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Fastest way to replace NAs in a large data.table
...m elapsed
18.805 12.301 134.985
system.time(a_andrie = f_andrie(dt1))
Error: cannot allocate vector of size 305.2 Mb
Timing stopped at: 14.541 7.764 68.285
system.time(f_dowle(dt1))
user system elapsed
7.452 4.144 19.590 # EDIT has faster than this
identical(a_gdata, dt1)
[1] ...
Checking if an object is null in C#
...ing the constant first turns the bonehead typo null = data into a compiler error, rather than an unintentional assignment. (Also works for ==.)
– jpmc26
Jun 27 '14 at 16:08
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Troubleshooting “The use statement with non-compound name … has no effect”
Getting this error when I put use Blog; at the top.
5 Answers
5
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java.net.UnknownHostException: Invalid hostname for server: local
What are the steps I should take to solve the error:
13 Answers
13
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In Flux architecture, how do you manage Store lifecycle?
...local cache, retrieving data from the server, optimistic rendering and XHR error states, but this is the general idea.
If a particular pseudo-page does not need all the Stores in the application, I'm not entirely sure there is any reason to destroy the unused ones, other than memory constraints. B...
Difference between `const shared_ptr` and `shared_ptr`?
...t; sA(new A);
shared_ptr<A> sA2(new A);
sA = sA2; // compile-error
return sA;
}
shared_ptr<A> f2() {
shared_ptr<const A> sA(new A);
sA->a = 4; // compile-error
return sA;
}
int main(int argc, char** argv) {
f1();
f2();
return 0;
}
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How to uninstall a Windows Service when there is no executable for it left on the system?
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If you get error 1072, make sure you don't have the services control panel open (see this other question)
– Giles
Feb 8 '17 at 11:17
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How do I use regex in a SQLite query?
...ed by default and so use of the REGEXP operator will normally result in an error message. If a application-defined SQL function named "regexp" is added at run-time, that function will be called in order to implement the REGEXP operator. (sqlite.org/lang_expr.html#regexp)
– radi...
What is the $? (dollar question mark) variable in shell scripting? [duplicate]
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Not just error code. It's the returned status code of any command.
– mehulkar
Jul 8 '14 at 17:44
10
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Using property() on classmethods
.... I tried to use the property() function with these, but it results in an error. I was able to reproduce the error with the following in the interpreter:
...