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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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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...
Sorting an IList in C#
...word of caution: this approach assumes that the IList<T> list can be cast to the non-generic IList interface. If you code your own class implementing the IList<T> interface, make sure you also implement the non-generic IList interface, or the code will fail with a class cast exception.
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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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What is the fastest integer division supporting division by zero no matter what the result is?
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Awesome. Can be made constexpr and avoid needless type casts like this: template<typename T, typename U> constexpr auto fdiv( T t, U u ) -> decltype(t/(u+!u)) { return t/(u+!u); } And if you want 255, (lhs)/(rhs+!rhs) & -!rhs
– Yakk - Adam Nevr...
Python: How to get stdout after running os.system? [duplicate]
...t
Or as a function (using shell=True was required for me on Python 2.6.7 and check_output was not added until 2.7, making it unusable here):
def system_call(command):
p = subprocess.Popen([command], stdout=subprocess.PIPE, shell=True)
return p.stdout.read()
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How do I get an empty array of any size in python?
...tiguous array to fill with integers, consider bytearray and memoryivew:
# cast() is available starting Python 3.3
size = 10**6
ints = memoryview(bytearray(size)).cast('i')
ints.contiguous, ints.itemsize, ints.shape
# (True, 4, (250000,))
ints[0]
# 0
ints[0] = 16
ints[0]
# 16
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Copy file or directories recursively in Python
Python seems to have functions for copying files (e.g. shutil.copy ) and functions for copying directories (e.g. shutil.copytree ) but I haven't found any function that handles both. Sure, it's trivial to check whether you want to copy a file or a directory, but it seems like a strange omission.
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What is the difference between the HashMap and Map objects in Java?
...s using the "Map" interface restricts you to only those methods unless you cast the collection back from Map to HashMap (which COMPLETELY defeats the purpose).
Often what you will do is create an object and fill it in using it's specific type (HashMap), in some kind of "create" or "initialize" meth...
How to set thousands separator in Java?
...println(formatter.format(bd.longValue()));
According to the JavaDoc, the cast in the first line should be save for most locales.
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