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What's the difference between using CGFloat and float?
...d to use CGFloat all over the place, but I wonder if I get a senseless "performance hit" with this. CGFloat seems to be something "heavier" than float, right? At which points should I use CGFloat, and what makes really the difference?
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How to duplicate sys.stdout to a log file?
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Since you're comfortable spawning external processes from your code, you could use tee itself. I don't know of any Unix system calls that do exactly what tee does.
# Note this version was written circa Python 2.6, see below for
# an update...
Traverse a list in reverse order in Python
... reversed() function:
>>> a = ["foo", "bar", "baz"]
>>> for i in reversed(a):
... print(i)
...
baz
bar
foo
To also access the original index, use enumerate() on your list before passing it to reversed():
>>> for i, e in reversed(list(enumerate(a))):
... print(...
When saving, how can you check if a field has changed?
...gs, **kwargs)
self.__original_name = self.name
def save(self, force_insert=False, force_update=False, *args, **kwargs):
if self.name != self.__original_name:
# name changed - do something here
super(Person, self).save(force_insert, force_update, *args, **kwa...
Detect URLs in text with JavaScript
Does anyone have suggestions for detecting URLs in a set of strings?
13 Answers
13
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How to read a single character from the user?
Is there a way of reading one single character from the user input? For instance, they press one key at the terminal and it is returned (sort of like getch() ). I know there's a function in Windows for it, but I'd like something that is cross-platform.
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Detect blocked popup in Chrome
...g similar), you could use the ready() event (or something similar) to wait for the DOM to load before checking the window offset. The danger in this is that Safari detection works in a conflicting way: the popup's DOM will never be ready() in Safari because it'll give you a valid handle for the wind...
django urls without a trailing slash do not redirect
...sed if CommonMiddleware is installed...". I prefer Michael Gendin's answer for a cleaner solution.
– Wtower
Feb 11 '15 at 9:26
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Understanding Python super() with __init__() methods [duplicate]
...ildB(Base):
def __init__(self):
mro = type(self).mro()
for next_class in mro[mro.index(ChildB) + 1:]: # slice to end
if hasattr(next_class, '__init__'):
next_class.__init__(self)
break
If we didn't have the super object, we'd have to ...
Installing Python packages from local file system folder to virtualenv with pip
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I am pretty sure that what you are looking for is called --find-links option.
Though you might need to generate a dummy index.html for your local package index which lists the links to all packages. This tool helps:
https://github.com/wolever/pip2pi
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