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filter for complete cases in data.frame using dplyr (case-wise deletion)
Is it possible to filter a data.frame for complete cases using dplyr? complete.cases with a list of all variables works, of course. But that is a) verbose when there are a lot of variables and b) impossible when the variable names are not known (e.g. in a function that processes any data.frame).
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This Handler class should be static or leaks might occur: IncomingHandler
I'm developing an Android 2.3.3 application with a service. I have this inside that service to communicate with Main activity:
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Is there a way to instantiate objects from a string holding their class name?
...of boost::variant<A, B, C, D, ...> instead. Like if you have a class Foo, Bar and Baz, it looks like this:
typedef boost::variant<Foo, Bar, Baz> variant_type;
template<typename T> variant_type createInstance() {
return variant_type(T());
}
typedef std::map<std::string, v...
Can you help me understand Moq Callback?
...ns; the other happens after the call returns.
var message = "";
mock.Setup(foo => foo.Execute(arg1: "ping", arg2: "pong"))
.Callback((x, y) =>
{
message = "Rally on!";
Console.WriteLine($"args before returns {x} {y}");
})
.Returns(message) // Rally on!
.Call...
Perform commands over ssh with Python
I'm writing a script to automate some command line commands in Python. At the moment I'm doing calls thus:
13 Answers
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SQL Query to concatenate column values from multiple rows in Oracle
Would it be possible to construct SQL to concatenate column values from
multiple rows?
10 Answers
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No Multiline Lambda in Python: Why not?
I've heard it said that multiline lambdas can't be added in Python because they would clash syntactically with the other syntax constructs in Python. I was thinking about this on the bus today and realized I couldn't think of a single Python construct that multiline lambdas clash with. Given that ...
Why does C++ need a separate header file?
... no concern for building separately, then you could do that by just having foo_interface.h include foo_implementation.h.
– Steve Jessop
Mar 19 '15 at 9:02
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How dangerous is it to access an array out of bounds?
...sting is that hyper-modern compilers may decide that if code tries to read foo[0] through foo[len-1] after having previously used a check of len against the array length to either execute or skip a piece of code, the compiler should feel free to run that other code unconditionally even if the applic...
NameError: name 'reduce' is not defined in Python
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