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Delete a key from a MongoDB document using Mongoose
...collection.update({_id: user._id}, {$unset: {field: 1 }});
Since version 2.0 you can do:
User.update({_id: user._id}, {$unset: {field: 1 }}, callback);
And since version 2.4, if you have an instance of a model already you can do:
doc.field = undefined;
doc.save(callback);
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iOS: Compare two dates
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210
According to Apple documentation of NSDate compare:
Returns an NSComparisonResult value th...
Is there a way to detach matplotlib plots so that the computation can continue?
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221
Use matplotlib's calls that won't block:
Using draw():
from matplotlib.pyplot import plot, dra...
can we use xpath with BeautifulSoup?
...you can use the .xpath() method to search for elements.
try:
# Python 2
from urllib2 import urlopen
except ImportError:
from urllib.request import urlopen
from lxml import etree
url = "http://www.example.com/servlet/av/ResultTemplate=AVResult.html"
response = urlopen(url)
htmlparser =...
Android Studio - How to increase Allocated Heap Size
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Batch equivalent of Bash backticks
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edited May 4 '10 at 21:32
Joey
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answer...
Changing the status bar text color in splash screen iOS 7
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224
In the project plist file add the "Status Bar Style" property (key is UIStatusBarStyle). Then...
How to set up Android emulator proxy settings
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How many random elements before MD5 produces collisions?
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Probability of just two hashes accidentally colliding is 1/2128 which is 1 in 340 undecillion 282 decillion 366 nonillion 920 octillion 938 septillion 463 sextillion 463 quintillion 374 quadrillion 607 trillion 431 billion 768 million 211 thousand 456.
However if you keep all the ha...
how to detect search engine bots with php?
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edited Mar 24 '09 at 13:57
answered Mar 24 '09 at 13:37
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