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Is it better to use std::memcpy() or std::copy() in terms to performance?
...ion. In my test, I hash 5 strings using all four SHA-2 versions (224, 256, 384, 512), and I loop 300 times. I measure times using Boost.timer. That 300 loop counter is enough to completely stabilize my results. I ran the test 5 times each, alternating between the memcpy version and the std::copy ver...
How to check whether a string is Base64 encoded or not
... if a string is base64 encoded or not:
^([A-Za-z0-9+/]{4})*([A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{2}==)?$
In base64 encoding, the character set is [A-Z, a-z, 0-9, and + /]. If the rest length is less than 4, the string is padded with '=' characters.
^([A-Za-z0-9+/]{4})* means the string starts with 0 ...
Python: Check if one dictionary is a subset of another larger dictionary
... think of: d1.viewitems() <= d2.viewitems(). Timeit runs showed over a 3x performance improvement. If not hashable, even using iteritems() instead of items() leads to about a 1.2x improvement. This was done using Python 2.7.
– Chad
Mar 29 '16 at 21:47
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How do I create a datetime in Python from milliseconds?
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223
Just convert it to timestamp
datetime.datetime.fromtimestamp(ms/1000.0)
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Convert object to JSON in Android
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Akshay
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answered Apr 6 '11 at 18:20
James LJames L
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How should I copy Strings in Java?
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@GriffeyDog: I am reading the question less literally. What I am saying is that it is safe to give out references to a string object without...
Linq to SQL how to do “where [column] in (list of values)”
...eId is Integer??
– Kiran Solkar
Dec 3 '16 at 8:53
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How to use ADB to send touch events to device using sendevent command?
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134
Android comes with an input command-line tool that can simulate miscellaneous input events. To ...
instanceof Vs getClass( )
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The reason that the performance of instanceof and getClass() == ... is different is that they a...
How to comment in Vim's config files: “.vimrc”?
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