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What is the difference between JOIN and UNION?
What is the difference between JOIN and UNION ? Can I have an example?
15 Answers
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Set transparent background using ImageMagick and commandline prompt
Suppose you have any image (PNG or JPG).
This image has a white background and I need to make this background transparent.
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Replacement for “rename” in dplyr
...e plyr's renaming function rename . I have recently started using dplyr, and was wondering if there is an easy way to rename variables using a function from dplyr, that is as easy to use as to plyr's rename ?
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A clean, lightweight alternative to Python's twisted? [closed]
...e. That was in my Python youth, in the days before I knew about the GIL and the associated woes it creates for multithreaded code (IE, most of the time stuff just ends up serialized!)...
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How to get the ThreadPoolExecutor to increase threads to max before queueing?
... this limitation in ThreadPoolExecutor where the queue needs to be bounded and full before more threads will be started.
I believe I have finally found a somewhat elegant (maybe a little hacky) solution to this limitation with ThreadPoolExecutor. It involves extending LinkedBlockingQueue to have ...
Pointer arithmetic for void pointer in C
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Final conclusion: arithmetic on a void* is illegal in both C and C++.
GCC allows it as an extension, see Arithmetic on void- and Function-Pointers (note that this section is part of the "C Extensions" chapter of the manual). Clang and ICC likely allow void* arithmetic for the purpose...
maximum value of int
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in C99 you can also use UINT64_MAX and INT64_MAX
– Dmitry Vyal
Oct 2 '13 at 9:08
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How to get root access on Android emulator?
I have All Android SDK versions(from 1.5 to 2.3.3), and I tried many methods for getting root in Android emulator. I don't use any Android device and test everything on emulator(AVD).
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Combine Date and Time columns using python pandas
I have a pandas dataframe with the following columns;
11 Answers
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Undefined, unspecified and implementation-defined behavior
What is undefined behavior in C and C++? What about unspecified behavior and implementation-defined behavior? What is the difference between them?
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