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Adding a column to a data.frame
... add a column to your data using various techniques. The quotes below come from the "Details" section of the relevant help text, [[.data.frame.
Data frames can be indexed in several modes. When [ and [[ are used with a single vector index (x[i] or x[[i]]), they index the data frame as if it were...
When is TCP option SO_LINGER (0) required?
...w, the option is used. The customer complains about RST as response to FIN from its side on connection close from its side.
...
Kill a Process by Looking up the Port being used by it from a .BAT
...Morgan-Graham as this is an accepted answer, please consider adding points from stackoverflow.com/a/20637662/5243762 this answer as well
– IAmSurajBobade
Oct 10 '19 at 6:58
...
Java 8 stream reverse order
...reverse IntStream, try something like this:
static IntStream revRange(int from, int to) {
return IntStream.range(from, to)
.map(i -> to - i + from - 1);
}
This avoids boxing and sorting.
For the general question of how to reverse a stream of any type, I don't know of t...
Reverse colormap in matplotlib
...lotlib.colors provides a function ListedColormap() to generate a color map from a list. So you can reverse any color map by doing
colormap_r = ListedColormap(colormap.colors[::-1])
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improv...
What is ApplicationException for in .NET?
...ications, not the common language runtime, throw custom exceptions derived from the ApplicationException class. The ApplicationException class differentiates between exceptions defined by applications versus exceptions defined by the system.
If you are designing an application that needs to create i...
Converting datetime.date to UTC timestamp in Python
...
If d = date(2011, 1, 1) is in UTC:
>>> from datetime import datetime, date
>>> import calendar
>>> timestamp1 = calendar.timegm(d.timetuple())
>>> datetime.utcfromtimestamp(timestamp1)
datetime.datetime(2011, 1, 1, 0, 0)
If d is in loc...
How to get city name from latitude and longitude coordinates in Google Maps?
...
From a Geocoder object, you can call the getFromLocation(double, double, int) method. It will return a list of Address objects that have a method getLocality().
Geocoder gcd = new Geocoder(context, Locale.getDefault());
List...
Converting string into datetime
...ts of formats, with the format determined by a format string you give it:
from datetime import datetime
datetime_object = datetime.strptime('Jun 1 2005 1:33PM', '%b %d %Y %I:%M%p')
The resulting datetime object is timezone-naive.
Links:
Python documentation for strptime: Python 2, Python 3
P...
tinyxml XML解析库下载（tinyxml2.h 和 tinyxml2.cpp） - 源码下载 - 清泛...
...anty. In no event will the authors be held liable for any
damages arising from the use of this software.
Permission is granted to anyone to use this software for any
purpose, including commercial applications, and to alter it and
redistribute it freely, subject to the following restrictions:
...