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When is “i += x” different from “i = i + x” in Python?
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This depends entirely on the object i.
+= calls the __iadd__ method (if it exists -- falling back on __add__ if it doesn't exist) whereas + calls the __add__ method1 or the __radd__ method in a few cases2.
From an API perspective, __iadd__ is supposed to be used fo...
When do items in HTML5 local storage expire?
...may run into space considerations. It's good to program defensively. Generally however things remain "forever" based on some practical definition of that word.
edit — obviously, your own application can actively remove stuff if it decides it's too old. That is, you can explicitly include some so...
Creating Threads in python
...see how:
from threading import Thread
from time import sleep
def threaded_function(arg):
for i in range(arg):
print("running")
sleep(1)
if __name__ == "__main__":
thread = Thread(target = threaded_function, args = (10, ))
thread.start()
thread.join()
print("th...
pip broke. how to fix DistributionNotFound error?
...s problem in my MacBook, the reason is because as @Stephan said, I use easy_install to install pip, and the mixture of both py package manage tools led to the pkg_resources.DistributionNotFound problem.
The resolve is:
easy_install --upgrade pip
Remember: just use one of the above tools to manag...
What is the { get; set; } syntax in C#?
I am learning ASP.NET MVC and I can read English documents, but I don't really understand what is happening in this code:
1...
Get URL query string parameters
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This is actually the best answer based on the question. The other answers only get the current URI whereas the question only specifies "from URL".
– Chris Harrison
Aug 29 '13 at 5:38
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Best way to test for a variable's existence in PHP; isset() is clearly broken
... This looks a bit ugly to me, but in the case where you're actually checking an array element, it makes much more sense: isset($foo[$bar]) becomes array_key_exists($bar, $foo)
– Arild
Aug 25 '14 at 14:12
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How to force use of overflow menu on devices with menu button
I'd like to have all of the menu items that don't fit into the ActionBar go into the overflow menu (the one that is reached from the Action Bar not the menu button) even on devices that do have a Menu button . This seems much more intuitive for users than throwing them into a separate menu list th...
Container View Controller Examples [closed]
...d an example implementation would be nice. Google has turned up nothing at all.
7 Answers
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Make sure only a single instance of a program is running
...ode version is available singleton.py. Please file bugs here.
You can install tend using one of the following methods:
easy_install tendo
pip install tendo
manually by getting it from http://pypi.python.org/pypi/tendo
sh...