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Should I pass an std::function by const-reference?
...e are forced to copy the std::function.
That store makes passing by value more optimal. If there is any possibility you are storing a copy of the std::function, pass by value. Otherwise, either way is roughly equivalent: the only downside to by-value is if you are taking the same bulky std::funct...
Uses for Optional
...atches use case #1 in the OP's question. Although, absence of a value is a more precise formulation than null since something like IntStream.findFirst could never return null.
For use case #2, passing an optional argument to a method, this could be made to work, but it's rather clumsy. Suppose you ...
JavaScript Chart Library
...ick a Canvas-based solution. This article on Sencha Touch Charts goes into more details on mobile charting in general, and why Sencha Touch went the Canvas route.
– Pallavi Anderson
Aug 1 '11 at 20:55
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Centering a div block without the width
...d tabular.
[PS. never use ‘pt’ for font sizes on the web. ‘px’ is more reliable if you really need fixed size text, otherwise relative units like ‘%’ are better. And “clear: ccc both” — a typo?]
.center{
text-align:center;
}
.center > div{ /* N.B. child combinators do...
How do I specify a pointer to an overloaded function?
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Returning unique_ptr from functions
... as if the object were designated by an rvalue.
Just wanted to add one more point that returning by value should be the default choice here because a named value in the return statement in the worst case, i.e. without elisions in C++11, C++14 and C++17 is treated as an rvalue. So for example th...
Is there a “do … until” in Python? [duplicate]
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jQuery convert line breaks to br (nl2br equivalent)
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Java Equivalent of C# async/await?
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How to store arbitrary data for some HTML tags
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