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Aggregate / summarize multiple variables per group (e.g. sum, mean)
From a data frame, is there a easy way to aggregate ( sum , mean , mam>x m> et c) multiple variables simultaneously?
8 Answer...
How do I determine the size of an object in Python?
...turn
correct results, but this does not
have to hold true for third-party
em>x m>tensions as it is implementation
specific.
Only the memory consumption directly attributed to the object is
accounted for, not the memory consumption of objects it refers to.
The default argument allows to define
a value whi...
How do I POST JSON data with cURL?
...e. However, I want to test it with cURL. I am trying to post a JSON data. Em>x m>ample data is like this:
24 Answers
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What tools are there for functional programming in C?
...
You can use GCC's nested functions to simulate lambda em>x m>pressions, in fact, I have a macro to do it for me:
#define lambda(return_type, function_body) \
({ \
return_type anon_func_name_ function_body \
anon_func_name_; \
})
Use like this:
int (*mam>x m>)(int, int) = la...
String, StringBuffer, and StringBuilder
...ng class because a String object is immutable.
If your string can change (em>x m>ample: lots of logic and operations in the construction of the string) and will only be accessed from a single thread, using a StringBuilder is good enough.
If your string can change, and will be accessed from multiple threa...
How do I loop through a date range?
... you could hit every other day, every third day, only weekdays, etc. For em>x m>ample, to return every third day starting with the "start" date, you could just call AddDays(3) in the loop instead of AddDays(1).
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How to make/get a multi size .ico file? [closed]
...e in a cross-platform desktop application (so that, e.g. on Windows, the 16m>x m>16 size is used for the app's top bar but a 32m>x m>32 size version is used when the various open apps are shown when using Alt-Tab). Once I have that .ico file, I know how to use it within my widget toolkit to get this effect, ...
Compare equality between two objects in NUnit
...o the guidelines here: msdn.microsoft.com/en-us/library/336aedhh(VS.80).aspm>x m>
– Michael Haren
Nov 25 '08 at 17:50
13
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How do I uninstall nodejs installed from pkg (Mac OS m>X m>)?
...here. Also, being a n00b to running .sh scripts myself, I had to $ chmod u+m>x m> uninstall-node.sh and then $ ./uninstall-node.sh before it worked for me. :)
– mhulse
Feb 19 '13 at 18:32
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How can I start an interactive console for Perl?
...ugger on a trivial program, like so:
perl -de1
Alternatively there's Alem>x m>is Sukrieh's Perl Console application, but I haven't used it.
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