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data.frame rows to a list
...mp;
}
res.attr("names") = x.attr("row.names");
return res;
}
Now caompare with purrr:
benchmark(
purrr = by_row(x, function(v) list(v)[[1L]], .collate = "list")$.out,
rcpp = df2list(x)
)
Results:
Benchmark summary:
Time units : milliseconds
expr n.eval min lw.qu median m...
Calculate age given the birth date in the format YYYYMMDD
...on _calculateAge(birthday) { // birthday is a date
var ageDifMs = Date.now() - birthday.getTime();
var ageDate = new Date(ageDifMs); // miliseconds from epoch
return Math.abs(ageDate.getUTCFullYear() - 1970);
}
Disclaimer: This also has precision issues, so this cannot be completely tr...
Failed to import new Gradle project: failed to find Build Tools revision *.0.0
...
This is the most straightforward answer as of now. Thanks!
– Steven Carlton
Nov 15 '16 at 22:22
...
What is the 'dynamic' type in C# 4.0 used for?
... to tell the compiler that a variable's type can change or that it is not known until runtime. Think of it as being able to interact with an Object without having to cast it.
dynamic cust = GetCustomer();
cust.FirstName = "foo"; // works as expected
cust.Process(); // works as expected
cust.Missing...
CoffeeScript on Windows?
...tried this a while back and it didn't work, but I tried again recently and now all the standard CoffeeScript tests compile just fine.
A bit of plumbing code using a *.wsf file and coffee-script.js is all you need. My code is on GitHub: https://github.com/duncansmart/coffeescript-windows
I blogged ...
How to limit the amount of concurrent async I/O operations?
...hould be using since it's more performant than the original Semaphore), it now boasts the WaitAsync(...) series of overloads, with all of the expected arguments - timeout intervals, cancellation tokens, all of your usual scheduling friends :)
Stephen's also written a more recent blog post about the...
How to use a variable to specify column name in ggplot
...
From the release notes of ggplot2 V3.0.0 :
aes() now supports quasiquotation so that you can use !!, !!!, and
:=. This replaces aes_() and aes_string() which are now
soft-deprecated (but will remain around for a long time).
The idiomatic way now would be to convert ...
How does Windows 8 Runtime (WinRT / Windows Store apps / Windows 10 Universal App) compare to Silver
...nd the new Windows 8 Runtime that is used to create Metro style apps. I know you can use it with XAML and it is based on .NET so C# and VB.NET can be used to write the apps, but then it seems to have something to do with HTML, CSS, DOM, and JavaScript.
...
Difference between core and processor
...t the single CPU into two virtual CPUs i.e we have two cores for our task. Now the CPU is single, but it is only pretending (masqueraded) that it has a dual CPU and performs multiple tasks. But having real multiple cores will be better than that so people develop making multi-core processor i.e. mul...
jQuery UI Dialog - missing close icon
...ces of bootstrap "button()" function calls with "bootstrapBtn()". (Yes, I know the code comments kind of imply this, but I thought it was worth explicitly saying it.)
– Kornél Regius
Aug 20 '18 at 9:34
...