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data.frame rows to a list
...(benchr)
library(purrr)
benchmark(
split = split(x, seq_len(.row_names_info(x, 2L))),
mapply = .mapply(function(...) structure(list(...), class = "data.frame", row.names = 1L), x, NULL),
purrr = by_row(x, function(v) list(v)[[1L]], .collate = "list")$.out
)
Rsults:
Benchmark summary:
...
Get hostname of current request in node.js Express
....12/api/http.html#http.ServerRequest
If you're looking for machine/native information, try the process object.
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Automatic Retina images for web sites
...planation about why and how to use srcset
Chris Coyer's post for more good info
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How do I write a short literal in C++?
...tandard extension and aren't portable. In fact, I couldn't even locate any info on these suffixes on MSDN.
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An algorithm for inflating/deflating (offsetting, buffering) polygons
... return coordinates;
}
The result is something like this:
Additional info: I usually use this type of inflating/deflating (a little modified for my purposes) for setting boundaries with radius on polygons that are drawn on a map (with Leaflet or Google maps). You just convert (lat,lng) pairs t...
How do I check if a string is unicode or ascii?
...ly workaround is to check the Python version number, e.g.:
if sys.version_info >= (3,0,0):
# for Python 3
if isinstance(s, bytes):
s = s.decode('ascii') # or s = str(s)[2:-1]
else:
# for Python 2
if isinstance(s, unicode):
s = str(s)
Those are both unpythonic,...
Compare two objects' properties to find differences?
...This will only use public properties. Is that enough?
foreach (PropertyInfo propertyInfo in firstType.GetProperties())
{
if (propertyInfo.CanRead)
{
object firstValue = propertyInfo.GetValue(first, null);
object secondValue = propertyInfo.GetValue(seco...
Naming returned columns in Pandas aggregate function? [duplicate]
...nt to have a behavior similar to JMP, creating column titles that keep all info from the multi index you can use:
newidx = []
for (n1,n2) in df.columns.ravel():
newidx.append("%s-%s" % (n1,n2))
df.columns=newidx
It will change your dataframe from:
I V
mean ...
How to copy a local Git branch to a remote repo
...
tl;dr
$ git push --set-upstream origin your_new_branch
more info
after you have made few commits into your:
$ git checkout -b your_new_branch
$ git add file
$ git commit -m "changed file"
you push your branch specifying an upstream into one of the remotes repositories like followi...
SELECT INTO a table variable in T-SQL
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Really wish the accepted answer included this info!
– Davie Brown
Sep 16 '15 at 12:45
I g...