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what is the most efficient way of counting occurrences in pandas?
... What about counting over the entire DataFrame? This works for one column.
– Vaidøtas I.
Jan 23 at 8:49
2
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Relative paths based on file location instead of current working directory [duplicate]
...wered Jun 9 '14 at 1:55
Martin KonecnyMartin Konecny
47.5k1818 gold badges110110 silver badges142142 bronze badges
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What is a ViewModelLocator and what are its pros/cons compared to DataTemplates?
Can someone give me a quick summary of what a ViewModelLocator is, how it works, and what the pros/cons are for using it compared to DataTemplates?
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How to get pixel data from a UIImage (Cocoa Touch) or CGImage (Core Graphics)?
... NSUInteger bytesPerRow = bytesPerPixel * width;
NSUInteger bitsPerComponent = 8;
CGContextRef context = CGBitmapContextCreate(rawData, width, height,
bitsPerComponent, bytesPerRow, colorSpace,
kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);...
What is the difference between Serialization and Marshaling?
...m a primitive form such as a byte stream. In this sense, serialization is one means to perform marshaling, usually implementing pass-by-value semantics.
It is also possible for an object to be marshaled by reference, in which case the data "on the wire" is simply location information for the origi...
AngularJS $http, CORS and http authentication
...authentication with AngularJS can be tricky I edited the question to share one learned lesson. First I want to thank igorzg. His answer helped me a lot. The scenario is the following: You want to send POST request to a different domain with AngularJS $http service. There are several tricky things to...
Force Java timezone as GMT/UTC
... need to force any time related operations to GMT/UTC, regardless the timezone set on the machine. Any convenient way to so in code?
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Hidden Features of JavaScript? [closed]
...Crockford's excellent book
JavaScript: The Good Parts.
But I'll take just one for you, always use === and !== instead of == and !=
alert('' == '0'); //false
alert(0 == ''); // true
alert(0 =='0'); // true
== is not transitive. If you use === it would give false for
all of these statements as ex...
Git on Windows: How do you set up a mergetool?
...to global git config, i.e. valid for all git projects not just the current one
the custom tool config value resides in "mergetool.[tool].cmd", not "merge.[tool].cmd" (silly me, spent an hour troubleshooting why git kept complaining about non-existing tool)
added double quotes for all file names so t...
JPA: what is the proper pattern for iterating over large result sets?
...e and has fewer than 100 elements checking size() == 100 instead will skip one additional query that returns empty list
– cdalxndr
May 12 at 18:52
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