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Validating IPv4 addresses with regexp
I've been trying to get an efficient regex for IPv4 validation, but without much luck. It seemed at one point I had had it with (25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?(\.|$)){4} , but it produces some strange results:
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Android SDK installation doesn't find JDK
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Works for Windows XP as well. Thanks!
– Spidy
Feb 28 '11 at 16:02
1
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ADB No Devices Found
...ownloaded the Android SDK, installed "Android SDK Tools", "Android SDK Platform-tools", and Google USB Driver. I have checked the setting on my Nexus 10 for "Unknown Sources".
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How to find all the subclasses of a class given its name?
...ng(Bar): pass
Here are the names of the subclasses:
print([cls.__name__ for cls in Foo.__subclasses__()])
# ['Bar', 'Baz']
Here are the subclasses themselves:
print(Foo.__subclasses__())
# [<class '__main__.Bar'>, <class '__main__.Baz'>]
Confirmation that the subclasses do indeed...
Python memory usage of numpy arrays
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You can use array.nbytes for numpy arrays, for example:
>>> import numpy as np
>>> from sys import getsizeof
>>> a = [0] * 1024
>>> b = np.array(a)
>>> getsizeof(a)
8264
>>> b.nbytes
8192
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How do you turn a Mongoose document into a plain object?
I have a document from a mongoose find that I want to extend before JSON encoding and sending out as a response. If I try adding properties to the doc it is ignored. The properties don't appear in Object.getOwnPropertyNames(doc) making a normal extend not possible. The strange thing is that JSON....
Get raw POST body in Python Flask regardless of Content-Type header
...r explained that request.data is the raw post body, but will be empty if form data is parsed. How can I get the raw post body unconditionally?
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libxml/tree.h no such file or directory
...works section). On the Mac,
you'll find it at /usr/lib/libxml2.dylib and for the iPhone, you'll
want the
/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk/usr/lib/libxml2.dylib
version.
Since libxml2 is a .dylib (not a nice friendly .framework) we still
have one mo...
How to set default value to the input[type=“date”] [duplicate]
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The date should take the format YYYY-MM-DD. Single digit days and months should be padded with a 0. January is 01.
From the documentation:
A string representing a date.
Value: A valid full-date as defined in [RFC 3339], with the additional ...
Can dplyr package be used for conditional mutating?
...d - arithmetic/na_if If the values are numeric and the conditions (except for the default value of NA at the end) are mutually exclusive, as is the case in the question, then we can use an arithmetic expression such that each term is multiplied by the desired result using na_if at the end to replac...