is OK. That is a singleton where all of the reachable objects are immutable. If all objects are immutable than Singleton has no global state, as everything is constant. But it is so e...
Wrap a delegate in an IEqualityComparer
...f your ignore problems with defining a correct hashcode), but I'd like to know if there is an out-of-the-box solution.
13 A...
Difference between Role and GrantedAuthority in Spring Security
...s added, a profile is assigned to it (having all permissible permissions). Now when ever user try to perform some action, permission/role for that action is checked against user grantedAuthorities.
Also the defaultn RoleVoter uses prefix ROLE_, so any authority starting with ROLE_ is considered as ...
python exception message capturing
...ogger.error(e, exc_info=True)
... exception handling ...
This is now the old way (though still works):
import sys, traceback
def catchEverything():
try:
... some operation(s) ...
except:
exc_type, exc_value, exc_traceback = sys.exc_info()
... exception han...