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How expensive is RTTI?
... on many platforms (Linux, BSD and maybe embedded platforms, but not mingw32). If you know you'll always be on a blessed platform, RTTI is very close to free.
Gritty details:
GCC prefers to use a particular "vendor-neutral" C++ ABI[1], and always uses this ABI for Linux and BSD targets[2]. For pla...
Test if string is a number in Ruby on Rails
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Convert DataFrame column type from string to datetime, dd/mm/yyyy format
...'t strict).
Here it is in action:
In [11]: pd.to_datetime(pd.Series(['05/23/2005']))
Out[11]:
0 2005-05-23 00:00:00
dtype: datetime64[ns]
You can pass a specific format:
In [12]: pd.to_datetime(pd.Series(['05/23/2005']), format="%m/%d/%Y")
Out[12]:
0 2005-05-23
dtype: datetime64[ns]
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Showing which files have changed between two revisions
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2611
To compare the current branch against master branch:
$ git diff --name-status master
To comp...
Converting of Uri to String
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293
Uri to String
Uri uri;
String stringUri;
stringUri = uri.toString();
String to Uri
Uri uri...
Fetch frame count with ffmpeg
... question:
Media Info: Language "Undetermined (und)" - Type "vide:avc1" - 2525 samples
In this example the video stream has 2525 frames.
boxdumper
For MP4/M4V/M4A/MOV files.
boxdumper is a simple tool from l-smash. It will output a large amount of information. Under the stsz sample size box ...
Why is typeof null “object”?
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226
From the MDN page about the behaviour of the typeof operator:
null
// This stands since the...
Is there a combination of “LIKE” and “IN” in SQL?
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