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Callback functions in C++
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Note: Most of the answers cover function pointers which is one possibility to achieve "callback" logic in C++, but as of today not the most favourable one I think.
What are callbacks(?) and why to use them(!)
A callback is a callable (see further down) accepted by a class or function, used to ...
How do I fix "The expression of type List needs unchecked conversion…'?
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Since getEntries returns a raw List, it could hold anything.
The warning-free approach is to create a new List<SyndEntry>, then cast each element of the sf.getEntries() result to SyndEntry before adding it to your new list. Collections.checkedList does no...
Create numpy matrix filled with NaNs
...ou rarely need loops for vector operations in numpy.
You can create an uninitialized array and assign to all entries at once:
>>> a = numpy.empty((3,3,))
>>> a[:] = numpy.nan
>>> a
array([[ NaN, NaN, NaN],
[ NaN, NaN, NaN],
[ NaN, NaN, NaN]])
I hav...
Comparison of DES, Triple DES, AES, blowfish encryption for data
...oes anyone have pros and cons together for comparing these encryption algorithms ?
8 Answers
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How to join two generators in Python?
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I think itertools.chain() should do it.
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What do *args and **kwargs mean? [duplicate]
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Putting *args and/or **kwargs as the last items in your function definition’s argument list allows that function to accept an arbitrary number of arguments and/or keyword arguments.
For example, if you wanted to write a function that returned the sum of all its ar...
I want my android application to be only run in portrait mode?
I want my android application to be only run in portrait mode?
How can I do that?
6 Answers
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Getting LaTeX into R Plots
...uld like to add LaTeX typesetting to elements of plots in R (e.g: the title, axis labels, annotations, etc.) using either the combination of base/lattice or with ggplot2 .
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what does -webkit-transform: translate3d(0,0,0); exactly do? Apply to body?
what does -webkit-transform: translate3d(0,0,0); exactly do?
Does it have any performance issues? Should I just apply it to the body or individual elements? It seems to improve scroll events drastically.
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What's the Best Way to Shuffle an NSMutableArray?
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You don't need the swapObjectAtIndex method. exchangeObjectAtIndex:withObjectAtIndex: already exists.
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