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Most used parts of Boost [closed]
When I discovered boost::lexical_cast I thought to myself "why didn't I know about this sooner!" - I hated having to write code like
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How to identify whether a file is normal file or directory
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os.path.isdir() and os.path.isfile() should give you what you want. See:
http://docs.python.org/library/os.path.html
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Maximum Java heap size of a 32-bit JVM on a 64-bit OS
... OS, given that 32-bit OSes have a maximum addressable memory size of 4GB, and that the JVM's max heap size depends on how much contiguous free memory can be reserved.
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How is Docker different from a virtual machine?
I keep rereading the Docker documentation to try to understand the difference between Docker and a full VM. How does it manage to provide a full filesystem, isolated networking environment, etc. without being as heavy?
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Python: fastest way to create a list of n lists
...None, n)]
It does not have to create a new int object in every iteration and is about 15 % faster on my machine.
Edit: Using NumPy, you can avoid the Python loop using
d = numpy.empty((n, 0)).tolist()
but this is actually 2.5 times slower than the list comprehension.
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Get name of current script in Python
...less there. It is set by the import implementation, so if you use a non-standard import mechanism it might also be unset.
– Sven Marnach
May 3 '13 at 19:18
8
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Simplest way to do a recursive self-join?
...can preserve the tree order:
WITH q AS
(
SELECT m.*, CAST(ROW_NUMBER() OVER (ORDER BY m.PersonId) AS VARCHAR(MAX)) COLLATE Latin1_General_BIN AS bc
FROM mytable m
WHERE ParentID IS NULL
UNION ALL
SELECT m.*, q.bc + '.' + CAST(ROW_NUMBER() ...
How to rename a file using Python
... he probably just means that you should be aware of the current directory, and either specify the path relative to it, or just use the absolute path (like C:/folder/file.txt on Windows or /home/file.txt on Linux/MacOS).
– Alex P.
Jun 26 '19 at 14:24
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How to detect my browser version and operating system using JavaScript?
I have tried using the code below but it only display results in Chrome and Mozilla not working in IE6.
10 Answers
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Get Android API level of phone currently running my application [duplicate]
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Check android.os.Build.VERSION, which is a static class that holds various pieces of information about the Android OS a system is running.
If you care about all versions possible (back to original Android version), as in minSdkVer...