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Pandas count(distinct) equivalent
I am using pandas as a db substitute as I have multiple databases (oracle, mssql, etc) and I am unable to make a sequence of commands to a SQL equivalent.
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Why does the order in which libraries are linked sometimes cause errors in GCC?
...the history on this answer to get the more elaborate text, but I now think it's easier for the reader to see real command lines).
Common files shared by all below commands
$ cat a.cpp
extern int a;
int main() {
return a;
}
$ cat b.cpp
extern int b;
int a = b;
$ cat d.cpp
int b;
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Add string in a certain position in Python
...re any function in Python that I can use to insert a value in a certain position of a string?
8 Answers
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Javascript Cookie with no expiration date
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edited Jul 31 at 9:35
Parsa Yazdani
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answered Feb 10 '09 at...
jQuery date formatting
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jQuery dateFormat is a separate plugin. You need to load that explicitly using a <script> tag.
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Floating point vs integer calculations on modern hardware
I am doing some performance critical work in C++, and we are currently using integer calculations for problems that are inherently floating point because "its faster". This causes a whole lot of annoying problems and adds a lot of annoying code.
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What's the best/easiest GUI Library for Ruby? [closed]
...ended to be a really simple GUI framework. I don't know how fully featured it is, though.
Some good code samples can be found in the tutorials.
Also, I think shoes powers hackety hack, a compelling programming learning environment for youngsters.
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Get current time in milliseconds in Python?
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edited Sep 9 '13 at 21:24
answered May 13 '11 at 22:21
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Where are shared preferences stored?
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edited Oct 16 '17 at 14:04
sziraqui
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The point of test %eax %eax [duplicate]
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CMP subtracts the operands and sets the flags. Namely, it sets the zero flag if the difference is zero (operands are equal).
TEST sets the zero flag, ZF, when the result of the AND operation is zero. If two operands are equal, their bitwise AND is zero when both are zero. TEST a...