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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.
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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...
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...
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
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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...
Converting datetime.date to UTC timestamp in Python
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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...
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...
How to get city name from latitude and longitude coordinates in Google Maps?
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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...
How do I close an open port from the terminal on the Mac?
I opened port #5955 from a java class to comunicate from a client. How do i close this port after I am done? and also which command can show me if port open or closed?
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How to read from a file or STDIN in Bash?
The following Perl script ( my.pl ) can read from either the file on the command line args or from STDIN:
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