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What does “abstract over” mean?
...er the phrase "abstract over", but I don't understand the intent. For example , Martin Odersky writes
6 Answers
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Getting back old copy paste behaviour in tmux, with mouse
This is what I used to do in tmux to copy-paste (using the mouse, the keyboard works differently and it is not what I am interested about):
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Regex expressions in Java, \\s vs. \\s+
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The first one matches a single whitespace, whereas the second one matches one or many whitespaces. They're the so-called regular expression quantifiers, and they perform matches like this (taken from the documentation):
Greedy quantifiers...
How to do relative imports in Python?
Imagine this directory structure:
15 Answers
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postgresql - replace all instances of a string within text field
...stgresql, how do I replace all instances of a string within a database column?
4 Answers
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How to tell where a header file is included from?
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This will give make dependencies which list absolute paths of include files:
gcc -M showtime.c
If you don't want the system includes (i.e. #include <something.h>) then use:
gcc -MM showtime.c
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Is there a generator version of `string.split()` in Python?
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It is highly probable that re.finditer uses fairly minimal memory overhead.
def split_iter(string):
return (x.group(0) for x in re.finditer(r"[A-Za-z']+", string))
Demo:
>>> list( split_iter("A programmer's RegEx test.") )
['A', "programmer's", 'RegEx', 'test...
std::function and std::bind: what are they, and when should they be used?
I know what functors are and when to use them with std algorithms, but I haven't understood what Stroustrup says about them in the C++11 FAQ .
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What happens when a duplicate key is put into a HashMap?
If I pass the same key multiple times to HashMap ’s put method, what happens to the original value? And what if even the value repeats? I didn’t find any documentation on this.
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How to print colored text in Python?
How can I output colored text to the terminal in Python?
46 Answers
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