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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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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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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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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...
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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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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Python: How to get stdout after running os.system? [duplicate]
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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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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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