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Interface or an Abstract Class: which one to use?
Please explain when I should use a PHP interface and when I should use an abstract class ?
11 Answers
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How do I copy an entire directory of files into an existing directory using Python?
...t the start. No part of the code actually would have a problem with a pre-existing dir. This needs to be changed. At least provide an exist_ok=False parameter to the call
– cfi
Sep 26 '12 at 16:05
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How do I delete an exported environment variable?
... home directory for it. Or, to see where it is being set, try "grep -r <X> ~" where <X> is the name of the variable. This may take a while if you have a lot of files in your home directory.
– matt5784
May 8 '14 at 1:11
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Extract a regular expression match
I'm trying to extract a number from a string.
12 Answers
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How to wrap text in LaTeX tables?
I am creating a report in LaTeX which involves a few tables. I'm stuck on that as my cell data in the table is exceeding the width of the page. Can I somehow wrap the text so that it falls into the next line in the same cell of the table?
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How does zip(*[iter(s)]*n) work in Python?
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iter() is an iterator over a sequence. [x] * n produces a list containing n quantity of x, i.e. a list of length n, where each element is x. *arg unpacks a sequence into arguments for a function call. Therefore you're passing the same iterator 3 times to zip(), and...
Is there a function in python to split a word into a list? [duplicate]
...issen: I get "ValueError: empty separator" when trying that. The empty regex is not terribly well defined.
– Greg Hewgill
Aug 17 '10 at 5:23
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Size of Matrix OpenCV
...m new to OpenCV. Could you please tell me how to obtain the size of a matrix in OpenCV?. I googled and I am still searching, but if any of you know the answer, please help me.
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Checking if sys.argv[x] is defined
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In the end, the difference between try, except and testing len(sys.argv) isn't all that significant. They're both a bit hackish compared to argparse.
This occurs to me, though -- as a sort of low-budget argparse:
arg_names = ['command', 'x', 'y', 'operation', 'opt...