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How to remove a field completely from a MongoDB document?
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Try this: If your collection was 'example'
db.example.update({}, {$unset: {words:1}}, false, true);
Refer this:
http://www.mongodb.org/display/DOCS/Updating#Updating-%24unset
UPDATE:
The above link no longer covers '$unset'ing. ...
Python Threading String Arguments
...sLine, args=[dRecieved]) # <- 1 element list
processThread.start()
If you notice, from the stack trace: self.__target(*self.__args, **self.__kwargs)
The *self.__args turns your string into a list of characters, passing them to the processLine
function. If you pass it a one element list, it...
How can I check whether a numpy array is empty or not?
... there are no elements in the array:
import numpy as np
a = np.array([])
if a.size == 0:
# Do something when `a` is empty
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How do I change the color of the text in a UIPickerView under iOS 7?
... using the view it passes in reusingView: how do I change it to use a different text color? If I use view.backgroundColor = [UIColor whiteColor]; none of the views show up anymore.
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How do I create an average from a Ruby array?
...viously, an average only makes sense for things that can be averaged). But if you want to go that route, use this:
class Array
def sum
inject(0.0) { |result, el| result + el }
end
def mean
sum / size
end
end
If you haven't seen inject before, it's not as magical as it might appe...
Running a Haskell program on the Android OS
... code between Java-C-Haskell, the former option is the easier solution and if I remember correctly might actually be backwards compatible with previous versions of Android below 2.3.
Once you have this you must build Haskell code as shared library or static library which gets linked into the NDK ja...
GRANT EXECUTE to all stored procedures
...d procedure.
You can also restrict by granting schema execute permissions if you want to be more granular:
GRANT EXECUTE ON SCHEMA ::dbo TO [MyDomain\MyUser]
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How to modify PATH for Homebrew?
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This is also the best solution I've found if your problem is that RVM and Homebrew both seem to be competing for same real estate in your .bash_profile file.
– MCB
Feb 22 '14 at 18:14
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Prevent form redirect OR refresh on submit?
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Amazing. Where can I find specification docs explaining that false prevents submission?
– davide
Jan 3 '15 at 3:33
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Convert Long into Integer
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Integer i = theLong != null ? theLong.intValue() : null;
or if you don't need to worry about null:
// auto-unboxing does not go from Long to int directly, so
Integer i = (int) (long) theLong;
And in both situations, you might run into overflows (because a Long can store a wider ran...