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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...
Like Operator in Entity Framework?
We're trying to implement the "LIKE" operator in Entity Framework for our entities with string fields, but it doesn't appear to be supported. Has anyone else tried to do something like this?
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How to write to Console.Out during execution of an MSTest test
...ally and without any special pattern. We have been trying to figure it out for a long time, adding debug information anywhere we can think it might help, crawling the logs etc, but we have not been able to reproduce or figure it out.
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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 to print SQL statement in codeigniter model
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well i figured my problem, oracle isn't accepting my date format, ive tried every format i think, it will only accept SYSDATE
– Technupe
May 26 '11 at 17:16
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Sleep for milliseconds
I know the POSIX sleep(x) function makes the program sleep for x seconds. Is there a function to make the program sleep for x milliseconds in C++?
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How to copy a row and insert in same table with a autoincrement field in MySQL?
... You could programatically get then names of the columns using INFORMATION_SCHEMA ... I wonder if you could do it as a sub-query and some string functions? Hmmm...
– Yzmir Ramirez
Feb 6 '12 at 6:35
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Mismatched anonymous define() module
I'm getting this error when I browse my webapp for the first time (usually in a browser with disabled cache).
7 Answers
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iPhone Data Usage Tracking/Monitoring
...erent functions, voicemail, general networking interface.
I read in Apple forum that :
The OS does not keep network statistics on a process-by-process basis. As such, there's no exact solution to this problem. You can, however, get network statistics for each network interface.
In general en0 is y...
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...