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Is it safe to push_back an element from the same vector?
If the second push_back causes a reallocation, the reference to the first integer in the vector will no longer be valid. So this isn't safe?
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how to draw smooth curve through N points using javascript HTML5 canvas?
...he resulting line is not smooth. How can I produce a single curve between all the gathered points?
11 Answers
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Resolve build errors due to circular dependency amongst classes
...ember that the .cc and not the .h is the unit of compilation), you need to allocate space for object A. So, well, how much space then? Enough to store B! What's the size of B then? Enough to store A! Oops.
Clearly a circular reference that you must break.
You can break it by allowing the compiler ...
What is the difference between quiet NaN and signaling NaN?
...unit (FPU) or library if floating-point is implemented in software. A signalling NaN will produce a signal, usually in the form of exception from the FPU. Whether the exception is thrown depends on the state of the FPU.
C++11 adds a few language controls over the floating-point environment and pr...
Return positions of a regex match() in Javascript?
... @OnurYıldırım - here's a jsfiddle of it working...I've tested it all the way back to IE5...works great: jsfiddle.net/6uwn1vof
– Jimbo Jonny
Mar 29 '16 at 22:34
1
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#define macro for debug printing in C?
.... } while (0) idiom ensures that the code acts like a statement (function call). The unconditional use of the code ensures that the compiler always checks that your debug code is valid — but the optimizer will remove the code when DEBUG is 0.
If you want to work with #ifdef DEBUG, then change th...
What does extern inline do?
...e, static inline, and extern inline constructs; most pre-C99 compiler generally follow its lead.
GNU89:
inline: the function may be inlined (it's just a hint though). An out-of-line version is always emitted and externally visible. Hence you can only have such an inline defined in one compilatio...
Saving an Object (Data persistence)
...ics.
cPickle (or _pickle) vs pickle
It's almost always preferable to actually use the cPickle module rather than pickle because the former is written in C and is much faster. There are some subtle differences between them, but in most situations they're equivalent and the C version will provide gr...
Forced naming of parameters in Python
...(10, forcenamed=20)
10 20
>>> foo(10, 20)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: foo() takes exactly 1 positional argument (2 given)
This can also be combined with **kwargs:
def foo(pos, *, forcenamed, **kwargs):
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What is the difference between class and instance attributes?
...just look in each instance's __dict__ and the class's __dict__. It just usually doesn't matter very much whether immutable types are shared or not.
– abarnert
Oct 29 '14 at 22:58
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