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What's the simplest way to subtract a month from a date in Python?
...// 12
if not m: m = 12
d = min(date.day, [31,
29 if y%4==0 and (not y%100==0 or y%400 == 0) else 28,
31,30,31,30,31,31,30,31,30,31][m-1])
return date.replace(day=d,month=m, year=y)
>>> for m in range(-12, 12):
print(monthdelta(datetime.now(), m))
2009-...
brew install gcc too time consuming
I'm doing a clean install of Mavericks, and accidentally did
1 Answer
1
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How to get last items of a list in Python?
I need the last 9 numbers of a list and I'm sure there is a way to do it with slicing, but I can't seem to get it. I can get the first 9 like this:
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Initializing a struct to 0
...
The first is easiest(involves less typing), and it is guaranteed to work, all members will be set to 0[Ref 1].
The second is more readable.
The choice depends on user preference or the one which your coding standard mandates.
[Ref 1] Reference C99 Standard 6.7.8...
Swift alert view with OK and Cancel: which button tapped?
I have an alert view in Xcode written in Swift and I'd like to determine which button the user selected (it is a confirmation dialog) to do nothing or to execute something.
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Prevent users from submitting a form by hitting Enter
I have a survey on a website, and there seems to be some issues with the users hitting enter (I don't know why) and accidentally submitting the survey (form) without clicking the submit button. Is there a way to prevent this?
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Backwards migration with Django South
Ok, so this seems like a really silly thing to ask, and I'm sure I'm missing something somewhere.
3 Answers
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Location of sqlite database on the device
...base programmatically with the default way of extending SQLiteOpenHelper and overriding onCreate() . This way the db gets created on the fly when needed.
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How to set iPhone UIView z index?
...o move one view on top of another, how can I know the z index of the view, and how to move on to top?
9 Answers
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Is iterating ConcurrentHashMap values thread safe?
... obtain from a ConcurrentHashMap is designed to be used by a single thread and should not be passed around. This includes the syntactic sugar that the for-each loop provides.
What happens if I try to iterate the map with two threads at the same time?
It will work as expected if each of the thr...